Fields must be worked perpendicular to the prevailing wind direction to obtain maximum wind erosion protection. Till deep enough to penetrate the firmer subsoil so that clods are brought to the surface. The ridge width should be about four times the ridge height. The soil should be formed into well rounded ridges. At higher speeds, the tillage implement tends to pulverize soil clods, while at lower speeds, the implement does not turn up enough clods.
Sandy soils are the most difficult to hold with emergency tillage.
Sandy soils are the most difficult to hold with emergency tillage as few clods are turned up and ridges that are formed breakdown rapidly. If tillage is needed on these types of soils, the entire field should be ridged. Later ridging, if necessary, should be progressively deeper and can be in or between the old furrow. Medium to fine textured soils Medium to fine textured soils respond more readily to emergency tillage than coarse textured soils. On these soil chisels can be used to produce a rough, cloddy surface.