Ceres Duarte Guedes Cabral de Almeida

Scopus Publications

Water relations and physiology of maize in response to soil moisture levels and greenhouse fertilization systems
Martiliana M. Freire, José A. Santos Júnior, Ceres D. G. C. de Almeida, Laís B. Franco, Lucas Y. de C. Leal, Alan H. S. Silva, and Salomão de S. Medeiros
FapUNIFESP (SciELO)
ABSTRACT The water status of crops is directly affected by soil water availability. As such, this study aimed to analyze water relations in maize (double-cross hybrid AG 1051) under different soil moisture contents (80, 90, 100, 110, and 120% of field capacity - FC) and fertilization systems (conventional and fertigation). The experiment was carried out in a greenhouse at the Agricultural Engineering Department of Universidade Federal Rural de Pernambuco, in the municipality of Recife, Pernambuco state, Brazil, from August to October 2019. The experimental design was randomized blocks with a 5 × 2 factorial scheme, four replicates and a total of forty experimental units. At soil moisture levels below 100% of field capacity (100% FC), fertigation increased the relative water content, leaf succulence, leaf water potential, and osmotic adjustment of maize plants. When compared to conventional fertilization, fertigation resulted in higher transpiration rates and better water use efficiency in crops irrigated at 95% of field capacity (95% FC). In plants submitted to soil moisture levels below 100% FC, the fertilization system influenced water, osmotic, and pressure potential, and osmotic adjustment occurred.

Validation of Double Constant and Falling Head Permeameter for Determination of Hydraulic Conductivity of Soils in the Laboratory
Brivaldo Gomes de Almeida, Edson Marlon Da Silva Santos, Fernando José Freire, Ceres Duarte Guedes Cabral de Almeida, Talmo Henrique Dos Santos Silva, Ana Lua Telles Lima, and Jaedson Cláudio Anunciato Mota
Revista Brasileira de Geografia Fisica
The objective of this research was to validate alternative equipment for determining the hydraulic conductivity of saturated soil (Ksat) in laboratory settings. The aim was to develop a single piece of equipment that could be used to carry out tests using both the constant-head permeameter (CHP) and the falling-head permeameter (FHP) methods with minimal disturbance to the samples. To this end, undisturbed soil samples were collected (in volumetric cylinders with 100 and 250 cm3) from three soil profiles with different textures to evaluate the sensitivity of the double permeameter (DP) in determining Ksat, considering the method, the sample size, and the textural class of the soils. To assess the efficacy of the DP in estimating Ksat, the coefficient of variation (CV) was determined for the two methods (CHP and FHP), the sample size (100 and 250 cm3), and the applied hydraulic head (cwc) (constant: 1.5 and 2.5 cwc; falling: Δhi, upper limit, h1 = 67.6 and h2 = 57.6 cwc; Δhii, medium limit, h1 = 49.3 and h2 = 39.3 cwc; and Δhiii, lower limit, h1 = 31.3 and h2 = 21.3 cwc). The results indicate that the DP may be employed as an alternative permeameter for Ksat tests employing the CHP and FHP methods. The most favorable statistical coefficients were observed in tests conducted with samples of a sandy texture (Profile 3, Ap horizon), particularly those with a larger volume (250 cm3), for both the CHP and FHP methods, irrespective of the applied hydraulic head. The equipment can be utilized within the full range of methodological limits employed in this study, and the appropriate limit must be selected according to the physical properties of the soil to be employed in the tests.

Water requirement and single and dual crop coefficients of sesame cultivated in the coastal tablelands of Brazil
Julianna Catonio da Silva, George do Nascimento Araújo Júnior, Adolpho Emanuel Quintela da Rocha, Thieres George Freire da Silva, Iêdo Peroba de Oliveira Teodoro, José Wanderson Silva dos Santos, Márcio Aurélio Lins dos Santos, Iêdo Teodoro, Gustavo Bastos Lyra, Ceres Duarte Guedes Cabral de Almeida,et al.
Wiley
AbstractSesame irrigation is essential in drought‐prone regions. However, information about the water needs of sesame is scarce. Therefore, the objective of this study was to determine crop evapotranspiration (ETc) and the sesame crop coefficient (Kc) during the rainy (S1) and dry (S2) seasons in the coastal tablelands of Alagoas, Brazil. The BRS Seda cultivar was grown in Rio Largo, Alagoas, Brazil, between 2021 and 2022. A system with 25 drainage lysimeters was installed to estimate the daily and cumulative ETc and the Kc for the entire crop cycle. The ETc was partitioned into transpiration (T) and evaporation (E), and the basal crop coefficients (Kcb) and soil evaporation coefficients (Ke) were subsequently estimated. The daily and cumulative ETc were 3.04 mm day−1 and 450.4 mm cycle−1, respectively, in S1 and 3.52 mm day−1 and 440.1 mm cycle−1, respectively, in S2. Regardless of the season, T was the main water flux (74%–80% of the ETc). The mean values of Kc were similar for S1 (0.79) and S2 (0.75), and Kcb and Ke followed the same trend as T and E, respectively. The accumulated ETc and Kc of sesame cultivated in the coastal tablelands of Alagoas, Northeast Brazil, are similar for the rainy and dry seasons.

