IMPROVING WHEAT PRODUCTIVITY AND SOIL PHYSICAL PROPERTIES OF WATER ERODED AGRICULTURAL LAND THROUGH INTEGRATED PLANT NUTRITION
Cereal Crops Research Institute (CCRI), Pirsabak Nowshera, KPK, Pakistan
Improving soil fertility and crop productivity through integrated nutrient sources is a globally accepted practice. The reported study was conducted during 2014-15 for field investigations in the improvement of eroded soil’s physical characteristics and wheat crop productivity using integrated nutrient management techniques. The treatments contained combinations of NPK (% of the recommended dose 120:90:60 kg N: P2O5:K2O ḥa-1): FYM (t ha-1). Poultry manure (PM, (t ha-1) as; 0:0:0, 100%:0:0, 0:20:0, 25%:15:0, 50%:10:0, 75%:5:0, 0:0:10, 25%:0:7.5, 50%:0:5, 75%:0:2.5, 0:5:2.5, 25%:5:2.5, 50%:5:2.5 and 75%:5:2.5. Results revealed that 50%:5:2.5 combination of nutrient sources significantly (P ≤ 0.05) improved spike m-2 (by 34%), grains spike-1 (by 38%) and grain yield (by 90%) over the control treatment. Regarding soil physical properties, 0:20:0 combination reduced soil bulk density and improved available water, organic matter content and saturation water percentage at 0-15 cm soil depth. Positive correlation of soil organic matter was observed with available water (ṙ= 0.92) and saturation percentage (ṙ= 0.93) while it showed negative correlation with ṣoil bulk density (ṙ= -0.96). It was concluded that chemical fertilizer’s showed improvement in physical properties of eroded soil, however, the resultant production was significantly lagging behind to that achieved with integrated nutrient management. Under the current experimental conditions, 50%:5:2.5 combination of nutrient sources application restituted the physical properties of eroded soil and showed asset over rest of the integrated plant nutrients management (IPNM) and their applications.