Soil Management |
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acid soils agricultural alkaline ammonium sulfate amount animal manure azolla bacteria band calcium clay loam compost compost application contour farming corn crop production crop residues crop rotation crop yields cultivation deficiency effective elements farmers field green manure green manure crop growing grown hectare High yield potential humus Iloilo City improve increase inoculant irrigation kilograms land leaching leaf leaves legume legume crops less lime limestone loam loam sandy loam loam to clay logbook loss Low yield potential magnesium materials mineral minimum-tillage moisture needed nutrient present organic fertilizer P.D. Sangatanan paddy percent Philippines phosphate phosphorus Photo by P.D. placement plant growth plowed potassium practice rainfall rhizobia rice straw root nodules root system sample season seed silt slope soil erosion soil fertility soil inoculants soil management soil organic matter soil pH soybeans strips subsoil sulfur superphosphate supply surface t/ha terrace textured soils tillage tillers vegetation VOCABULARY Know weeds