WATER RETENTION AND PORE SIZE DISTRIBUTION IN SOILS CULTIVATED WITH SUGARCANE COMPARED TO A PERMANENT PRESERVATION AREA
Edilson Amaral Tavares Coutinho, Alison José da Silva, Douglas Monteiro Cavalcante, Brivaldo Gomes de Almeida, MATEUS ROSAS RIBEIRO FILHO, and Ceres Duarte Guedes Cabral de Almeida
Brazilian Journal of Irrigation and Drainage - IRRIGA
WATER RETENTION AND PORE SIZE DISTRIBUTION IN SOILS CULTIVATED WITH SUGARCANE COMPARED TO A PERMANENT PRESERVATION AREA1 EDILSON AMARAL TAVARES COUTINHO2; ALISON JOSÉ DA SILVA2; DOUGLAS MONTEIRO CAVALCANTE2; BRIVALDO GOMES DE ALMEIDA2; MATEUS ROSAS RIBEIRO FILHO2 AND CERES DUARTE GUEDES CABRAL DE ALMEIDA3 1Part of the first author's dissertation of Master of Science presented at the Soil Science Post-Graduation Program at the Federal Rural University of Pernambuco (UFRPE) 2Agronomy Departament, Soil Science Post-Graduation Program at the Federal Rural University of Pernambuco (UFRPE), St Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP 52171-900, Recife, PE, Brazil. Fone (81) 999077045, email: edilsonsta@gmail.com, alisonjose1997@gmail.com, cavalcante.doug@gmail.com, brivaldo.almeida@ufrpe.br, mateus.ribeirofo@ufrpe.br 3Full Professor, Agricultural College Dom Agostinho Ikas, CODAI, UFRPE, Rodovia PE 005, km 25, 4000, Tiuma, CEP 54737-200, São Lourenço da Mata, PE, Brazil, ceres.cabral@ufrpe.br 1 ABSTRACT The soil structural condition, cultivated with sugarcane, is related to the type of harvest adopted which influences the soil porosity, an important variable in the circulation of the liquid and gaseous phases of the soil. These phases can be directly affected by soil management and cultivation, where mechanized raw sugarcane harvesting can improve them. Thus, this research aimed to evaluate soil porosity (P) and its pore size distribution (PSD) in classes, as well as the soil water content at field capacity (qfc), cultivated with sugarcane under two harvest methods: raw and burnt sugarcane. Thus, three areas were compared: two under different ways of harvesting sugarcane (with and without burning); and one in a native forest as a reference. P, PSD (macro, meso, and microporosity), and qfc were determined in soil samples collected in volumetric cylinders, by the saturation and tension table methods, respectively. The results point out that the soil under native forest presented the highest values for the evaluated attributes, indicating that sugarcane cultivation, with or without burning, reduces them. Burning promoted negative changes in the soil concerning water conduction and soil aeration, even in a recent cultivation area (five years), promoted by the reduction of qfc (-62.09%), mainly reflecting the decrease in macroporosity (-31.73%) and microporosity (-24.48%). Keywords: burned sugarcane, raw sugarcane, sandy soil, field capacity, native forest. COUTINHO, E. A. T.; SILVA, A. J.; CAVALCANTE, D. M.; ALMEIDA, B. G.; RIBEIRO FILHO, M. R.; ALMEIDA. C. D. G. C. RETENÇÃO DE ÁGUA E DISTRIBUIÇÃO DE TAMANHO DE POROS EM SOLOS CULTIVADOS COM CANA-DE-AÇÚCAR EM COMPARAÇÃO COM ÁREA DE PRESERVAÇÃO PERMANENTE 2 RESUMO A condição estrutural do solo, cultivado com cana-de-açúcar, está relacionada com o tipo de colheita adotado, o qual influencia a porosidade do solo, uma importante variável de circulação das fases líquida e gasosa do solo. Estas fases podem ser afetadas diretamente pelo manejo e cultivo do solo, onde a colheita mecanizada da cana-de-açúcar crua pode melhorá-las. Assim, esta pesquisa objetivou avaliar a porosidade do solo (P) e sua distribuição de tamanho de poros (PSD), bem como o conteúdo de água na capacidade de campo (qfc) do solo cultivado com cana-de-açúcar sob dois métodos de colheita: crua e queimada. Desse modo, foram comparadas três áreas: duas sob diferentes formas de colheita de cana (com e sem queima); e uma em mata nativa, como referência. A P, PSD (macro, meso e microporosidade) e qfc foram determinadas nas amostras coletadas em cilindros volumétricos, utilizando-se os métodos da saturação e da mesa de tensão, respectivamente. Os resultados comprovam que o solo sob mata nativa apresentou os maiores valores para os atributos avaliados, comprovando que o cultivo da cana-de-açúcar, com ou sem queima, reduz os valores desses atributos. A queima promoveu mudanças negativas no solo em relação à condução hídrica e aeração do solo, mesmo em área de cultivo recente (cinco anos), promovidas pela redução da qfc (-62,09%), refletindo, principalmente na diminuição da macroporosidade (-31,73%) e microporosidade (-24,48%). Palavras-chave: cana queimada, cana crua, solo arenoso, capacidade de campo, floresta nativa.

