Sathish A
@uasbamgalore.edu.in
Professor of Soil Science
University of Agricultural Sciences, Bangalore
EDUCATION
MSc(Agri.), Ph D in Soil Science and Agricultural Chemistry
RESEARCH, TEACHING, or OTHER INTERESTS
Soil Science, Nature and Landscape Conservation
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Shantha Kumar Dhanush, M. Mahadeva Murthy, and A. Sathish
Springer Science and Business Media LLC
Vinod Kumar Srinivas, Ravi Kumar B C, Sathish A, and Murukannappa
Action For Sustainable Efficacious Development and Awareness
The morphometric analysis was carried out on the Halayapura micro-watershed in Karnataka, India. Using ArcGIS 10.2.2 and applying the DEM model, the micro-watershed was subjected to quantitative investigation to determine the channel network involved and understand geo-hydrological behavior. In addition, remote sensing and geospatial techniques were used to study the micro-watershed drainage analysis and its associated parameters, such as stream order, stream length, stream frequency, drainage density, texture ratio, form factor, circulatory ratio, elongation ratio, bifurcation ratio, and compactness coefficient for the micro watershed, were evaluated. According to the findings, the stream order ranges from I to IV, with 97 streams in the micro-watershed. Streams of 72, 19, 5, and 1 are found in the I, II III, and IV order, respectively. The bifurcation values range from 3.78 to 5.00, with the average weight around 3.14. The elongation ratio and farm factor are 0.77 and 0.46, respectively. The drainage density of the micro watershed is 5.20 km/km2. The form factor, circularity, and elongation ratio contribute to a basin with an elongated shape through decreased flood proneness, erosion, and sediment transport capacity. The results of the micro-watershed morphometric assessment are critical for evaluating and managing water resources and selecting a recharge structure for future water management in the study region.
J. Veena and A. Sathish
Diva Enterprises Private Limited
Priyadarshi Maurya, Mrinalini Goswami, Sunil Nautiyal, Satya Prakash, Anil Kumar Gupta, and A Sathish
Springer Science and Business Media LLC
Altaf Kuntoji, C.T. Subbarayappa, A. Sathish, V. Ramamurthy, and B.C. Mallesha
Diva Enterprises Private Limited
T.R. Rupa, A.N. Ganeshamurthy, K. Alivelu, S. Rajendiran, and A. Sathish
Pisa University Press
Pothagani N. Siva Prasad, Chickadibburahalli Thimmappa Subbarayappa, Ayyappa Sathish, and Venkataramanappa Ramamurthy
Informa UK Limited
Abstract Critical limit (CL) determination of zinc (Zn) is much more important to assess the response of crop to its application in soils and for crops actual fertilizer requirement. This experiment was conducted at University of Agricultural Sciences, Bangalore in sandy clay loam texture soils. Based on the results of the pot culture experiment, the critical limits of DTPA, AB-DTPA, Mehlich-3, tomato plant and tomato fruit are 1.12, 1.20, 2.15, 34 and 58 mg kg−1, respectively. Tomato was highly responded to Zn application in soils below the critical limit whereas soils with Zn greater than 1.12 mg kg−1 did not respond much. For the confirmation of pot culture results, two field experiments were carried out during 2017–18 with different Zn treatments one in high and other in low zinc soils. The study concluded that for both low zinc and high zinc soils external application of zinc through Recommended dose of fertilizers (RDF) + ZnSO4 @ 30 kg ha−1 as soil application (SA) + foliar application (FA) @ 0.50% ZnSO4 and RDF + ZnSO4 @ 20 kg ha−1 as SA + FA @ 0.25% ZnSO4 significantly improved yield, nutrient concentration and uptake of nutrients, which helped in getting higher benefit cost (B:C) ratio of 4.74 and 4.96, respectively. This information is helpful in site-specific zinc nutrition in tomato and to enhance the productivity and profitability.
A. Sathish and L. Madhu
Diva Enterprises Private Limited
M. Harsha, A. Sathish, and M.A. Ananthakumar
Diva Enterprises Private Limited
M. K. Prasannakumar, L. M. Netravathi, H. B. Mahesh, P. Buela Parivallal, M. E. Puneeth, A. Sathish, Devanna Pramesh, Sushil K. Middha, Anupam J. Das, and B. S. Rohit
Springer Science and Business Media LLC
Albara Almawazreh, Daniel Uteau, Andreas Buerkert, Ayappa Sathish, Mudalagiriyappa, D. C. Hanumanthappa, C. T. Subbarayappa, and Stephan Peth
Springer International Publishing
Natarajan Mathimaran, Sekar Jegan, Matadadoddi Nanjundegowda Thimmegowda, Vaiyapuri Ramalingam Prabavathy, Perisamy Yuvaraj, Raju Kathiravan, Mohanur Natesan Sivakumar, Baiyapalli Narayanswamy Manjunatha, Nayakanahalli Chikkegowda Bhavitha, Ayyappa Sathish,et al.
