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more limited . When these soils are cultivated , more careful <br /> • management is required and conservation practices are more <br /> difficult to apply and maintain . Soils in Class IV may be <br /> used for crops , pasture, woodland, range, or wildlife food <br /> and cover . <br /> Soils in Class IV may be well suited to only two or <br /> three of the common crops or the harvest produced may be low <br /> in relation to inputs over a long period of time . Use for <br /> cultivated crops is limited as a result of the effects of <br /> one or more permanent features such as (1) steep slopes , (2) <br /> severe susceptibility to water or wind erosion, (3) severe <br /> effects of past erosion, (4) shallow soils , (5) low moisture- <br /> holding capacity, (6) frequent overflows accompanied by <br /> • severe crop damage, (7) excessive wetness with continuing <br /> hazard of waterlogging after drainage, (8) severe salinity <br /> or sodium, or (9) moderately adverse climate . <br /> Many sloping soils in Class IV in humid areas are <br /> suited to occasional but not regular cultivation. Some of <br /> the poorly drained , nearly level soils placed in Class IV <br /> are not subject to erosion but are poorly suited to intertilled <br /> crops because of the time required for the soil to dry out <br /> in the spring and because of low productivity for cultivated <br /> crops . Some soils in Class IV are well suited to one or <br /> more of the special crops , such as fruits and ornamental <br /> trees and shrubs , but this suitability itself is not sufficient <br /> to place a soil in Class IV. <br /> • <br /> 40 -5- <br />