Binod P. Luitel, Bhim B. Khatri, Surendra L. Shrestha and Tika R. Chapagain

DOI

ABSTRACT

This study was carried out to investigate the response of potato cv. Kufri Jyoti to different levels of nitrogen and potash at Agriculture Research Station (ARS), Pakhribas, Dhankuta during 2003/04-2005/06. Four levels of each nitrogen (0, 50, 100, and 150 kg/ha) and potash (0, 30, 60 and 90 kg/ha) having sixteen treatments were allocated in Factorial Randomized Complete Block Design with three replications. Nutrient status of the experimental site was low nitrogen (0.007%), high phosphorous (171 kg/ha), low potash (81 kg/ha), medium organic matter content (1.6%) and moderately acidic soil (pH 4.6) with sandy loam soil texture. Phosphorous and farmyard manure were applied in all the plots at the rate of 100 kg and 20 tons per hectare, respectively. Ground foliage development, stem number per plant and plant height were statistically at par at 100 and 150 kg N. Undersize tuber weight (%) decreased as the level of nitrogen increased. Effect of potassium fertilizer on plant morphological characters, tuber fractions and total tuber number was non-significant. Nitrogen at 100 kg and potassium at 60 kg/ha gave the better yield under on-station condition at Pakhribas. Further research is recommended to conduct the farmer's field condition in order to corroborate the on-station's research results.