Frontiers Media SA
Pigeon pea (Cajanus cajan) and finger millet (Eleusine coracana) are staple food crops for millions of the rural population in Asia and Africa. We tested, in field trials over three consecutive seasons at two sites in India, an intercropping and biofertilization scheme to boost their yields under low-input conditions. Pigeon pea seedlings were raised during the dry season and transplanted row-wise into fields of finger millet, and arbuscular mycorrhizal fungi (AMF) and plant growth-promoting rhizobacteria (Pseudomonas) were added alone or in combination to both pigeon pea and finger millet. Our major findings are (i) effects of the biofertilizers were particularly pronounced at the site of low fertility; (ii) dual inoculation of AMF+PGPR to finger millet and pigeon pea crops showed increased grain yields more effectively than single inoculation; (iii) the combined grain yields of finger millet and pigeon pea in intercropping increased up to +128% due to the biofertilizer application; (iv) compared to direct sowing, the transplanting system of pigeon pea increased their average grain yield up to 267% across site, and the yield gains due to biofertilization and the transplanting system were additive. These technologies thus offer a tool box for sustainable yield improvement of pigeon pea and finger millet.
A. Sathish, Vinay Kumar, and Ramakrishna Parama
Diva Enterprises Private Limited
A. Sathish, G.R. Maruthi Sankar, B.K. Ramachandrappa, and H.K. Ashoka
Informa UK Limited
ABSTRACT Based on a long-term finger millet-groundnut rotation study conducted for 24-years during 1992–2015 under Alfisols at Bangalore, organic and inorganic fertilizer effects on soil organic carbon (SOC) sequestration and sustainability of yield were assessed. Field experiments were conducted with T1:Control; T2:FYM@ 10t ha−1; T3:FYM@ 10t ha−1 + 50% NPK; T4:FYM@ 10t ha−1 + 100% NPK, and T5:100% recommended NPK in same plot every year. T5 comprised of 50 kg N, 50 kg P2O5 and 25 kg K2O ha−1 for finger millet and 25 kg N, 50 kg P2O5 and 25 kg K2O ha−1 for groundnut. Sustainability yield index of treatments was assessed using measurements made on variability of yield over years. The amount of carbon sequestered was assessed to identify a superior treatment for improving soil quality. Balanced use of 100% NPK+ FYM for maintenance of SOC at antecedent level with biomass-C of 1.62 Mg C ha−1 year−1 was feasible for sustaining production under semi-arid Alfisols.
V. Hatti, , B.K. Ramachandrappa, Mudalagiriyappa, A. Sathish, M.N. Thimmegowda, , , , and
Triveni Enterprises
A. Sathish, B.K. Ramachandrappa, K. Devaraja, M.S. Savitha, M.N. Thimme Gowda, and K.M. Prashanth
Diva Enterprises Private Limited
Knowledge of spatial variability in soil fertility is important for site-specific nutrient management. In this study, spatial variability in properties that influence soil fertility such as soil organic carbon (OC), available nitrogen (N), available phosphorus (P), available potassium (K) and secondary and micronutrients in surface soils (0–30 cm depth) of 67 farmers’ fields of Alanatha Cluster Villages, Kanakapura Taluk, Ramanagara District, Karnataka was quantified and the respective thematic maps were prepared on the basis of ratings of nutrients. Arc map with spatial analyst function of Arc GIS software was used to prepare soil fertility maps. Soils were strongly acidic to slightly acidic in reaction with normal electrical conductivity (EC). Soil OC content was low to high, available N low to medium and available P and available K low to high. The soil of sampled area were found to be 100 per cent sufficient in exchangeable calcium, 97 per cent area was found to be sufficient in exchangeable magnesium. Available sulphur status was found to be low to high. The entire area was found to be sufficient in available manganese and copper, 86.5 per cent area was sufficient in zinc and 85.0 per cent area was sufficient in iron in surface soils. The observed spatial variability in soil properties that influence soil fertility was used for deciding nutrient application to finger millet and groundnut. Thus, providing balanced nutrients to crops based on soil of fertility status resulted in enhanced crop productivity and net returns in both groundnut and finger millet cropping systems.
