Field studies conducted during 1989–90 on brown hill soils of Shimla (Palehumults) revealed a non-significant interaction between P and S in potato cv. ‘Kufri Jyoti’ under rainfed conditions. Significant responses to P and S were obtained at 22 kg ha−1 in both the years. Combined application of P and S was found better than their individual application and gave 2030% higher tuber yield and nutrient uptake by tubers. Applied P and S had a positive effect on nutrient recovery from applied fertilizers. Both P and S had a positive effect on P and S content in leaves. P/S ratio varied from 0.81 in years of normal rainfall to 1.25 in years of high rainfall. P/S ratio showed a negative but significant association with tuber yield (−0.85**), P uptake (−0.61 **) in soils with high P content. There was a close association between leaf S content and tuber yield (0.89**) whereas a negative association existed between P content in leaf and tuber yield (−0.47*).
