Influence of Chickpea to Different Levels of Phosphorous and Sulphur under Rainfed Conditions

  • Tariq Shah


Appropriate fertilizer use is imperative to acquire highest crop yield. It is very essential to find out best level of each nutrient appliance as there might be affirmative synergistic or depressing antagonistic interaction among them. A field research was performed at Agriculture Research Station Harichand Pakistan for two years to evaluate seed yield agronomic efficacy and recovery of nutrient by chickpea Cicer arietinum L.. The treatments involves three levels 0 50 and 100 kg P2O5 ha-1 of phosphorus and three levels 0 20 and 40 kg S ha-1 of sulphur from the two sulphur sources gypsum and ammonium sulphate in diverse combinations. The assessment was put down according to randomized complete block design with the split-split plot arrangement. Seed yield was significantly increased by the fertilization of phosphorous and sulphur by 30 and 13 against control respectively. The economic optimal amount of phosphorus and sulphur as estimated from quadratic response equations ranged from 57 to 59 and 33 to 54 kg ha-1 correspondingly. Consequence of pooled application of phosphorus and sulphur was synergistic at the both nutrient fertilization rates of P40S15 and P100S40. Agronomic efficacy and recovery of sulphur were elevated due to pooled application of phosphorus and sulphur as over the individual ones. Phosphorus recovery was elevated at inferior level of phosphorus 50 kg P2O5 ha-1 in contrast to superior level 100 kg P2O5 ha-1. The value cost ratio was fewer than 2 for sole application of superior level of phosphorus. The fertilization level of P100S40 was more economic and cost effective.