PRODUCTION FUNCTION AND YIELD OF SUGAR CANE CULTIVATED UNDER DIFFERENT WATER, NUTRITIONAL AND SUBSOILING MANAGEMENTS
WANDERSON JOSÉ DE OLIVEIRA, MARIO MONTEIRO ROLIM, GERÔNIMO FERREIRA DA SILVA, MANASSÉS MESQUITA DA SILVA, CERES DUARTE GUEDES CABRAL DE ALMEIDA, and EVANILSON PAULINO DA SILVA
Brazilian Journal of Irrigation and Drainage - IRRIGA
FUNÇÃO DE PRODUÇÃO E RENDIMENTO DA CANA-DE-AÇÚCAR CULTIVADA SOB DIFERENTES MANEJOS HÍDRICO, NUTRICIONAL E SUBSOLAGEM1 WANDERSON JOSÉ DE OLIVEIRA2; MARIO MONTEIRO ROLIM3; GERÔNIMO FERREIRA DA SILVA4; MANASSÉS MESQUITA DA SILVA5; CERES DUARTE GUEDES CABRAL DE ALMEIDA6 E EVANILSON PAULINO DA SILVA7 1Parte da tese de doutorado do primeiro autor, apresentada ao Programa de Pós-graduação em Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Campus Recife, Recife PE, Brasil. 2Secretaria de Educação de Pernambuco, Governo do Estado de Pernambuco, Av. Afonso Olindense, n° 1513, CEP - 50810-000, Recife PE, Brasil, wanderson.jdoliveira@professor.educacao.pe.gov.br 3 Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP – 52171-900, Recife PE, Brasil, mario.rolim@ufrpe.br evanilson.psilva@gmail.com 4 Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP – 52171-900, Recife PE, Brasil, geronimo.silva@ufrpe.br 5 Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP – 52171-900, Recife PE, Brasil, manasses.mesquita@ufrpe.br 6 Colégio Dom Agostinho Ikas, Universidade Federal Rural de Pernambuco, Rodovia PE 05 Km 25, n° 4000, Tiúma, CEP - 54.737-200, Lourenço da Mata PE, Brasil, ceres.cabral@ufrpe.br 7 Estação Experimental de Cana-de-açúcar de Carpina, Universidade Federal Rural de Pernambuco, Rua Ângela Cristina Canto Pessoa de Luna, s/n, Bairro Novo, CEP - 55812-010, Carpina PE, Brasil, evanilson.psilva@gmail.com 1 RESUMO Com o objetivo de identificar a função de produção que estima o máximo rendimento de açúcar e álcool na cana-de-açúcar cultivada com diferentes doses de nitrogênio, lâminas de irrigação em solo com e sem subsolagem, foi realizado um experimento em campo com cana soca. Os tratamentos consistiram em quatro lâminas de irrigação (0, 50, 100 e 150% da ETC) e 5 doses de N (0, 40, 80, 120 e 160 kg ha-1). Foi utilizado um delineamento de 5x4x2 com 3 repetições em blocos inteiramente casualizados. A produtividade foi obtida por meio da pesagem dos colmos. A partir da função de produção foram determinadas a região de produção máxima, a taxa marginal de substituição e a região de produção racional. Através da produtividade foram calculados os rendimentos de açúcar e álcool. As lâminas, doses de N e produtividades máximas encontradas foram, de 2033 mm, 131 Mg ha-1 e 125 Mg ha-1 no solo sem subsolagem e de 1729 mm, 137 Mg ha-1 e 127 Mg ha-1 no solo com subsolagem. Para o maior rendimento de açúcar e álcool a aplicação de insumos deve permanecer nas doses de N entre 80 a 160 kg ha-1 e lâminas entre 1456 e 1731 mm. Palavras-chave: curva de isoproduto, Saccharum officinarum, taxa marginal, álcool. OLIVEIRA, W. J; ROLIM, M. M.; SILVA, G. F.; SILVA, M. M.; ALMEIDA, C. D. G.C.; SILVA, E. P. FUNCTION OF PRODUCTION AND YIELD IN SUGAR CANE CULTIVATED UNDER DIFFERENT MANAGEMENT NUTRITIONAL AND WATER AND SUBSOLATION 2 ABSTRACT With the objective of identifying the production function that estimates the maximum yield of sugar and alcohol in sugarcane cultivated with different doses of nitrogen, irrigation depths in soil with and without subsoiling, an experiment was carried out in the field with ratoon cane. Treatments consisted of four irrigation depths (0, 50, 100 and 150% of ETC) and 5 N doses (0, 40, 80, 120 and 160 kg ha-1). A 5x4x2 design with 3 replications in completely randomized blocks was used. Productivity was obtained by weighing the stalks. From the production function, the region of maximum production, the marginal rate of substitution and the region of rational production were determined. Through productivity, the yields of sugar and alcohol were calculated. The depths, N doses and maximum productivity found were 2033 mm, 131 Mg ha-1 and 125 Mg ha-1 in the soil without subsoiling and 1729 mm, 137 Mg ha-1 and 127 Mg ha-1 in the soil with subsoiling. For the highest yield of sugar and alcohol, the application of inputs should remain at doses of N between 80 and 160 kg ha-1 and depths between 1456 and 1731 mm. Keywords: yield function, isoproduct curve, Saccharum officinarum, marginal rate, alcohol.

