Soil test crop response based gradient experiment on rice (Oryza sativa L.) to NPK fertilizers in the alluvial soil of the Indo- Gangetic plains

To found the effect of N, P and K fertilizers on chickpea, a gradient experiment
was conducted at Agricultural Research Farm, Institute of Agricultural Sciences, Banaras
Hindu University, Varanasi. Uttar Pradesh, India, during 2013-14. N0P0K0, N1P1K1 and
N2P2K2 fertilizer levels were applied to strip I, II and III, respectively. NPK were applied
through urea, single super phosphate and muriate of potash fertilizers, respectively. Rice
cv. Malviya Dhan-36 was grown as a gradient crop. At harvest, plant samples were collected
and analyzed for NPK content and calculated uptake of nutrients. Grain and straw yields
of rice were also recorded. The results revealed that an application of graded levels of NPK
fertilizers significantly influenced NPK uptake, grain and straw yields of rice crop.