• Y.Y. Giri
• D.V. Ramana Reddy

A maize experiment was conducted in an alfisol at Hyderabad with 21 NPK treatments and vermi compost (VC) for deriving soil test based fertilizer doses for attaining yield targets. Treatments consisted of 4 levels of N @ 0, 60, 120, 180; P2O5 @ 0, 30, 60, 90; K2O @ 0, 20, 40, 60 kg/ha and VC @ 0, 2.5 and 5 t/ha. The treatments comprised of 18 fertilized and 3 unfertilized (control) combinations of N, P2O5, K2O and VC (Randomized Block Design). Based on fertilizer effects on yield, soil and plant nutrients, nutrient requirement (NR), contribution from soil (SE), fertilizer (FE) and vermi compost (VCE) were derived. Using this basic data i.e., NR, SE, FE and VCE, fertilizer adjustment equations were derived for prescribing phosphorus doses based on soil test values of phosphorus for attaining yield targets. There was considerable reduction in the quantities of fertilizer P2O5 due to IPNS.

STCR, maize, fertilizer adjustment equations, FP prescriptions

"Phosphorus recommendation for yield targets of kharif maize based on soil test crop response studies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 3, page no.778-780, March-2015, Available :http://www.jetir.org/papers/JETIR1503075.pdf

"Phosphorus recommendation for yield targets of kharif maize based on soil test crop response studies", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 3, page no. pp778-780, March-2015, Available at : http://www.jetir.org/papers/JETIR1503075.pdf