V. R. Ramakrishna Parama, A. Sathish, G. R. Maruthi Sankar, T. Chikkaramappa, Y. Shruti, G. P. Geetha, and H. M. Vinod Kumar
Informa UK Limited
ABSTRACT Assessment of soil-fertility of a sub-watershed is pre-requisite for efficient rainfed agriculture. Soil survey was conducted in Harve sub-watershed (Kumachahalli-1,Kumachahalli-2,KG Hundi,Kengaki,Bettadapura,Sagade micro-watersheds) to assess soil homogeneity. Based on analysis of soil-fertility data, pH had lowest, while manganese (Kumachahalli-1), magnesium (Kumachahalli-2,KG Hundi,Sagade), zinc (Kengaki), copper (Bettadapura) had highest variation. Principal component (PC) analysis indicated that 5 PCs explained 66.96% (Sagade)–74.08% (Kumachahalli-2) variance. Comparison of P1 and P2 indicated zinc (Kengaki), copper (Bettadapura), nitrogen, carbon (Kumachahalli-1); while P1 and P3 indicated carbon (Sagade), magnesium, calcium (Kumachahalli-2); P2 and P3 indicated carbon (Kengaki) as important with loading >0.70. Comparison of variation with P1 indicated pH (all locations), potassium (KG Hundi,Kengaki,Kumachahalli-2), electrical conductivity (Kumachahalli-2), carbon (Sagade); P2 indicated carbon, nitrogen (Kumachahalli-1); P3 indicated carbon (Kengaki), zinc (Sagade), calcium (Kumachahalli-2) as important. Kumachahalli-2 was superior with maximum soil homogeneity. The findings are useful for developing soil test-based fertilizer doses for crops under Alfisols.
I. Ramulu, B. K. Ramachandrappa, G. R. Maruthi Sankar, A. Sathish, M. Sandhya Kanthi, and A. M. Archana
Informa UK Limited
ABSTRACT Field experiments were conducted to assess changes in soil infiltration, water-holding capacity (WHC), bulk density and soil fertility with 15 custard apple (CA)-based systems of T1:CA+Fingermillet; T2:CA+Fodder Maize; T3:CA+Fieldbean; T4:CA+Niger; T5:CA+Chilli; T6:CA+Cowpea; T7:CA+Foxtailmillet; T8:Fingermillet; T9:Fodder Maize; T10:Fieldbean; T11:Niger; T12:Chilli; T13:Cowpea; T14:Foxtailmillet and T15:CA in 2012 and 2013 under semiarid Alfisols at Bangalore. T2 gave the maximum CA equivalent yield (1333 kgha−1), rainwater-use efficiency (4.90 kgha−1mm−1), net returns of Rs. 52690 ha−1 and a benefit-cost ratio of 2.92. T6 gave the maximum WHC of 41.0%; an infiltration rate of 33.1 cmhr−1; a cumulative infiltration of 66.2 cm; and a minimum bulk density of 1.40 gcc−1. T6 maintained maximum soil nitrogen (N) of 259 kgha−1; phosphorus pentoxide (P2O5) of 67.9 kgha−1; and potassium oxide (K2O) of 141.5 kgha −1; while T9 gave uptake N of 102.7 kgha−1; P2O5 of 24.6 kgha−1; and K2O of 103.7 kgha−1. T6 was efficient for improving the soil physical, chemical, and biological parameters based on the study.
A. Sathish, B. K. Ramachandrappa, M. A. Shankar, P. N. Srikanth Babu, CH. Srinivasarao, and K. L. Sharma
Wiley
In a 20‐yr‐old long‐term experiment, the impact of continuous application of organic manures and inorganic fertilizers on soil quality and the sustainability of finger millet production was conducted on two cropping systems: finger millet and finger millet–groundnut on an Alfisol of semi‐arid southern India. The study was conducted from 1992 to 2011 at the All India Coordinated Research Project for Dryland Agriculture, UAS, Bangalore, using a randomized block design. The treatments comprised of T1: control [no fertilizer and no farmyard manure (FYM) applied], T2: FYM 10 t/ha, T3: FYM 10 t/ha + 50% of recommended NPK (50:50:25 kg/ha), T4: FYM 10 t/ha + 100% of recommended NPK and T5: 100% recommended NPK. Comparison of long‐term yield data between treatments was used to calculate a ‘sustainability yield index’ (SYI), which was greatest for T4 (FYM 10 t/ha + 100% of recommended NPK), in both rotational (0.68) and monocropping (0.63) situations. Soil quality indices were determined using principal component analysis linear scoring functions. The key indicators which contributed to the soil quality index (SQI) under rotation were organic C; potentially available N; extractable P, K and S; exchangeable Ca and Mg; dehydrogenase activity and microbial biomass C and N. The largest SQI (7.29) was observed in T4 (FYM 10 t/ha + 100% NPK), and the smallest (3.70) SQI was for the control. Application of 10 t/ha FYM together with NPK (50:50:25 kg/ha) sustained a mean yield of 3884 kg/ha.
B. K. Ramachandrappa, G. R. Maruthi Sankar, A. Sathish, G. N. Dhanapal, M. A. Shankar, B. M. K. Raju, K. L. Sharma, M. Osman, G. Ravindra Chary, Ch. Srinivasa Rao,et al.
