1Central Potato Research Institute, Shimla, Himachal Pradesh, 171 001
2Central Potato Research Station, Jalandhar, 144 003, Punjab, India
3Central Potato Research Station, Patna-801506, AICRP (Potato)
4AICRP (Potato), CCS HAU, Hisar, Haryana, 125 004
5AICRP (Potato), JNKVV, Regional Agril. Research Station, Chhindwara, Madhya Pradesh, 480 001
6Central Potato Research Station, PO Muthorai-643 004, TN
7AICRP (Potato), Potato Research Station, SKDAU, Deesa, Gujarat, 385 535
8AICRP (Potato), Agricultural Research Station (MPUA&T), Kota-324 001, (Rajasthan)
9AICRP (Potato), Agricultural Research Station (MPUA&T), Kota-324 001, Rajasthan
10AICRP (Potato), Bidhan Chandra Krishi Vishwavidyalaya, Kalyani-741 235, West Bengal
11AICRP (Potato), GBPUA&T, Pantnagar, Uttarakhand, 263 145
12AICRP (Potato), GBPUA&T, Pantnagar, Uttarakhand, 263 145
13AICRP (Potato), Assam Agricultural University, Jorhat, 785013
Online published on 29 March, 2016.
Field experiments were conducted at twelve centers of All India Coordinated Research Project on Potato representing different agro climatic zone to find out suitable dose of P in potato based on soil test during 2005–06 and 2006–07. Four treatments consisting of combinations of different levels of P based on soil test used in the study showed significant effect on yield of potato. Results revealed that soil having low P availability (= 10 ppm) responded to P fertilizers and there was a need of P application at all these centers 100–125% recommended dose of P gave best tuber yield and also net returns. In case of medium P availability soils (10 to 22 ppm), the 50–100% recommended dose of P fertilizer was found to meet P need of the crop and gave higher yield and also net returns. In case of high P status soils (= 20ppm), application of P did not respond by increased yield and 25% of recommended dose of P as maintenance dose in the soils with > 20 ppm P gave maximum tuber yield. The results clearly indicate that P may be applied based on soil test value across different agro climatic zone to economize P dose.
phosphorus application, soil test, potato, agroclimatic zone
