9 research outputs found
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No full textNot AvailableA fixed-plot field experiment was conducted since 2005 to study the long-term effect of nutrients on the
productivity, soil fertility, nutrient uptake and nutrient-use efficiency of castor (Ricinus communis L.) in castorsorghum (Sorghum bicolor) cropping system in rainfed Alfisols of Andhra Pradesh. Application of recommended dose offertilizers, RDF (60-40-30 kg NPK/ha) + 5 t/ha farm yard manure (FYM) recorded significantly higher yield attributes, seed (1645 kg/ha) and oil yield (817 kg/ha) of castor compared to RDF (1306 kg/ha) but was comparable with integrated use of 75 % NPK + 25 % N through FYM (1427 kg/ha). Imbalanced application of N alone or NP or 50 % NPK and control plots recorded significantly the lowest castor seed yields. At the end of six years of cropping (2011), the treatment RDF-NPK + 5 t/ha FYM significantly improved the soil organic carbon (0.38 %) and resulted in a positive balance of 42, 12.4 and 80 kg/ha of available soil N, P and K besides improving the nutrient uptake of castor (65.1, 10.63 and 33.2 kg/ha of N, P and K, respectively). Agronomic efficiency of nutrients (N, P and K) was found higher in the treatment, 75 % RDF + 25 % N through FYM. However, apparent recovery of N, P and K was highest in NPK + 5 t/ha FYM treatment.Not Availabl
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No full textNot AvailableA field experiment was conducted for 6 years during 2005-10 to study the effect of nutrient management practices on the productivity, economics and soil fertility of castor (Ricinus communis L.) - sorghum (Sorghum bicolor (L.) Moench.) cropping system in rainfed Alfisols of southern Telangana region of Andhra Pradesh. Application of recommended dose of NPK for castor (60-40-30 kg/ha) recorded higher seed yield (1 614 kg/ha) which was comparable with NPK + 5 tonnes FYM/ha (1 589 kg/ha) and 75 % NPK + 25 % N through FYM (1 512 kg/ha). Whereas for sorghum, recommended NPK (60-30-30 kg/ha) + 5 tonnes FYM/ha recorded higher sorghum seed yield (3 147 kg/ha) which was comparable with the treatment, recommended dose of NPK (2 718 kg/ha) and 75% NPK + 25% N through FYM (2 696 kg/ha). Imbalanced application of N alone or NP or 50 % NPK and control plots recorded significantly the lowest seed yields of both crops. Response to zinc application was observed only in third crop cycle of sorghum. The system productivity in terms of castor equivalent yield (CEY) was the highest in NPK + 5 tonnes FYM/ha treatment (2 847 kg/ha) which was 84.3 % higher than the control (1 544 kg/ha). This treatment recorded the maximum gross returns (Rupees 71 175 /ha), net returns (Rupees 45 025 /ha)and benefit cost ratio (2.72). At the end of 3 cropping cycles (6 years), the treatment receiving NPK + 5 tonnes FYM/ha significantly improved the soil available N, P, K, organic carbon and micro nutrient (Fe, Mn and Zn) status compared to control or imbalanced fertilizer treatments.Not Availabl
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No full textNot AvailableA field experiment was conducted to determine the effect of fertiliser N on seed fatty acid composition
(palmitic, stearic, oleic and linoleic acid content) of sesame. Nitrogen (N) application had a profound effect on the
fatty acid composition. An increase in N application from 0 to 45 kg/ha increased linoleic acid but reduced oleic acid
and palmitic acid contentsNot Availabl