Informa UK Limited
ABSTRACT Field experiments were conducted in farmyard manure (FYM) and maize-residue (MR) blocks during 1984–2011 with the objective of identifying a superior treatment for attaining maximum finger millet yield and soil fertility at Bangalore. The treatments tested in the FYM block were Control; FYM@10tha−1; FYM@10tha−1 + 50% nitrogen, phosphorus, and potassium (NPK); FYM@10tha−1 + 100%NPK; 100%NPK; and in the MR block, Control; MR@5tha−1; MR@5t ha−1 + 50%NPK; MR@5tha−1 + 100%NPK; 100%NPK. FYM@10t/ha + 100%NPK gave a maximum mean yield of 3207 kg/ha in the FYM block, while MR@5t/ha + 100%NPK gave 2548 kg/ha in the MR block. Regression and principal component (PC) models of yield were developed through soil fertility and rainfall variables to assess the treatments. Maximum yield predictability of 60% and 65% under regression, and 76% and 75% under the PC model were observed for the FYM and MR blocks, respectively. FYM@10t/ha + 50%NPK was superior, with maximum gross returns of Rs.41286/ha and benefit–cost ratio (BCR) of 2.27 in the FYM block compared to MR@5t/ha + 100%NPK (gross returns of Rs.34530/ha and BCR of 2.09) in the MR block with maximum soil fertility, and are recommended for adoption under semi-arid Alfisols.
K. L. Sharma, B. K. Ramachandrappa, D. Suma Chandrika, A. Sathish, G. N. Dhanpal, Ch. Srinivasa Rao, M. A. Shankar, J. Kusuma Grace, G. R. Maruthi Sankar, G. Ravindra Chary,et al.
Informa UK Limited
ABSTRACT A long-term experiment was conducted to evaluate the effect of integrated use of organic and inorganic sources of nutrients on soil quality and its relation to finger millet yield under two predominant crop rotations viz., groundnut–finger millet and finger millet monocropping in hot moist semiarid rainfed Alfisol soils in South India. Two experiments were laid out separately for each cropping system in a randomized complete block design with five treatments individually with FYM and maize residue-based combinations viz., Control (T1), FYM @ 10t ha −1 or Maize residue (MR) @ 5t ha −1 (T2), farm yard manure (FYM) @ 10t ha −1 or Maize residue (MR) @ 5t ha −1 + 50% RDF (Recommended Fertiliser Dose) N, P2O5 & K2O (T3), FYM @ 10t ha −1 or Maize residue (MR) @ 5t ha −1 + 100% RDF N,P2O5 & K2O (T4), Recommended N, P2O5 & K2O (T5). Thus, four sets of nutrient management systems were evaluated. The results showed that farm yard manure or maize residue application in combination with recommended dose of fertilizer significantly improved the soil physical, chemical, and biological properties compared to control and application of inorganic fertilizers alone. Based on evaluation of 19 soil quality parameters under each of the four nutrient management systems, the common key soil quality indicators emerged out were: organic C (OC), available nitrogen (N), available sulfur (S), and mean weight diameter (MWD) of soil aggregates. A significant correlation between the finger millet yield and the relative soil quality indices (RSQI) indicates the importance of soil quality in these semiarid Alfisol soils. The results and the methodology adopted in the present study could be of importance in improving the soil quality not only for the region of the study, but also in other identical soils and cropping systems across the world.
Ramulu, B. K. Ramachandrappa, A. Sathish, Mudalagiriyappa, and H. V. Nanjappa
Gaurav Publications
An investigation was carried out to assess the performance of custard apple (CA) in an intercropping system in alfisols of dryland at the All India Co-ordinated Research Project for Dryland Agriculture, Gandhi Krishi Vignana Kendra, Bangalore during kharif 2012 and 2013. The experiment consisted of 15 treatments viz., T1: CA+Finger millet, T2: CA+Fodder maize, T3: CA+Field bean, T4: CA+Niger, T5: CA+Chilli, T6: CA+Cowpea, T7: CA+Foxtail millet, T8: Finger millet, T9: Fodder maize, T10: Field bean, T11: Niger, T12: Chilli, T13: Cowpea, T14: Foxtail millet and T15: Custard apple alone. Among these, custard apple alone recorded significantly higher plant height (197.7 cm), number of branches/plant(3.3), collar stem diameter (11.3 cm), canopy spread/plant (231.33), biomass (1675.4 kg/ha), leaf litter (315.7 kg/ha), number of fruits/plant (17.8), fruit weight (395 g), fruit size (102.4 cm), fruit volume (314.1 cc), total soluble solids (32.5%) and higher fruit yield (314.1 kg/ha) followed by custard apple intercropped with foxtail millet and cowpea.
A. Sathish and K. V. Niranjana
Springer Science and Business Media LLC