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We first divided our 96 sites into 3 tillage categories (zero tillage, reduced tillage and conventional tillage), and then divided each of the 3 tillage categories into irrigated sites or dryland sites. We found that in every case, irrigated sites had higher median soil health scores than dryland sites in their same tillage category.
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Elizabeth Black is the producer of the Citizen Science Soil Health Project
The Citizen Science Soil Health Project
4340 N 13th St.
Boulder, CO 80304