B SAHADEVA REDDY
@angrau.ac.in
Principal Scientist (Agronomy)
Acharya NG Ranga Agricultural University
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Santanu Kumar Bal, Koilakonda Ashok Kumar, Kaipa Venkata Subrahmanya Sudheer, Abburi Venkata M. Subba Rao, Kanagala Pavani, Chagam Venkata Chandra Mohan Reddy, Bodireddy Sahadeva Reddy, Malamal Alickal Sarath Chandran, Narayanan Manikandan, and Vinod Kumar Singh
Wiley
ABSTRACTThe crop productivity in rainfed regions is driven by the quantum and distribution of rainfall during the crop growth period. The dry spell index (DSI) was used in the present investigation to quantify the cumulative impact of dry spells on major rainfed crops of the kharif season (June–September) in India's semi‐arid regions of Andhra Pradesh. The effect of DSI on the yield of major rainfed crops, i.e., groundnut, pigeon pea, cotton, maize and pearl millet was estimated and compared with the widely used standard precipitation index (SPI). Our results revealed that among the various districts, a higher DSI (> 16.1) was noticed in Anantapur that experienced a DSI of 8.1–16.0 in 77% of the years during the study period (1998–2019), which indicated that the crop suffered stress conditions during the season affecting the crop yields. Moreover, a significant negative correlation was observed between the yields of various crops (groundnut, pigeon pea, maize and pearl millet) and DSI. On the other hand, SPI analysis showed that 74%–83% of the years experienced normal (−0.99 to 0.99) to moderately dry (−1.00 to −1.49) conditions, indicating normal rainfall status during the season. At the same time, no significant correlation was found between the SPI and crop yields. Therefore, the present study revealed that the DSI performed better in quantifying the dry spells and their impact on crop yields, especially under rainfed conditions in the semi‐arid regions of south‐east India.
A. MALLISWARA REDDY, A. PRATAP KUMAR REDDY, B. RAVINDRANATHA REDDY, M.V.S. NAIDU, P. SUDHAKAR, and B. SAHADEVA REDDY
The Indian Society of Agronomy
A field experiment was conducted during the rainy season (kharif) of 2017 and 2018 at Agricultural Research Station of the Acharya N.G. Ranga Agricultural University, Ananthapuramu, Andhra Pradesh, to study the effect of integrated rainwater-management practices on soil properties and groundnut (Arachis hypogaea L.) productivity. The experiment was laid out in a randomized block design with 9 rainwater-management practices with 3 replications. Results indicated that, application of shales @ 300 t/ha as surface mulch combined with 2 supplemental irrigations of 10 mm each when dryspell of 10 days occurs after 50% flowering treatment (T7 ) increased the porosity, water holding capacity, infiltration rate by 17.8, 41.2 and 24.6%, respectively, and bulk density was reduced by 5.0% compared to dryland groundnut (T1 ). Similarly, the same treatment (T7 ) enhanced the groundnut pod yield by 39.68% compared to the control (T1). Thus, application of shales @ 300 t/ha as surface mulch combined with 2 supplemental irrigations of 10 mm each when dryspell of 10 days occurs after 50% flowering proved the best integrated rainwater-management practice to improve soil properties and increase the productivity of groundnut under arid and semi-arid regions of Andhra Pradesh.
, R. Narasimhulu, R. Veeraraghavaiah, , B. Sahadeva Reddy, , C. Tara Satyavathi, , B.C. Ajay, ,et al.
Triveni Enterprises
Aim: To assess genotypes with ability to sustain yields under arid region and to understand the significance of interactive effects of genotype × environment to develop resilient cultivars for rainfed farming. Methodology: Performances of 12 pearl millet varieties and hybrids released for commercial cultivation in India, were estimated using RBD with three replications during rainy seasons of 2018, 2019 and 2020. The trials were conducted at the Agricultural Research Station, ANGRAU, Ananthapuramu, located in the Scarce Rainfall Zone of Andhra Pradesh, India, with an average annual rainfall of nearly 553 mm and 300 mm to 400 mm during rainy season. Results: The environment and genotype effects were highly significant in the Additive Main Effect and Multiplicative Interaction (AMMI) model, implying that environments are varied and genotypes performed differently in each environment offering a great scope for selecting better adaptive genotypes. Apart from moisture stress, the amount of rainfall received during both the anthesis and grain maturation stages were influenced grain yield through plant height, 1000-grain weight and dry fodder yield. Environment 3 was the best discriminating environment and the hybrids Pratap, 86M86 and NBH 5767 had outperformed the popular open pollinated varieties in ideal conditions. Interpretation: In terms of grain yield,Pusa Comp. 612 and Pratap have proved to be reliable and had a mean higher than the general mean over environments. As a result, Pusa Comp. 612 and Pratap are suggested for large-scale assessment in a wide range of locations in rainfed situations of arid regions. Key words: GT-biplot, Grain yield, Pearl millet, Stability, Trait associations
C Yella Swami, Senthil Kumaran G, Naik R K, Sanjeeva Reddy B, and Rathinakumari C A
Society for Promotion of Horticulture
Dry chilli production in India condition faces many challenges apart from adverse weather conditions, labor-intensive production practices and higher overall production costs are limiting profitable dry chilli cultivation. Therefore, a study was carried to know the key constraints in current chilli production practices in eight major production districts of three states. A systematic research and development approach is essential to know the range of constraints and farmers preferences over technological options for field operations. The harvesting operation alone demands 43% of labour 360.5 man-days/ha. So, red chilli harvesting mechanization is a definite immediate requirement to reduce labour input. Farmers (47%) prefer small size self-propelled chilli harvester over tractor operated equipment. In the production catchments, farmer also inferred to change the cultivation practices to mechanize chilli production operations, but 18% of farmers hesitant to adopt one-timeharvesting chilli varieties due to suspicion about the yield potentials.
