Categorisation of districts based on nonexchangeable potassium : Implications of efficient K fertility management in Indian agriculture.
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Title |
Categorisation of districts based on nonexchangeable potassium : Implications of efficient K fertility management in Indian agriculture.
Categorisation of districts based on nonexchangeable potassium : Implications of efficient K fertility management in Indian agriculture. |
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Creator |
ICAR_CRIDA
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Subject |
imlification, efficient management, agriculture
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Description |
Not Available
Potassic fertilizer recommendations are made based on available (exchangeable + water soluble) K status of soils in different soil testing laboratories in India. However, recent studies employing a variety of measures of nonexchangeable K indicated a very substantial contribution of nonexchangeable fraction of soil K to crop K uptake. Present paper examines the information generated in the last 30 years on the status of nonexchangeable K in Indian soils, categorization of Indian soils based on exchangeable and nonexchangeable K fractions based on GIS mapping and K recommendations considering both the fractions of soil K. Inclusion of nonexchangeable K in the soil testing aids in predicting immediate K needs of crop plants as well as long term K needs of intensive cropping systems. Based on GIS based soil K fertility maps were prepared considering both exchangeable and nonexchangeable K, K deficient districts of the country were identified where K application is a must. Some maintenance dose of K is required in some districts where, exchangeable K is high but nonexchangeable K is low or medium. These GIS-based maps and suggested recommendations help to prioritize the K efficient zones where K application is essential and higher possibility exists for improving the K use efficiency. Special care should be taken on K fertilization on high K requirement crops like banana, sugarcane, potato Not Available |
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Date |
2020-02-25T08:58:08Z
2020-02-25T08:58:08Z 2010 |
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Type |
Technical Report
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/32860 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Srinivasa Rao, Ch, Subba Rao, A., Rao, K.V., Venkateswarlu, B.
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