Productivity and technological quality in sugarcane ratoon under subsoiling between planting rows in the northeast region of Brazil
Evanilson Paulino da Silva, Ceres Duarte Guedes Cabral de Almeida, Mário Monteiro Rolim, Djalma Euzébio Simões Neto, Wanderson José de Oliveira, and Manasses Mesquita da Silva
Universidad Nacional de Colombia
Different soil management systems can change the sugarcane yield and quality parameters for sugar/ethanol production. The objective of this study was to evaluate the effects of subsoiling on the inter-row of sugarcane ratoons after the second harvest on productivity and technological quality. Productivity was estimated in tonnes of sugarcane per hectare (TSH), and technological quality parameters were apparent sucrose percentage (Pol) and total sugar recoverable per hectare (TRS). The apparent sucrose percentage and total recoverable sugar were measured in tonnes per hectare, corresponding to the parameters TSH and total recoverable sugar in tonnes per hectare (TTRSH), respectively. This research was carried out at the Experimental Sugarcane Station at the Federal Rural University of Pernambuco in the northeast region of Brazil. A randomized complete block design was used, with two treatments: conventional tillage and inter-row subsoiling. Subsoiling provided a significant gain of stalk yield of 5.53 tonnes per hectare. The other parameters evaluated did not differ significantly.

Assessing different methodologies for irrigation scheduling in protected environment: a case study of green bell pepper
Ceres Duarte Guedes Cabral de Almeida, Leandro Candido Gordin, Alexsandro Cláudio dos Santos Almeida, José Amilton Santos Júnior, Brivaldo Gomes de Almeida, and Giuseppe Provenzano
Springer Science and Business Media LLC

GAP FILLING PROCEDURES OF CLIMATOLOGICAL SERIES IN THE STATE OF PERNAMBUCO
LÍVIA MARIA CAVALCANTE SILVA, FABIANO SIMPLICIO BEZERRA, MARIA CATIANA DE VASCONCELOS, MADSON RAFAEL BARBALHO DA SILVA, ANA CLÁUDIA DAVINO DOS SANTOS, and CERES DUARTE GUEDESCABRAL DE ALMEIDA
Brazilian Journal of Irrigation and Drainage - IRRIGA
This study aimed to compare the applicability of three methods of filling gaps in rainfall and temperature data from thirteen automatic weather stations (AWS) in the state of Pernambuco, from January to December 2019. The methods used were arithmetic mean, regional weighting, and simple linear regression. The data estimated by filling techniques have been subjected to comparison using R² and descriptive statistical analysis. The estimated data of air temperature presented R2 equal or very close to 1 for the three methods. On the other hand, the estimated data of rainfall showed values similar or closer to the real data only to regional weighting (R² = 1) and linear regression (R² = 0.99) methods. The smallest values of standard deviation (1.70) for temperature were obtained with linear regression. The regional weighting method and unfilled data showed greater uniformity for precipitation. The analyzed methods to estimate the climatic variables, air temperature, and precipitation, on a monthly scale, were efficient to fill in missing data in the evaluated AWS. The simple linear regression method is more efficient and adequate, followed by regional weighting, to fill in missing data in climate databases.

Assessing the productivity of coriander under different irrigation depths and fertilizers applied with continuous and pulsed drip systems
Valentin Ruben Orcon Zamora, Manassés Mesquita da Silva, José Amilton Santos Júnior, Gerônimo Ferreira da Silva, Dimas Menezes, and Ceres Duarte Guedes Cabral de Almeida
IWA Publishing
Abstract In this study, the authors analyzed the consequences of irrigation management strategies as an essential factor to save water and maintain high crop yields. The present research aimed at comparing coriander (Coriandrum sativum L.), cv. Verdão, yields under fertigation via drip irrigation with a continuous application and in pulses, with 40, 60, 80, 100 and 120% of the crop evapotranspiration (ETc) being recovered. These treatments were distributed in randomized blocks in a 2 × 5 factorial scheme, with three replications, in a greenhouse located at the Federal Rural University of Pernambuco, northeast Brazil (08°01′6.50″ S and 34°56′46″ W, average elevation 6.5 m). The continuous irrigation consisted of the application of water depth in a single daily event, while pulsed irrigation comprised the application of the same irrigation depth split up into five events with a 1-hour interval between pulses. Crop evapotranspiration (ETc) was determined via the water balance by lysimetric drainage. The fertilizers were applied in every watering. The biometric and productivity crop pointed that pulsed irrigation to a mean depth of 58% of the ETc corresponds to the results obtained with the application of the depth equivalent to 100% of the ETc by continuous irrigation, consequently with reduced input costs.

