The effects of sulphur (S) and nitrogen (N) on the growth, yield and quality of wheat were studied at The University of Agriculture, Peshawar during the year 2009-10. Randomized complete block design (RCBD) in split plot arrangement with N rates as main plot factor i.e., optimum N at sowing: 120 kg ha -1 , excessive N at sowing: 200 kg ha -1 , optimum split N at sowing and anthesis: 60-60 kg ha -1 , excessive split N at sowing and anthesis: 100,100 kg ha -1 and Soil and foliar applied S as subplot factor i.e., Untreated/control, soil S at stem extension: 20 kg ha -1 , foliar S at stem extension: 20 kg ha -1 , soil S at anthesis: 20 kg ha -1 , foliar S at anthesis: 20 kg ha -1 , foliar S at Stem extension and anthesis: 10,10 kg ha -1 were used. S application at stem extension (20 kg ha -1 ) either applied to soil or foliage of the crop caused greater grain yields irrespective of the dose of N application (optimum or excessive). The increased grain yields appeared to be the result of a higher number of spikes produced due to applied foliar S (20 kg ha -1 ) at stem extension or then it may be the result of a higher leaf area produced due to S (20 kg ha -1 ) application to the soil at stem extension. Sulphur at 20 kg ha -1 should be applied to the wheat crop at stem extension, either as foliar spray or to the soil alongside applications of an optimum dose of N, i.e., 120 kg ha -1 in order to improve both the quantity and quality of the produce.
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