EFFECT OF DIFFERENT RATES OF NPK ON THE YIELD CONTRIBUTING TRAITS AND ECONOMICS OF WHEAT IN ROD KOHI AREA OF DERA ISMAIL KHAN DIVISION

A fertilizer trial on Daman-98 wheat variety was carried out on two variable textured soils of farmers’ fields in the hill-torrent irrigated area of Dera Ismail Khan Division, Pakistan during the years 2006-2007 and 2007-2008. The main objective of the research was to observe the impact factor of NPK (kg ha-1) viz T1 (0-0-0), T2 (20-0-0), T3 (40-20-0), T4 (40-20-10), T5 (60-30-20), T6 (80-40-30) and T7 (100-50-40) in terms of plant height (cm), grain yield (kg ha-1) and fertilizer economy. The experiment was carried out in Randomized Complete Design with three replications. The result showed that all the yield contributing traits (i.e plant height, grain yield and economics of wheat) were significantly influenced by different levels of NPK applications. The yield parameters increased with an increase in each fertilizer nutrient (N, P, K) during both the years. Best fertilizer economy (maximum benefit ha-1 ) was received from T6 followed by T7. The increase in grain yield ha-1 due to NPK application was more on loamy soil than on clay loam soil. Likewise greater values of all parameters were found during 2007-08 as compared to 2006-07, which may be attributed to residual effect of NPK application accompanied by favorable climatic condition during 2nd year of growing wheat crop.