Comparison of meteorological data, related to reference evapotranspiration, from conventional and automatic stations in the sertão and agreste regions of pernambuco, brazil
Iug Lopes, Miguel Julio Machado Guimarães, Juliana Maria Medrado de Melo, Ceres Duarte Guedes Cabral de Almeida, Breno Lopes, and Brauliro Gonçalves Leal
Universidad Nacional de Colombia
The objective was to perform a comparative study of the meteorological elements data that most cause changes in the reference Evapotranspiration (ETo, mm) and its own value, of automatic weather stations AWS and conventional weather stations CWS of the Sertão and Agreste regions of Pernambuco State. The ETo was calculated on a daily scale using the standard method proposed by the Food and Agriculture Organization (FAO), Penman-Monteith (FAO-56). The ETo information obtained from AWS data can be used to update the weather database of stations, since there is a good relationship between the ETo data obtained from CWS and AWS, statistically determined by the Willmott's concordance index (d > 0.7). The observed variations in the weather elements: air temperature, relative humidity, wind speed, and global solar radiation have not caused significant changes in the ETo calculation.

Development and validation of a new calibration model for diviner 2000<sup>®</sup> probe based on soil physical attributes
Giuseppe Provenzano, Giovanni Rallo, Ceres Duarte Guedes Cabral de Almeida, and Brivaldo Gomes de Almeida
MDPI AG
This study aimed to develop a new model, valid for soil with and without expandable characters, to estimate volumetric soil water content (θ) from readings of scaled frequency (SF) acquired with the Diviner 2000® sensor. The analysis was carried out on six soils collected in western Sicily, sieved at 5 mm, and repacked to obtain the maximum and minimum bulk density (ρb). During an air-drying process SF values, the corresponding gravimetric soil water content (U) and ρb were monitored. In shrinking/swelling clay soils, due to the contraction process, the variation of dielectric permittivity was affected by the combination of the mutual proportions between the water volumes and the air present in the soil. Thus, to account for the changes of ρb with U, the proposed model assumed θ as the dependent variable being SF and ρb the independent variables; then the model’s parameters were estimated based on the sand and clay fractions. The model validation was finally carried out based on data acquired in undisturbed monoliths sampled in the same areas. The estimated θ, θestim, was generally close to the corresponding measured, θmeas, with Root Mean Square Errors (RMSE) generally lower than 0.049 cm3 cm−3, quite low Mean Bias Errors (MBE), ranging between −0.028 and 0.045 cm3 cm−3, and always positive Nash-Sutcliffe Efficiency index (NSE), confirming the good performance of the model.

Calibration of two capacitive soil moisture sensors in ultisol
Anabel De los Ángeles Calva Jiménez, Ceres Duarte Guedes Cabral de Almeida, Jose Amilton Santos Junior, and Célia Silva dos Santos
Universidad Nacional de Colombia
Los objetivos de este estudio fueron realizar la calibración y determinar las ecuaciones de calibración de dos sensores de humedad de suelo ECH2O para un suelo Ultisol colectado en el Municipio de Pesqueira-PE, localizado en el Semiárido Brasileño. El estudio se llevó a cabo en baldes plásticos de 5 litros implementados en ambiente protegido en la Universidad Federal Rural de Pernambuco, Recife-PE, donde se realizó el monitoreo diario de la humedad del suelo durante 51 días, desde la humedad de saturación hasta el secado natural. Los autores verificaron que los sensores ECH2O presentaron una respuesta exponencial a la variación de humedad de suelo obteniendo R2>0,97. Valoresde RMSE variaron de 0,065 a 0,012 m3 m-3 para el sensor 5TE y de 0,045 a 0,011 m3 m-3 para el EC-5. Los investigadores concluyeron que las ecuaciones de calibración obtenidas fueron más precisas que las ecuaciones de fábrica para ese tipo de suelo.

