Soil Organic Matter Unit: Soil Science Lesson 3. Objectives Define: soil organic matter Explain the role of inherent factors affecting soil organic matter.

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Soil Organic Matter Unit: Soil Science Lesson 3ObjectivesDefine: soil organic matterExplain the role of inherent factors affecting soil organic matterExplain the five soil organic matter management practicesExplain how soil organic matter relates to soil functionEstimate organic material needed to increase soil organic matterMeasure soil organic matter

Soil Organic Matter Is the organic component of soil, consisting of three parts:Plant residues and small living soil organismsActively decomposing matterHumus: Stable organic matterRole of Inherent Factors Affecting Soil Organic MatterClimateOrganic matter decomposes more quickly in warm and humid climates that cool dry climatesSoil TextureSoil aeration: more oxygen in the soil speeds up the decomposition process VegetationPrairie soils have more organic material added to the soil than forest soils because of vegetation. Soil Organic Matter ManagementUse of cropping systemsReducing or eliminating tillageReduce erosion Soil-test and fertilize properlyUse of perennial foragesBenefits of Soil Organic MatterNutrient SupplyWater-Holding CapacitySoil AggregationErosion Prevention

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