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DEPTHWISE DISTRIBUTION OF EXTRACTABLE BORON IN SOME ACIDIC INCEPTISOLS OF INDIA

 

作者: BISWAPATI MANDAL,   DIPAK DE,  

 

期刊: Soil Science  (OVID Available online 1993)
卷期: Volume 155, issue 4  

页码: 256-262

 

ISSN:0038-075X

 

年代: 1993

 

出版商: OVID

 

数据来源: OVID

 

摘要:

We studied depthwise distribution of B extractable by tartaric acid (TA), ammonium acetate (AA), mannitol calcium chloride (MCC) and hot calcium chloride (HCC) in some acidic Inceptisols of West Bengal. The magnitude of B extraction follows: TA > HCC > AA > MCC and showed a decrease with an increase in soil depth. The highest value (with TA) is related to its ability for complexation with boric acid and maintenance of a low soil extract pH, while the lowest value (with MCC) is explained by the unlikely possibility of the presence of B as borate at acidic pH and, thus, the formation of B-mannitol complex. The decrease in extractable B with soil depth is attributed to the decrease in organic C and the increase in the Fe- and Mn-oxide content of the soils. Implications of the influences of soil properties on the extractable B content of soils are discussed.

 

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