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ACGF acreage acres agricul Agricultural Policy agricultural production Alternative Cash Grain alternative rotations American Journal Banos benefits Brown Planthopper CCBCB chemical Chile commodity complete protection Conservation Continuous Corn Conventional Tillage Corn-Beans crop rotations Development duction Dunkel Text Economic Threshold economic value Environment environmental costs estimates FACTA Faeth FAPRI farm income farming practices farming systems Grain With Fodder green manure groundwater health costs hectare herbicides impacts inorganic fertilizer Integrated Farm Integrated Pest Management IRRI irrigation labor Laguna land losses Ludhiana Manure ment natural control natural resource accounting Nebraska nomic Nueva Ecija Number off-site costs off-site damages organic payments peasant farmers Pennsylvania percent pesos Pesticide Philippines Pingali plant production practices production systems profitable Punjab Reduced Tillage Report resource-conserving rice production rice-wheat shadow prices soil depreciation soil erosion soil productivity Sustainable Agriculture Technical Annex Tillage tion U.S. Department wheat yields