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ASSESSMENT OF PERMISSIBLE SOIL LOSS IN INDIA EMPLOYING A QUANTATIVE BIO- PHYSICAL METHOD

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Title ASSESSMENT OF PERMISSIBLE SOIL LOSS IN INDIA EMPLOYING A QUANTATIVE BIO- PHYSICAL METHOD
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Creator D MANDAL
VN SHARDA
 
Subject BIOPHYSICAL MODEL, CONSERVATION PLANNING, PERMISSIBLE EROSION, SOIL DEGRADATION, SOIL SUSTAINABILITY
 
Description Not Available
SOIL DEGRADATION IN ALL ITS NEFARIOUS FORMS HAS SERIOUS REPERCUSSIONS ON CROP AND BIOMASS PRODUCTIVITY . ASSESSMENT OF SOIL LOSS TOLERANCE LIMITS ( SLTLs) ( PERMISSIBLE SOIL LOSS) SERVES AS A TOOL TO GAUGE THE POTENTIAL EROSION RISK IN A GIVEN AREA WITH REGARD TO LONG- TERM SUSTAINABILITY. IN THIS COMMUNICATION, SLTLs IN DIFFERENT STATES IN INDIA AND AT THE NATIONAL LEVEL HAVE QUANTITATIVELY ESTIMATED BY EMPLOYING A BIO- PHYSICAL MODEL BASED UPON INTEGRATION OF RELEVANT ATTRIBUTES. THE ANALYSIS HAS INDICATED THAT SOIL LOSS TOLERANCE OR T- VALUES VARIES FROM 2.5 TO 12.5 Mg ha-1 yr-1 DEPENDING UPON SOIL QUALITY GOVERNING SOIL RESISTIBILITY TO EROSION AND DEPTH AT A PARTICULAR LOCATION. ABOUT 57% OF THE AREA IN THE COUNTRY HAS PERMISSIBLE SOIL LOSS OF LESS THAN 10.0 Mg ha-1 yr-1 , WHICH NEEDS TO BE TREATED WITH APPROPRIATE CONSERVATION MEASURES. HIGHEST PRIORITY NEEDS TO BE ACCORDED TO ABOUT 7.5% AREA WHERE THE T- VALUE IS ONLY 2.5 Mg ha-1 yr-1 DUE TO SOIL QUALITY CONSTRAINTS. THE METHODOLOGY AND FRAMEWORK DEVELOPED FOR ESTIMATING T- VALUES HAS THE POTENTIAL TO BE APPLIED IN DIFFERENT REGIONS OR COUNTRIES OF THE WORLD. THE RELATIVE EFFICACY OF THE PRESENT METHOD WAS TESTED WITH PRODUCTIVITY INDEX- BASED APPROACH. CASE STUDY EVIDENCES IN DIFFERENT WATERSHEDS REVEALED THAT SOIL PRODUCTIVITY CAN BE MAINTAINED AT SUSTAINABLE LEVELS BY BRINGING THE EROSION RATE WITHIN TOLERANCE LIMIT.
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Date 2021-02-01T04:41:47Z
2021-02-01T04:41:47Z
2011-02-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/45165
 
Language English
 
Relation Not Available;
 
Publisher Not Available