Effect of sulphur supplementation on growth and yield of blackgram in Typic Rhodustalf

The effect of soil and foliar application of sulphur was investigated on blackgram in Typic Rhodustalf of pulses growing areas of Madurai district. The field experiment was laid out in a randomised block design with recommended doses of fertiliser with two levels of different sulphur sources as gypsum, ammonium sulphate and potassium sulphate which were supplied through soil and foliar application. The growth and yield components of blackgram were significantly increased viz plant height (54.7cm), number of leaves per plant (53), number of pods per plant (35), number of seeds per pod (7), 100grain weight (4.81 g), dry matter production (2832 kg/ha), grain yield (1145 kg/ha) and haulm yield (1645 kg/ha). Among the treatments application of 100 per cent recommended dose of fertiliser (RDF) with potassium sulphate 20 kg/ha plus foliar spray of 0.5 per cent K₂SO₄ increased the growth and yield components of blackgram.