Journal of Pure and Applied MicrobiologyVol. 9 No. 4

Validation of Soil Test Based Fertilizer Prescription Model under Integrated Plant Nutrient Management System for Maize in an Inceptisol of Varanasi, India

Manoj Parihar1, Y.V. Singh1*, Pradip Dey2 and Lokesh Kumar Jat1

1AICRP on STCR, Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi - 221005, India. 2Project coordinator STCR (AICRP), Indian Institute of Soil Science, Bhopal - 462 038, India.

Received on 20 April 2015 and accepted on 15 July 2015



Studies on Soil test Crop Response based Integrated Plant Nutrient Management System (STCR - IPNMS) were conducted for the desired yield targets of maize, on Inceptisol of Agricultural Research Farm, Banaras Hindu University, Varanasi during kharif 2012. Testing of developed fertilizer prescription equation is necessary to demonstrate the effectiveness of technology delivery to the stake holders in need. To assess the validation of fertilizer prescription a series of experiment was setup in four location of eastern plain zone of utter Pradesh. Soils of the selected location are analyzed initially for available N, P and K. Treatments include control, farmer practices, general recommended dose of fertilizer and STCR based fertilizer dose for an yield target of 30 and 35 q ha-1 with 5 t ha-1 FYM. The treatments were imposed and cultivation practices were carried out periodically and the grain yield was recorded at harvest. Using the data on grain yield and fertilizer doses applied, per cent increment in yield and benefit cost ratio (B:C) were worked out. The results of the experiments indicated that in all the four locations, the per cent achievement of the targeted yield was within?10% variation proving the validity of the equations for prescribing integrated fertilizer doses for maize. The highest per cent increment in yield was recorded in the yield target of 35 q ha-1 (51.27 percent) followed by 30 q ha-1 (31.43 percent) over farmer?s practice. The highest mean grain yield was recorded in STCR-IPNMS?35 q ha-1 (4008 kg ha-1). The highest benefit: cost ratio (4.44) was recorded in STCR-IPNMS 30 q ha-1 is followed by STCR-IPNMS 35 q ha-1 (3.58). The fertilizer prescription equations developed for maize under IPNMS can be recommended for alluvial Inceptisol of eastern Utter Pradesh for achieving a yield target of 30 q ha-1 with higher economic return.

Keywords : Fertilizer prescription, STCR-IPNMS, Maize, B:C Ratio, yield target etc.