Integrated Nutrient Management (Inm) for Hybrid Maize Grown in Calcareous Soil

Abstract

for a period of three years (2007-2009) to find out the effect of integrated nutrient management on productivity of hybrid maize. Conjunctive use of 100% NPK + 5 t ha-1 poultry manure recorded significantly highest grain and stover yields. Integration of 100% NPK with FYM and micronutrients viz., zinc and iron recorded higher yield than the treatment that received 100% NPK + poultry manure + ZnSO4 + FeSO4. The lowest yield of 5637 kg ha-1 was recorded in the treatment that received 100% NPK. The uptake of macronutrients by hybrid maize increased with increase in NPK levels. The organic carbon, available N and K status of soil improved due to the application of 100% NPK + 5 t ha-1 poultry manure while the available P status was increased with 75% NPK + 5 t ha-1 poultry manure. The highest benefit : cost ratio (2.52) was obtained with the application of 100% NPK + FYM + ZnSO4 + FeSO4.

Validation of Soil Test and Yield Target Based Balanced Fertilizer Prescription Model for Rainfed Maize on Inceptisol

“…Statistical scrutiny of yield data from the six locations revealed that STCR -IPNS-6.0 t ha -1 had recorded significantly higher grain yield and it was on par with STCR -IPNS-5.0 t ha -1 and STCR-NPK alone-6.0 t ha -1 ; whereas, blanket recommendation recorded significantly lower yield over STCR treatments. Similar findings indicated that application of inorganic fertilizer along with organic manures recorded higher grain and straw yield (Kaleeswari et al, 2011). This could also be due to the integrated use of organic manures with chemical fertilizers, which could have resulted in increased available nutrient status over sole use of chemical fertilizers (Kaleeswari et al, 2011;Shah et al, 2013) ultimately resulting in higher uptake (Sathish et al 2011) and increased use efficiency of nutrients (Jat et al, 2014).…”

“…Similar findings indicated that application of inorganic fertilizer along with organic manures recorded higher grain and straw yield (Kaleeswari et al, 2011). This could also be due to the integrated use of organic manures with chemical fertilizers, which could have resulted in increased available nutrient status over sole use of chemical fertilizers (Kaleeswari et al, 2011;Shah et al, 2013) ultimately resulting in higher uptake (Sathish et al 2011) and increased use efficiency of nutrients (Jat et al, 2014).…”