An experiment was conducted during the rabi seasons of 2018 and 2019 at Agricultural Research Station, Utukur, kadapa to study the effect of potassium and sulphur in addition to recommended nutrients of nitrogen and phosphorus on growth and yield of blackgram. The experiment was laid out in randomized block design with 11 treatments of different levels of nitrogen, phosphorus, potassium and sulphur. The results revealed that application of potassium and sulphur to rabi blackgram along with recommended dose of nitrogen and phosphorus influenced the plant height, number of branches per plant and pods per plant. Length of the pod, seeds per pod and 100 seed weight were not influenced by these nutrients. Application of 20-75-20-20 kg NPKS ha^-1 recorded higher seed yield of 2256 and 1904 kg ha^-1 in 2017 and 2018.

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