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A. B. Conner agencies Agri Agricultural Engineering amount areas Bureau of Chemistry Bureau of Public cent Chairman Chemistry and Soils College Station committee Conference conservation of soil cooperation county agent crop cultivated Department of Agriculture ditches drainage drainage basin effective eroded erosion control erosion stations Eugene Butler Experiment Station Extension Service factors farm farmers Federal Land Bank field flood control Forest Service going grass gullies H. H. Bennett important inches interested irrigation Kansas ladies and gentlemen losses Louisiana McCall methods Mississippi Mississippi River moisture conservation National Forests Oklahoma plant food practice present problem production program of soil Public Roads rain rainfall range lands regions river runoff saving dams sections silt slopes soil and moisture soil and water soil conservation soil erosion soil fertility soil moisture soil types Southwest southwestern streams survey terraces Texas things tion washing water and soil water conservation