Site-specific nutrient requirements of NPK for potato (Solanum tuberosum L.) in Western Indo-gangetic plains of India based on QUEFTS. (14th September 2018)

• Record Type: Journal Article
• Authors: Kumar, Prince; Dua, Vijay Kumar; Sharma, Jagdev; Byju, Gangadharan; Minhas, Joginder Singh; Chakrabarti, Swarup Kumar
• Is Part Of: Journal of plant nutrition. Volume 41:Number 15(2018)
• Page Start: 1988
• Page End: 2000
• Publication Date: 2018-09-14
• Subjects: internal efficiency -- NPK recommendation -- potato -- QUEFTS and tuber yield -- site-specific nutrient requirements; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2018.1484135
• Languages: English
• ISSNs: 0190-4167

Abstract

Abstract: Potato productivity in India is static due to unbalanced use of nutrients and intensive cropping system. Nutrient use efficiency and yield can be increased by application of nutrients based on quantitative approaches. We calibrated the quantitative evaluation of fertility of tropical soils (QUEFTS) model for the estimation of NPK requirements for different targeted yields of potato. Published data sets were used to calibrate the model. The results of the study showed that to produce one ton of potato tubers, 18, 4, and 24 kg N, P, and K, respectively, would be needed with internal efficiencies of 55, 285, and 42 kg tuber dry yield/kg N, P, and K removed. The observed yields of potato with different amount of nutrients were in agreement with the values predicted by the model. Therefore, the QUEFTS model based NPK fertilizer recommendations can be adopted for site-specific nutrient management of potato.