Open AccessSoil test based fertilizer prescriptions under integrated plant nutrient management system for carrot in an Inceptisol
Author(s) -
YV Singh
Publication year - 2021
Publication title -
annals of plant and soil research/annals of plant and soil research
Language(s) - English
Resource type - Journals
eISSN - 2347-6036
pISSN - 0972-1959
DOI - 10.47815/apsr.2021.10079
Subject(s) - inceptisol , fertilizer , nutrient , nutrient management , soil fertility , agronomy , mathematics , yield (engineering) , crop , field experiment , soil test , chemistry , environmental science , soil water , biology , soil science , materials science , organic chemistry , metallurgy
A field experiment was conducted at Agricultural Research Farm, Banaras Hindu University, Varanasi in an Inceptisol during rabi 2020-21 to develop a targeted yield equation for carrot crop. After developing three levels of fertility gradient with respect to available NPK in soil, the main experiment was conducted by taking carrot as a test crop. Initial soil data, carrot yield and NPK uptake by carrot crop were used for obtaining four important basic parameters, viz., nutrients required to produce a quintal of carrot roots (NR%), contribution of nutrients from fertilizers (CF%), contribution of nutrients from soil (CS%) and contribution of nutrients from organic matter (%C-OM). It was found that 0.65, 0.11 and 0.83 kg of N, P2O5 and K2O, respectively were required for producing one quintal carrot yield. The per cent contribution of nutrients from soil, fertilizer and FYM were 45.33, 65.91 and 67.26 for N; 58.45, 67.86 and 108.12 for P2O5 and 5.54, 3.35 and 10.53 for K2O, respectively. The ready reckoner for fertilizer doses with NPK alone and integrated use of NPK and FYM was also made using developed basic parameters for varying soil test values and desired yield targets of carrot yield.