Soil physical-hydric properties by pedotransfer function in soils of coastal plains of pernambuco
Fernanda Helena Nascimento Andrade, Ceres Duarte Guedes Cabral de Almeida, Brivaldo Gomes de Almeida, João Audifax Cézar Albuquerque Filho, Bruno Campos Mantovanelli, and José Coelho Araújo Filho
Brazilian Journal of Irrigation and Drainage - IRRIGA
ATRIBUTOS FÍSICO-HÍDRICOS DO SOLO VIA FUNÇÕES DE PEDOTRANSFERÊNCIA EM SOLOS DOS TABULEIROS COSTEIROS DE PERNAMBUCO  FERNANDA HELENA NASCIMENTO DE ANDRADE1; CERES DUARTE GUEDES CABRAL DE ALMEIDA2; BRIVALDO GOMES DE ALMEIDA3; JOSÉ AUDIFAX CÉZAR DE ALBUQUERQUE FILHO1; BRUNO CAMPOS MANTOVANELLI4 E JOSÉ COELHO DE ARAÚJO FILHO5  1 Departamento de Engenharia Agrícola, Programa de Pós-Graduação em Engenharia Agrícola da Universidade Federal Rural de Pernambuco - UFRPE, Rua Dom Manuel de Medeiros, S/N, Dois Irmãos, CEP: 52171-900, Recife, PE, Brasil, fernanda_andrade89@hotmail.com, jaudifax@deagri.ufrpe.br 2 Colégio Agrícola Dom Agostinho Ikas, Programa de Pós-Graduação em Engenharia Agrícola da Universidade Federal Rural de Pernambuco - UFRPE, Rua Dom Manuel de Medeiros, S/N, Dois Irmãos, CEP: 52171-900, Recife, PE, Brasil, ceres.codai.ufrpe@gmail.com. 3 Departamento de Agronomia, Programa de Pós-Graduação em Ciência do Solo da Universidade Federal Rural de Pernambuco - UFRPE, Rua Dom Manuel de Medeiros, S/N, Dois Irmãos, CEP: 52171-900, Recife, PE, Brasil, brivaldoalmeida@gmail.com. 4 Departamento de Ciências Rurais, Programa de Pós-Graduação em Ciência do Solo da Universidade Federal de Santa Maria - UFSM, Avenida Roraima, n° 1000, Camobi, CEP: 97105-900, Santa Maria, RS, Brasil, brunomantovanelli21@gmail.com. 5 Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA Solos - UEP Recife, Rua Antônio Falcão, n° 402, Boa Viagem, CEP: 51020-240, Recife, PE, Brasil, jose.coelho@embrapa.br.   1 RESUMO  Objetivou-se gerar funções de pedotransferência (FPT) com base em dados das frações granulométricas, distribuição do tamanho de poros, densidade do solo e de partículas para estimar a umidade do solo equivalente à capacidade de campo (CC), ponto de murcha permanente (PMP) e a capacidade de armazenamento de água disponível (CAD) em Argissolos Amarelos representativos dos tabuleiros costeiros na zona da mata norte de Pernambuco. Para isso, foram coletadas amostras deformadas e indeformadas na camada 0,00 - 0,20 m de profundidade. As FPTs foram geradas a partir do método de regressão linear múltipla aplicando a técnica de stepwise backward. Este método eliminou alguns atributos físico-hídricos do solo baseado nos valores de R2 e no Teste t. Os coeficientes de regressão do modelo proposto para predição de CAD, CC e o PMP apresentaram significância de 1% de probabilidade para as variáveis independentes selecionadas para cada modelo, indicando que esses parâmetros podem ser preditos, com ótima precisão, a partir do conteúdo de areia, argila, mesoporosidade, microporosidade e densidade do solo, as quais são fáceis de serem determinadas e obtidas, pré-requisito básico para construção das FPTs.  Palavras-chave: manejo de irrigação, stepwise backward, índices estatísticos.   ANDRADE, F. H. N.; ALMEIDA, C. D. G. C.; ALMEIDA, B. G.; ALBUQUERQUE FILHO, J. A. C.; MANTOVANELLI, B. C.; ARAÚJO FILHO, J. C. SOIL PHYSICAL-HYDRIC PROPERTIES BY PEDOTRANSFER FUNCTION IN SOILS OF COASTAL PLAINS OF PERNAMBUCO  2 ABSTRACT  Aimed to generate pedotransfer functions (PTF) based on particle size, pore size distribution, soil and particle density to estimate the field capacity (CC), permanent wilting point (PMP) and available water capacity (CAD) in Ultisol Typic Fragiaquults in coastal plains of Pernambuco. Thus, deformed and undeformed samples were collected at 0.00 - 0.20m depth. PTFs were generated from multiple linear regression method by stepwise backward technique. This method eliminated some hydro-physical soil attributes, based on the values of R2 and t test. CAD, CC and PMP estimated values showed a significant correlation of 1% probability for independent variables selected for each model. Thus, available water capacity, field capacity and permanent wilting point can be predicted with great precision by sand, clay content, mesoporosity, microporosity and soil density, which are easy to determine and obtain, basic prerequisite for construction of PTFs.  Keywords: irrigation management, stepwise backward, statistical indexes.

Accuracy of capacitive sensors for estimating soil moisture in northeastern Brazil
Anabel de los Ángeles Calva Jiménez, Ceres Duarte Guedes Cabral de Almeida, José Amilton Santos Júnior, José Edson Florentino de Morais, Brivaldo Gomes de Almeida, and Fernanda Helena Nascimento de Andrade
Elsevier BV

Geospatial variation of physical attributes and sugarcane productivity in cohesive soils
Thiago Rodrigo Schossler, Bruno Campos Mantovanelli, Brivaldo Gomes de Almeida, Fernando José Freire, Manassés Mesquita da Silva, Ceres Duarte Guedes Cabral de Almeida, and Maria Betânia Galvão dos Santos Freire
Springer Science and Business Media LLC

Irrigation scheduling techniques and irrigation frequency on capsicum growth and yield
Leandro Candido Gordin, Ceres Duarte Guedes Cabral de Almeida, José Amilton Santos Júnior, Ênio Farias de França e Silva, Alexsandro Claudio Dos Santos Almeida, and Girlayne Santana Noberto da Silva
Universidad Nacional de Colombia
The present study aimed to evaluate different irrigation scheduling strategies on capsicum growth and yield inprotected environment. The experiment was carried out at the Northeastern of Brazil. Five irrigation scheduling techniques to define water depth (weighing lysimeter, Hargreaves-Samani equation, Piché evaporimeter, tensiometer and soil moisture sensor) andtwo application frequencies (F1-once a day and F2-alternating frequency) were tested. A completely randomized factorial design experiment was installed in a 5 x 2 factorial scheme, with eight replicates. It was observed that the variables stem diameter and leaf area index were influenced by the irrigation scheduling techniques, and treatments based on Hargreaves-Samani and lysimeter scheduling methods led to the lowest values. Fruit biometric parameters were significantly affected only by the Hargreaves-Samani treatment. It can be concluded that both irrigation scheduling techniques and frequencies influenced capsicum growth and yield. Furthermore, irrigation management techniques based on soil sensors caused the highest yields.

