1 © 2014 Conscientia Beam. All Rights Reserved. EFFECT OF DIFFERENT SOURCES OF FERTILIZERS ON THE YIELD AND YIELD COMPONENTS OF WHEAT VARIETY KOHAT-2000 UNDER RAINFED CONDITIONS OF KOHAT DURING 2012 Sabir Gul Khattak 1 --- Zahid Saleem 2 --- Muhammad Ilyas 3 --- Niaz Muhammad 4 --- Javed Iqbal 5 --- Muhammad Khan 6 --- Zahid Iqbal 7 --- Fahim Ullah Khan 8 1,2,3,4,5,6,7,8 Barani Agricultural Research Station Kohat ABSTRACT Experimental site had pH value of 7.44 with electrical conductivity of 0.14 dS/cm. Soil was alkaline, strongly calcareous (21.25% CaCO3), deficient in organic matter, nitrogen & phosphorus and adequate in potassium. It has no problem of salinity and is clay loam in texture. The grain yield was significantly increased due to different fertilizer combinations. The highest grain yield of 2133 kg ha-1was recorded by applying Nitrophos+UREA+K2SO4 @ 90-60-30 kg ha-1 followed by 1933 and 1900 kg ha-1 obtained by applying DAP+ Ammonium sulfate+ Potassium sulfate combinations and DAP+URAE+K2SO4combinations respectively. Keywords: Wheat, Rainfed, Fertlizer doses, Yield, Yield component, Kohat-2000. 1. INTRODUCTION Soil is main reserve and store of nutrients for crops and trees which is major natural source of supplying food and shelter to mankind. The population in Pakistan is increasing at an alarming rate of more than 3%, which is putting further pressure on this natural resource. With the continuous cropping, soil losses its native fertility and the goal of self-sufficiency can’t be obtained without the addition of chemical fertilizers. In the process of Agricultural Development, during the past about 63 years, the major break through of high yielding varieties of cereals coupled with higher rates of fertilizer application and other technological aspects like use of herbicides for control of weeds and insecticides for insect pests. These aspects have created concerns about their impact on environment. Worries about the accumulation of nitrates in drinking water and possible pesticide residues in our food supply have caused many people to question the value of major tool of modern agriculture. A nutrient imbalance exists when one or more nutrients are not in applied in proper ratio. This can cause deficiency, toxic level of one or more nutrients or just excess of a nutrient that is Current Research in Agricultural Sciences 2014 Vol. 1, No. 1, pp. 1-5 ISSN(e): 2312-6418 ISSN(p): 2313-3716 © 2014 Conscientia Beam. All Rights Reserved.