Effect of Potash Levels and Plant Density on Potato Yield

Abstract

The research study effect of potash levels and plant density on potato yield was carried out during 2012 at New Developmental Farm Horticulture Section, University of Agriculture, Peshawar. Experiment was layout in split plot arrangement of the Randomized Complete Block Design while each treatment was repeated thrice. Four levels  of Sulphate of potash (SOP) i.e. 0.00, 50.00, 100.00 and 150.00 kg ha^-1and three plant spacing i.e. 15 cm, 25 cm and 35 cm were studied for different growth and yield parameters. Result showed that the tallest plant height (97.07 cm), highest number of tubers plant^-1 (8), the number of large  size tuber plot^-1 (37) and yield of large size tubers plot^-1 (6.5 t ha^-1) was recorded at 35 cm plant spacing. The highest number of tubers plot^-1 (82.25), number of medium size tuber (36.50), yield of medium size tuber (8.13 t ha^-1) and total yield (15.91 t ha^-1) were recorded at 25 cm plant spacing. The highest number of small size tuber plot^-1 (33.16) and  yield of small size tubers (4.52 t ha^-1) was recorded at 15 cm plant spacing , while the tallest  plant height (98.87 cm), maximum number of tubers plant^-1(6.85), number of tubers  plot^-1(88.66), highest number of small size tubersplot^-1 (28.77), medium size tubersplot^-1 (39.44), large size tubers plot^-1 (28), highest yield of small size tubers (3.55), medium size tubers (7.55), large size tubers (5.16 t ha^-1) and total tuber yield (16.27 t ha^-1) was recorded by using potash @ of 150 kg ha^-1. Result lead to the conclusion that the best  performance of potato crop were  recorded in most of  growth and yield parameter at 25 cm plant spacing with 150 kg potash ha^-1. Therefore, this production technology is recommended for the highest potato crop under the agro climatic condition of Peshawar.