Medium-term influence of conventional tillage on the physical quality of a Typic Fragiudult with hardsetting behavior cultivated with sugarcane under rainfed conditions
Hernán Novelo León, Brivaldo Gomes Almeida, Ceres Duarte Guedes Cabral Almeida, Fernando José Freire, Edivan Rodrigues Souza, Emídio Cantídio Almeida Oliveira, and Evanilson Paulino Silva
Elsevier BV

Rainfall zoning for cocoa growing in bahia state (Brazil) using fuzzy logic

Rocket production in a low cost hydroponic system using brackish water
José Eustáquio Campos Júnior, José Amilton Santos Júnior, Juliana Bezerra Martins, Ênio Farias de França e Silva, and Ceres Duarte Guedes Cabral de Almeida
FapUNIFESP (SciELO)
ABSTRACT The production of vegetables in communities of family farmers in semiarid regions is limited due to rudimentary cultivation practices and systems, water scarcity, and excess salts in the water and soil. Thus, the objective of this work was to evaluate the production of rocket (Eruca sativa L. cv. Folha Larga) in a low cost hydroponic system, considering strategies for the use of brackish water in the nutrient solution. The experiments were conducted in complete randomized designs, in 6×2 factorial arrangements, with five replications, using rocket plants grown in different nutrient solutions, consisting of six salinity levels (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m -1) and two circulation frequencies of the nutrient solution (twice a day, at 8:00h, and 16:00h; and three times a day, at 8:00h, 12:00h, and 16:00h). In Experiment I, the nutrient solution lost by evapotranspiration was replenished with the respective brackish water used in its preparation; and in Experiment II it was replenished with public water (0.12 dS m -1). The shoot and root fresh and dry biomass of the plants and their respective dry weight proportions, and biometric variables were evaluated. Replenishing of the nutrient solution with public water resulted in lower losses in biomass and plant growth. The increases in circulation frequency of the nutrient solution did not affect the biometric variables, however, the plants prioritized shoot biomass development to the detriment of the root when using high circulation frequencies.

FDR ECH <inf>2</inf> O sensor performance in spodosols
Ceres Duarte Guedes Cabral de Almeida, Denize Maria Oliveira Silva, Brivaldo Gomes de Almeida, Ênio Farias de França e Silva, Rebeca Neves Barbosa, and José Amilton Santos Júnior
Universidad Nacional de Colombia
Frequency domain reflectometry (FDR) is widely used to measure the soil water contents. However, the soil composition effects on FDR calibration has to be quantified to reduce the need for further calibration. Our objectives were to (1) evaluate the accuracy of EC-5 for measuring soil water content in sandy soils and (2) develop soil-specific sensor calibration curve. Disturbed and undisturbed soil samples were collected in a Sopossol profile (07º 37’ 30’’ S, 34º 57’ 30’’ W) representative of region sugarcane grown, in northeast of Brazil. Regression statistics analysis showed good accuracy and RMSE = 0.01 m3 m-3, while without specific calibration the RMSE = 0.06 m3 m-3. The EC-5 sensor should be subjected to field-specific calibration in sandy soils due to the low field capacity and water content during the growing season.

Statistical process control in the assessment of drip irrigation using wastewater
Sisgo R. Acuña Chinchilla, Ênio F. de F. e Silva, Ceres D. G. C. de Almeida, Alexsandro O. da Silva, and Patrício R. dos Santos
FapUNIFESP (SciELO)
2 Universidade Federal Rural de Pernambuco/ Recife PE, Brasil. 3 Colégio Agrícola Dom Agostinho Ikas, Universidade Federal Rural de Pernambuco/ Recife PE, Brasil. 4 Universidade Federal do Ceará/ Fortaleza CE, Brasil. 5 Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco/ Recife PE, Brasil. Received in: 7-29-2016 Accepted in: 9-25-2017 Engenharia Agrícola, Jaboticabal, v.38, n.1, p.47-54, jan./feb. 2018 Doi:http://dx.doi.org/10.1590/1809-4430-Eng.Agric.v38n1p47-54/2018

