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(Schriefer, 1984; Vogtmann et al., 1986a; Little, 1987)
System |
Some Common Practices |
Minimum tillage |
Chisel plowing Disc harrowing Overseeding Two-layer plowinga |
No-till without chemicals |
Aerial seeding Drilling into previous crop Overseeding |
Ridge tillage |
Ridging Planting on ridges Chisel plowingb Disc harrowingb |
Ro-till |
Planting with in-row chisel tillage |
Contour tillage |
Variety of tillage practicesc |
a A plow manufactured in Germany that does not bring lower soil layers to the surface or invert the top layer.
b Unnecessary in many ridge tillage systems.
c A variation on contour tillage for dryland areas called the "Keyline Plan" was developed by Yeomans (1978).
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