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OpenAGRICOLA

U.S. Department of Agriculture

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soil conservation2
soil nutrients2
water erosion2
world wide web2
Conservation projects (Natural resources)1
Environmental monitoring1
Internet1
Triticum aestivum1
USDA1
Vertisols1
Watershed management1
Zea mays1
agricultural history1
agricultural land1
agricultural management models1
agricultural soils1
agricultural statistics1
agroecosystems1
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