Agriculture --7 -- Animals -- 10 -- Barriers -- 13 -- Best Management Practices -- 17 -- Brush -- 17 -- Chemicals, Agricultural (Restrictions on Use) -- 19 -- Climate -- 19 -- Competition -- 28 -- Conservation -- 30 -- Construction Activities Other Than Agricultural -- 31 -- Contour -- 34 -- Crop -- 34 -- Cropping System/Sequence -- 38 -- Crops -- 48 -- Desertification -- 53 -- Desert Torrent -- 53 -- Direct Seeding -- 54 -- Drill/Planter Type -- 54 -- Dryland Farming -- 54 -- Earthworms -- 55 -- Environment -- 55 -- Eroded Sites/Conditions -- 56 -- Erodibility -- 59 -- Erosion -- 59 -- Erosion Prediction -- 69 -- Erosivity -- 70 -- Evaporation -- 70 -- Evapotranspiration -- 70 -- Exploitation of Natural Resources -- 71 -- Farm Size (Farmer Resources) -- 72 -- Fences -- 72 -- Field Length and Width -- 72 -- Financial Aspects -- 73 -- Forest -- 76 -- Freeze-Thaw Cycle -- 77 -- Genetic Engineering -- 78 -- Genetics (Improved Crops) -- 78 -- Governmental Factors -- 79 -- Grass Cover in Planted Crops -- 82 -- Human Factors -- 83 -- Herbicide-Resistant Crops -- 83 -- Infiltrability -- 89 -- Infiltration -- 89 -- Infrastructure -- 91 -- Irrigation -- 92 -- Land -- 99 -- Latitude -- 109 -- Management -- 110 -- Mass Movement -- 120 -- Mining -- 122 -- Mulch/Mulching -- 123 -- Natural Disaster -- 128 -- Natural Vegetation/Native Condition -- 128 -- Percolation -- 130 -- Perennial Grasses and Other Vegetation -- 130 -- Pests -- 131 -- Phreatophyte -- 135 -- Plant -- 135 -- Planter/Seeder Type -- 137 -- Planting/Seeding -- 137 -- Production Level -- 144 -- Rangelands/Grasslands/Pastures -- 145 -- Residues -- 149 -- Runoff -- 153 -- Season -- 154 -- Sedimentation -- 154 -- Sediment-Retention Basin -- 154 -- Soil -- 155 -- Soils -- 173 -- Straw Spreader -- 176 -- Stream Erosion Control -- 176 -- Stripper Header -- 181 -- Sustainable Agriculture/Sustainability -- 182 -- Threshold Value -- 183 -- Tillage -- 183 -- Traffic Ruts -- 200 -- Transpiration -- 201 -- Underflow -- 202 -- Water Control Practices -- 203 -- Watershed -- 227 -- Water Shortage -- 228 -- Water Table Fluctuation -- 228 -- Woodland -- 229 -- Appendix Common and Scientific Names of Plants, Animals, and Other Organisms -- 231.