Pressure compensating microsprinklers using microtube as a flow controller
Alexsandro C. dos Santos Almeida, Ceres D. G. C. de Almeida, Tarlei A. Botrel, and José A. Frizzone
FapUNIFESP (SciELO)
ABSTRACT Microsprinkler non-pressure compensating nozzles usually show water flow variation along the lateral line. This study aimed at adapting microtubes into non-compensating system of microsprinklers previous installed in the field, as a self-compensated nozzle, to improve the flow uniformity along the lateral line. Microtubes were adapted to three types of commercial microsprinklers. Tests were conducted, both in the laboratory and in field, to evaluate the microsprinkler performance at four different flows (40, 50, 60 and 70 L h-1) under pressure head range from 75 to 245 kPa. Nozzles presented coefficient of flow-rate variation (CVq) lower than 5.5% and distribution uniformity (DU) greater than 95%, which are classified as excellent. The original spatial water distribution of the microsprinkler did not change by using microtube as a nozzle. This device adapted to non-pressure compensating microsprinklers are functional and operate effectively with flows ranging up to 70 L h-1. Small variations at microsprinkler flows along the lateral line can occur, however, at random manner, which is common for pressure-compensating nozzles. Therefore, the microtube technique is able to control pressure variation in microsprinklers.

Support system for irrigation schedulingvia SMS (Short message service)
Diogo Francisco Borba Rodrigues, Ceres Duarte Guedes Cabral de Almeida, and Maria da Conceição Moraes Batista
Brazilian Journal of Irrigation and Drainage - IRRIGA
In remote areas, especially in the north-east of Brazil, small farmers have difficulty in accessing information and obtaining technical assistance on irrigation. The purpose of this paper is to develop a decision support system for irrigation water management via SMS, called IGmanejo, that offers information and irrigation advice on the farmer’s mobile phone. Simulations were performed to evaluate water savings based on current and historical data comparing the values obtained by FAO CropWat 8.0 software. The greater water savings observed in the cycle that began in the transition season showed a reduction of 26%. The proposed software showed that it is able to reduce water waste in agriculture and send simple and quality irrigation advice to remote areas with a technology already assimilated in rural areas, that is, the mobile phone.

The irrigation scheduling igdroid tool
DIOGO FRANSCISCO BORBA RODRIGUES and CERES DUARTE GUEDES CABRAL DE ALMEIDA
Brazilian Journal of Irrigation and Drainage - IRRIGA
THE IRRIGATION SCHEDULING IGDROID TOOL DIOGO FRANSCISCO BORBA RODRIGUES¹ E CERES DUARTE GUEDES CABRAL DE ALMEIDA² 1 Doutorando, Programa de Pos-Graduacao em Engenharia Agricola, Universidade Federal Rural de Pernambuco, diogo.borbar@gmail.com 2 Engenheira Agronoma, Profa Doutora, Colegio Agricola Dom Agostinho Ikas, Universidade Federal Rural de Pernambuco, ceres@codai.ufrpe.br 1 ABSTRACT The speed of information processing of data collected in fields can be a deciding factor in the efficiency of an irrigation system, responding appropriately to crops' water requirements. The objective of this paper was to describe a new tool for irrigation scheduling, called IGdroid. This tool is a mobile phone application for use by farmers who use irrigation and have some climate monitoring equipment, such as rain gauges and evaporation pans, providing irrigation advice in areas based on inputs and outputs data without internet connection. The development process and the main functions of the application are described in this paper. The software is inserted in the farmer's mobile phone to schedule everyday irrigation. Soil properties, irrigation system and crop data must be inserted in the database, so the farmer can insert climatological data in her/his mobile phone on a daily basis. The application can record multiple irrigated areas with different crops, soil types and irrigation systems, and reports irrigation requirements daily. If the farmer needs to irrigate, the app informs her/him of the water depth (mm) and how long to run the system (in hours) in each area. This app also allows simulation of irrigation scenarios in agricultural planning. Keywords: irrigated agriculture, Android, App Inventor

Monitoring of groundwater salinity in lowland under sugarcane cultivation fertigated with vinasse
Wellington P. da Silva, Ceres D. G. C. de Almeida, Mario M. Rolim, Ênio F. de F. e Silva, Elvira M. R. Pedrosa, and Vamberto G. F. Silva
FapUNIFESP (SciELO)
Propôs-se, neste trabalho, avaliar o risco potencial da vinhaça em proporcionar a salinidade e sodicidade das águas subterrâneas em área de várzea cultivada com cana-de-açúcar. O experimento foi conduzido em uma Usina da Mata Sul de Pernambuco durante o período de dezembro de 2010 a setembro de 2011. O dispositivo experimental adotado foi composto de uma malha georreferenciada de 81 poços de monitoramento distribuídos ao longo de uma área de 7,5 ha constituindo três subáreas com 2,5 ha, todas cultivadas com cana-de-açúcar. Na área foram aplicadas doses equivalentes a 50, 60 e 65 m³ ha-1 de vinhaça de mosto de melaço. Para a avaliação da qualidade da água subterrânea foram realizadas seis amostragens e analisados os parâmetros CE, pH, Na+, Ca2+, Mg2+ e RAS. A aplicação de doses de vinhaça até 65 m³ ha-1, em áreas de várzea, para os parâmetros analisados, não proporcionou riscos de salinização das águas subterrâneas nem, tampouco, a CE e a RAS para a salinidade e sodicidade no período avaliado. O monitoramento dos parâmetros químicos do lençol freático mostrou, ao longo do tempo, redução de suas concentrações em função da precipitação pluviométrica ocorrida no período estudado.

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