R. Narasimhulu, C. Satyavathi, B. Reddy and B. Ajay
EJPB, ISPB, CPBG - Tamil Nadu Agricultural University
One sixty-eight pearl millet germplasm accessions were evaluated using multivariate techniques, principal component and cluster analysis to explore the extent of genetic diversity and association among the yield and yield contributing traits. The first three principal components PC1, PC2 and PC3 with eigen values more than one explains 25.27, 22.15 and 13.38 per cent, respectively, with a cumulative effect of 60.80 per cent of the total variation. Based on factor loading of three PC’s and association analyses explained that the traits viz., number of productive tillers per plant, 1000-seed weight, panicle diameter and plant height function as excellent selection indicators that exhibit positive loading toward genetic diversity. In cluster analysis all the germplasm accessions under the study were sorted into seven distinct clusters. Cluster I having the highest number of lines followed by cluster IV due to similar ancestry of parental lines. The germplasm accessions 4129, 4163, 4157, 5007, 5058, 4104, 4105, 4146, 4150, 4140, 4123 and ICMV 221 exhibit diversity in both cluster and PCA analyses, indicating that utilizing these lines for hybridization procedure to harness heterosis and to select superior segregants in pearl millet.
C Yella Swami, G Senthil Kumaran, R K Naik, B S Reddy, and A C Rathina Kumari
Society for Promotion of Horticulture
The plants and its produce characteristics are the basis to design a crop specific harvester. The objective of this study was to determine the physical, morphological and mechanical properties of chilli crop and fruits, that can be used in the design of harvester machine. The observations and data were collected by taking measurements at harvesting stage of three chilli cultivars. The fruit bearing behavior of plants was solitary with fruit position erect in Demon F1 and pendent in Araka Meghana and Mahyco Tejaswini. The plant height ranged between 81.76 to 84.87cm depending on cultivars and fruits per plant were170.25 number for Tejaswini, 158.96 and 156.15 number, respectively for Araka Meghana and Demon F1. It was observed that the length and diameter at shoulder of fruits was in the range of 4.97 to 10.44 cm and 0.8 to 1,25 cm, respectively. The moisture content reduced in leaves, stems and fruits as the maturation changed from matured green fruits bearing of plants to semi dry condition. The detachment force of fruits from plants increased as the fruits colour changed from matured green to fully ripened red and there after decreased.
Gangalakunta P. Obi Reddy, Nirmal Kumar, Nisha Sahu, Rajeev Srivastava, Surendra Kumar Singh, Lekkala Gopala Krishnama Naidu, Gajjala Ravindra Chary, Chandrashekhar M. Biradar, Murali Krishna Gumma, Bodireddy Sahadeva Reddy,et al.
Springer Science and Business Media LLC
V. Maruthi, K. S. Reddy, P. K. Pankaj, B. S. Reddy, and B. M. K. Reddy
Springer Science and Business Media LLC
B. Sahadeva Reddy, G. R. Maruthi Sankar, B. Ravindranatha Reddy, A. Malliswara Reddy, Y. Padmalatha, P. Radhika, K. Bhargavi, and P. Naga Sravani
American Society of Civil Engineers (ASCE)
AbstractField experiments were conducted during kharif 2009 and 2010 at the Agricultural Research Station, Anantapur, located in the scarce rainfall zone of Andhra Pradesh in south India to assess the effect of dry spells or moisture stress at different crop growth stages on yield attributes, pod yield, and haulm yield of groundnut. The study was conducted in a 3-factor split-split plot design with conditions of (1) rainfed and irrigated as two main plots; (2) stress imposed during 30–50, 50–70, 70–90 days in 2009 and 50–90 days after sowing (DAS) in 2010 and “no stress” as four subplots; and (3) four varieties—ICGV-91114, K-6, TMV-2, and Narayani—as sub-subplots. Among varieties, Narayani gave significantly higher oil content compared with other varieties in both years. Among the stress conditions, significantly higher pod yield was attained under the no-stress condition compared with the stress that occurred during 70–90 DAS, but it was statistically at par with the stress that occurred during 30–50 and...