discing, mulching, tilling, tillage, hoeing, shelterbelts, manuring, haying, spading, disked, topdress, hilling, weeds, fertilizing, windrow, sprigging, replanting, harrow, rototill, planting, husking, nutgrass, grazing, mowing, retting, silage, aerification, baling, ryegrass, frost heaving, pruning, swather, coppicing, nutsedge, flea beetle, harvesting, ensiling, preemergence, bromegrass, threshing, aerating, johnsongrass, intercrop, compaction, soil erosion, buffel grass, tillering, crimson clover, seeder, sorghums, vegetation, vetch, bermuda grass, sericea lespedeza, foxtail barley, hulling, cutworms, quackgrass, forbs, chinch bug, moldboard plow, grass, sudan grass, downy brome, bahia grass, reed canary grass, posthole digger, alfalfa, hairy vetch, irrigating, clubroot, foxtails, bitterbrush, brome grass, weeder, sphagnum, herbage, lygus, henbit, soilless, sward, tansy ragwort, webworms, foliar, pasture, smartweed, haylage, awns, flouring, wireworm, revegetate, timbering, rye grass, phalaris, abscission, burs, rototiller, shortleaf pine, spatterdock, sunscald, lucerne, frogeye, ploughing, plowing, watering, harrowing, irrigations, waterings, spraying, brushing, burning, cleaning, defoliation, dredging, dusting, freezing, immersion, inundation, liming, oiling