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Root-restricting subsurface hard layers amended with organic matter and polyacrylamide (PAM) increase aggregation and water holding capacities in a coastal soil. The amendment (PAM or a mixture of PAM and organic matter) can save labor, equipment, and energy by reducing the need for deep tillage. More work needs to be done to determine the best mixture and the longevity of its effect on the soil. More Information: Amendments to increase aggregation... Technical Abstract Full PDF 
Soil Amendments to decrease high strength...Technical Abstract Full PDF
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Increased organic carbon with reduced tillage and time: Non-disked conservation treatments built up soil organic carbon on the soil surface; and, as a result, they retained the loosening effects of deep tillage longer than conventional disked treatments.
More Information: Effect of strength and organic matter buildup...Technical Abstract Full PDF
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Long-term conservation tillage can rebuild soil organic matter levels in sandy soils: Conservation tillage management resulted in an additional 7600 pounds of organic matter per acre in the top 5 cm (2 in) of soil compared to conventional tillage management. Increased soil organic matter not only sequesters carbon but it can also reduce runoff and improve soil, water, and nutrient retention for plant growth.
More Information: Carbon Dynamics under long-term conservation...
Interpretive Summary Full PDF
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Rebuilding soil organic carbon levels increases crop yields: Our research shows that increasing organic matter through conservation tillage improved yields, especially in dry years.
More Information: Crop yield and Nitrogen accumulation...Interpretive Summary Full PDF
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Deep tillage between buried trickle tubes loosens soils and improves crop yields: Though buried trickle tubes can irrigate crops in the sandy coastal soils, in time, soils form hard layers, reducing yields. When trickle tubes are buried in alternate mid rows, deep tillage under the row loosened the hard layer and improved crop growth.
More Information: Alleviation of compaction in a microirrigated coastal soil Technical Abstract Full PDF
Timing Effects of Deep Tillage on Penetration Resistance...Full PDF
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Last Modified: 11/14/2007
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