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Potassium in shrink-swell soils of India.

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Title Potassium in shrink-swell soils of India.
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Creator Priya P. Gurav,
S.K. Ray,
P.L. Choudhari,
A.O. Shirale,
B.P. Meena,
A.K. Biswas,
A.K. Patra.
 
Subject clay mineralogy, fertilizers, potassium availability, shrink-swell soils
 
Description Not Available
This article critically reviews the information regarding potassium (K) status of Indian soils based on research conducted since 1929. The patterns and lacunae regarding potassium consumption in India are also mentioned. The role of minerals in potassium availability vis-à-vis forms of potassium is discussed and elucidated with suitable clay mineralogical evi- dences. The article also highlights concepts of
potassium availability to plants in Indian shrink-swell soils. Authors have pointed out the inefficacy of the universal method used for assessing plant-available K (1N NH4OAc) in Indian shrink-swell soil, as observed from extensive K response studies. The current practicesof assessing only plant available K arenot adequate to detect native changes in soil potassium. This paradoxical situation necessitates revision and revalidation of the existing potassium fertilizer rec- ommendations, which are being adopted since four decades. A holistic research envisaging soil test crop response and mineralogical studies will help in revising potassium evaluation methods in India,leading to judicious fertilizer application by the farmers.
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Date 2020-05-21T09:42:34Z
2020-05-21T09:42:34Z
2019-08-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/36022
 
Language English
 
Relation Not Available;
 
Publisher Current Science Association in collaboration with the Indian Academy of Sciences