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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2017 , Volume 5, Issue 2
Page No. : 1144-1152
Article doi: : http://dx.doi.org/10.18782/2320-7051.2867
Depletion and Contribution Pattern of Available Potassium in Indian Coastal Soils under Intensive Cropping and Fertilization
Ranajit Panda* and S. K. Patra
Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741 252, West Bengal, India
*Corresponding Author E-mail: ranajitpanda85@gmail.com
Received: 19.04.2017 | Revised: 28.04.2017 | Accepted: 29.04.2017
ABSTRACT
A pot experiment was conducted in four representative coastal soils of West Bengal to assess the depletion of available K through exhaustive cropping with two cycles of crop rotation viz., paddy-greengram-sunflower under no-fertilizer (control), NP, K and NPK treatments. There was steady decline of soil available K with or without fertilization due to removal of K by successive crops. Application of NP increased and K decreased the depletion of available K in soils, while the effect of NPK was intermediate. The magnitude of depletion in available K was much higher in soil having low K reserves and vice versa. However, for sustaining crop productivity and maintenance of soil K fertility level, application of moderate dose of K fertilizer at regular interval is needed in the intensive cropping programme.
Keyword: Intensive cropping, K-Depletion, K-Fertilization.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782/2320-7051.2867
Cite this article:
Panda, R. and Patra, S.K., Depletion and Contribution Pattern of Available Potassium in Indian Coastal Soils under Intensive Cropping and Fertilization, Int. J. Pure App. Biosci. 5(2): 1144-1152 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2867
