Impact of Production Practices on Soil Moisture and Health

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Presentation transcript:

Impact of Production Practices on Soil Moisture and Health Syam Dodla Red River Research Station Louisiana State University AgCenter

Soil Health: Importance Increasing World Population Food Production Demands Decreasing land for agriculture

Soil Health and Soil Moisture Physical Aggregate stability Porosity Surface sealing Compaction Water infiltration Chemical Soil pH Electric conductivity CEC Available nutrients Biological Organic matter Microorganisms Biological activity

Management Practices Cover crops Tillage No winter cover vs Cover Crop No-till vs Conventional tillage

Tillage and Cover Crop Experiment Hairy Vetch Wheat 3224 lbs/ac Control 4511 lbs/ac 949 lbs/ac

Effect of Winter Cover Crops on Soil Moisture

Effect of Tillage on Soil Moisture

Cover Crop vs Soil Moisture Clover Cereal Rye Radish

Cover Crop vs Soil Moisture

Soil Organic Matter and Soil Moisture 1.18 in/ft Sandy Loam 13.5% 1.04 in/ft 1.47 in/hr 1.99 in/hr 35%

Soil Organic Matter and Soil Moisture 1.66 in/ft Silty Clay 1.73 in/ft 0.06 in/hr 0.15 in/hr 250%

Tillage System vs Infiltration 3 Years old In Top 8” Infiltration: 20 to 30%

Tillage vs Soil Properties CT 17 yr- Soybean monoculture SOM = 1.6 % Forest SOM = 4.3 % Adopted from: Marlon Winger, NRCS, Idaho

Influence of Cover crop and Tillage on Soil Infiltration S. Dakota, NRCS, 2017

Conventional Tillage vs Heavy Rain Adopted from: Marlon Winger, NRCS, Idaho

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