ridge, soil, deep, no contour, zero, shallow, under, different reduced, without minimum, primary, different intensive secondary conventional, mechanical conservation

plots, res, corn, tools, land, may treatments, farming, systems, methods, system, effects, research, practice, method, treatment techniques, effects, research implements, practices, management erosion, equipment agriculture operations, operation

contour plots, farming, planting, strip, cultivationsoil erosion, conservation, mulch, surface, depth, conditions, cultivation, res, treatments, managementcropping intensity, systems, practices, system, techniques, area, methodsstrip cropping, farming, methodagricultural implements, machinery, production, crops, land, soils, practices, research, plots, fields, crop, operations, technology, implement, techniques, cropping, equipment, tools, systems, cultivation, methods, areafarming implements, practices, systems, operations, methods, techniques, operation, tools, plots, equipment, machinery, system, land, area, technology, practice, conditionsintensive cropping, cultivation, farming, agriculture, agricultural, crops, crop, treatment, production, methods, techniques, technology, research, operations, treatments, erosion, management, operation, systems, manualcrop cultivation, production, farming, planting, agriculture, fields, farmers, management, area, landmachine tools, operation, operationstraditional agroecosystems, methods, farming, practices, cropping, agriculture, agricultural, method, crops, techniques, treatments, practice, implements, toolscorn crop, planting, crops, fields, cultivation, farmers, production, farming, plots, rowshallow soils, depth, soil, cultivation, planting, surface, minimumplanting crops, corn, depth, techniques, fields, methods, soil, practices, operations, areaspring planting, crop, crops, termplow agriculture, fields, depth, under, landalternative treatments, minimum, methods, method, cropping, crops, techniques, agriculture, treatment, farmingrow crops, cropping, crop, planting, cultivation, plots, operationssurface area, mulch, treatments, contour, erosion, soils, soil, treatment, normal, plotsmanagement practices, techniques, systems, tools, systemcultivation practices, techniques, plots, methods, systems, systemannual cropping, crops, crop, production, increases, springconventional treatments, methods, rotary, techniques, farming, treatment, method, mechanical, agriculture, plots, practices, machine, crops, systemsdepth contour, increasesimproved implements, farming, cropping, methods, machinery, agricultural, technology, crop, techniques, mechanical, cultivation, method, management, conditions, treatments, planting, agriculture, tools, soil, practicesconservation practices, area, farming, treatments, techniques, agriculture, management, methodsunder cultivation, conditions, normalmechanical equipment, systems, rotary, treatments, cultivation, implements, erosion, methods, effects, operation, operations, system, treatment, toolscrops res, crop, researchcompulsory primary, cultivation, treatment, secondary, minimum, mechanicaloperations manual, research, managementcareful cultivation, management, planting, researchthorough treatment, cultivation, treatments, researcherosion plots, surface, intensity, depth, increasesrotary machine, mechanical, toolsnormal operation, conditions, contour, operations, practiceresearch methods, tools, techniquesterm effects, treatmentexcessive erosion, production, cultivation, mechanical, soilintensity increases, contour, plotsreduce erosion, excessive, crop, soilmanual operation, methods, operations, techniques, method, systemssubsequent erosion, treatments, operations, research, treatment, cropsvarious methods, fields, treatments, techniques, crops, implements, toolshand toolsappropriate technology, treatment, tools, treatments, method, methods, conditionsproper operation, treatment, equipment, cultivation, tools, management, method, depth, contour, plantingconditions under, improvedminimal compared, effects, equipment, conditions, manual, surfaceprimary production, secondary, treatmentreducing erosion, conditions, excessive, crop, soilzero contour, intensityreduces erosion, soilproduction techniques, systems, methods, technology, equipment, machinery, increases, operationsfall under, plantingminimum depth, annual, intensityagriculture implements, agricultural, farmingrepeated treatmentsdifferent treatments, methods, fields, techniques, crops, cropping, soilsland management, conservation, area, plots, surface, cultivation, farmingincreased production, erosion, cropping, intensity, agricultural, croptechnology intensive, management, toolsfarmers plantingclean cultivation, surface, technologysecondary effects, treatment, cropsthree different, primary, treatments, methodsfour different, treatmentswithout reducing, excessive, properdeep soils, plantingarea underimplement appropriate, conservationpreparatory operations, practices, conditions, techniquesmethod reducesgood practice, mulch, cropno alternative, bettermay reducereduced comparedtreatment methods, effects, reduces, manual, techniquesmachinery equipmentsoils under, soilpractice manualcomplete withoutbetter alternativefrequent cultivation, practicesystems managementtreatments comparedoperation manual