ADJUSTED T VALUES FOR CONSERVATION PLANNING IN NORTHWEST HIMALAYAS OF INDIA
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Title |
ADJUSTED T VALUES FOR CONSERVATION PLANNING IN NORTHWEST HIMALAYAS OF INDIA
Not Available |
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Creator |
D MANDAL
KS DADHWAL OPS KHOLA BL DHYANI |
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Subject |
EROSION CONTROL REGULATION, EROSION TOLERANCE, QUANTITATIVE APPROACH, SOIL GROUPING, T- VALUE
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Description |
Not Available
TOLERANCE SOIL LOSS(T) IS DEFINED AS THE MAXIMUM RATE OF ANNUAL SOIL EROSION THAT ECONOMICALLY AND INDEFINITELY WILL CONTINUE TO SUSTAIN A HIGH LEVEL OF CROP PRODUCTIVITY . CURRENTLY A T VALUE IS ASSIGNED TO A SOIL BASED ON ITS CURRENT FUNCTIONAL STATE AND STRUCTURAL INTEGRITY . HOWEVER, IN INDIA A DEFAULT T VALUE OF 11.2 Mg ha-1 yr-1 (5.0 t ac-1 yr-1) IS BEING FOLLOWED. OUR OBJECTIVE IS TO PROVIDE ADJUSTED T VALUES OF INDIA'S NORTHWEST HIMALAYAN REGION BY INCORPORATING BULK DENSITY, WATER STABLE AGGREGATE MEASUREMENTS , INFILTRATION RATE , SOIL CARBON AND FERTILITY STATUS INTO ASSESSMENT. A QUANTITATIVE MODEL WAS USED TO SUM UP OVERALL SOIL PERFORMANCE TO DEFINE THE CURRENT STATE OF SOIL RESOURCE. SCALING FUNCTIONS WERE USED TO CONVERT SOIL PARAMETERS TO A 0 TO 1 SCALE. THE NORMALISED VALUES WERE THEN MULTIPLIED BY APROPRIATE WEIGHTING FACTORS BASED ON A RELATIVE IMPORTANCE AND SENSITIVITY ANALYSIS OF EACH INDICATOR. A CATEGORIAL RANKING OF SOIL 1,2, 3 WAS GIVEN TO SOIL GROUP BASED ON THE OVERALL ASSESSMENT. A GENERAL GUIDELINE DEVELOPED BY THE USDA . NATURAL RESOURCE CONSERVATION SERVICE WAS FOLLOWED TO CALCULATE SOIL LOSS TOLERANCE FOR EACH SOIL GROUP USING EFFECTIVE SOIL DEPTH. ADJUSTED T VALUES FOR THE AREA RANGED BETWEEN 5.0 AND 12.5 mg ha-1 yr-1 ( 2.2 AND 5.6 T AC-1YR-1) COMPARED TO 11.2 MG HA-YR-1 (5.0 T AC-1YR-1). USE OF THE ADJUSTED T VALUES WILL IMPROVE CONSERVATION PLANNING, HELP MEET EROSION CONTROL REGULATIONS FOR DEVELOPMENT OF SUSTAINABLE FARM OPERATIONS , AND IMPROVE WATERSHED MANAGEMENT IN THIS PORTION OF INDIA. Not Available |
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Date |
2021-02-01T04:37:02Z
2021-02-01T04:37:02Z 2012-01-01 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/45164 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Not Available
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