Strip cropping for soil conservationU.S. Government Printing Office, 1938 - 39 pagina's |
Veelvoorkomende woorden en zinsdelen
acre alfalfa alsike base line buffer strip Bulletin Bureau Chief close-growing crops conserve soil contour interval contour line contour strip cropping control strips controlling erosion correction strip cover crops crop production Crop Rotation crop strips cultivated crops cultivated fields cultivated row crops cultivated strip deviation effective erosion control erosion-resisting crops farmer feet fence fertility Field strip cropping FIGURE grassed waterways gullies harvested increase kudzu laid LAYING OUT STRIPS legumes length of slope Lespedeza methods moisture orchards parallel strips pasture perennial strip planted plowing point rows protection rain rainfall regular farm crops resistant to erosion run-off water seeded small grains soil and water Soil Conservation Service soil losses soil-building crops sorghum Sown straddle the terrace strip boundaries strip cropping fig strip-cropping system terrace interval terrace ridges terraced land tillage tivated true contour turn strip type of vegetation wheat width of strips wind erosion Wind strip cropping winter barley