Related by context. Frequent words. (Click for all words.) 73 conservation tillage 69 tillage 65 rotational grazing 61 crop residue 58 corn silage 56 crop residues 55 silage 54 manures 53 irrigated 52 corn stover 52 ryegrass 52 oilseed crops 52 soil fertility 52 dryland 51 tilling 51 synthetic fertilizers 51 tall fescue 51 Miscanthus 51 herbicides 51 soil compaction 51 crops 50 oilseed rape 50 drip irrigation 50 cereal crops 50 evapotranspiration 50 resistant varieties 50 grain sorghum 49 nitrous oxide emissions 49 cotton acreage 49 pigweed 49 perennial grasses 49 switchgrass 49 forage 48 mulches 48 forages 48 woody plants 48 Bt cotton 48 unplanted 48 cropland 48 fertilizing 48 croplands 48 soils 47 broadleaf weeds 47 sweet sorghum 47 lucerne 47 agronomic 47 corn acreage 47 digestibility 47 biochar 47 nitrogen fertilizer 47 horticultural crops 47 harvestable 47 alfalfa 47 soil pH 46 liquid manure 46 overseeding 46 cultivator 46 pasture 46 arable 46 manure 46 mulching 46 fungicides 46 nematodes 46 tilled 46 chemical fertilizers 45 windbreaks 45 pest resistant 45 transgenic plants 45 fungicide 45 organic fertilizers 45 sandy soils 45 agroforestry 45 monocultures 45 carbon sequestration 45 organic farming 45 Bt corn 45 paddy cultivation 45 irrigation 45 paddy crop 45 crop 45 bolls 45 germination 44 Herbicides 44 farming 44 soybean planting 44 nematode 44 EQIP 44 nitrogen fertilizers 44 fumigants 44 grazing 44 soil moisture 44 prairie grasses 44 Bt 44 Environmental Quality Incentives 44 soil erosion 44 linseed 44 corn 44 herbicide 44 crop yields 44 soybean acreage 44 aeration