Effect of Nitrogen and Phosphorus Fertilization on Recovery and Nutrient Uptake By Potato Crop Gupta A.1, Agronomist, Saxena M. C.2, Agronomist Agriculture College, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar (Nainital) 1Indian Institute of Horticultural Research, 255, Upper Palace Orchards, Bangalore-560 080. 2I. C. A. R. D. A., Aleppo, Syria. Summary Effect of different levels of nitrogen (0, 60, 120, 180 and 240 kg N/ha) and phosphorus (0, 60, 120 and 180 kg P2O6/ha) fertilization on nutrient uptake and recovery in ‘Kufri Sindhuri’ potato (Solatium tuberosum L.) was studied on loam soils at Pantnagar (U. P.) in winter seasons of 1968–69 and 1969–70. Nitrogen application increased the nitrogen, phosphorus and potassium uptake. Phosphorus application increased nitrogen and phosphorus uptake only slightly but did not affect the potassium uptake. The total nutrient uptake by the crop at maximum yield levels of nitrogen fertilization (120 and 180 kg N/ha) was 156.2 and 203.4 kg N per ha, 25.3 and 26.1 kg P per ha and 232.5 and 253.1 kg K per ha during 1968–69 and 1969–70 respectively. The increasing levels of nitrogen or phosphorus decreased their recovery. Recovery of nitrogen was more than 50 per cent at the maximum yield levels of nitrogen. The recovery of phosphorus was much lower than the recovery of nitrogen. Top |