COVER CROPS  Provide food for beneficial soil microbes and earthworms  Increase soil organic matter, which helps improve soil quality and fertility Blanco-Canqui.

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Presentation transcript:

COVER CROPS  Provide food for beneficial soil microbes and earthworms  Increase soil organic matter, which helps improve soil quality and fertility Blanco-Canqui et al., 2011

Soil Moisture Retention By Cover Crops In Corn  a cover crop mulch preserved moisture in a drought DAR= days after rain (irrigation) NCC=no cover crop NT= no till with a rolled cover crop mulch TCC= cover crop mowed and tilled in  Cover crops prevent runoff and can help retain soil moisture

 Cover crops help reduce soil compaction and soil erosion Blanco-Canqui et al., 2011 Williams and Weil, 2004

 Weed Control  Cover crops produce a lot of biomass, which helps to prevent weed germination and growth  Fallow fields grow weeds, plant a cover crop in the off season Cowpea Weedy plot with no cover crop

 Nutrient advantages  Winter cover crops capture and hold nitrogen so that it is not lost to the atmosphere  Increased organic matter is a nutrient reservoir  Legume cover crops produce nitrogen that can then be used by the following crop, reducing fertilizer costs McVay et al., 1989

Manure and Compost Add nutrients Improve water infiltration and retention Improve structure Celik et al., 2004Zebarth et al., 1999 Water content after 3 years of compost addition Porosity after 4 years of fertilizer, compost or manure addition