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Table 6-1-3 (Cont.) <br /> Footnotes: <br /> 25 <br /> This value proposed by Barth et al. (1981 ). <br /> 26 <br /> This value is supported by WDEQ (1985), Smith (1974). and Sutton et al . (1981 ). Units <br /> are tons of CaCO3 required per acre furrow slice. <br /> 27 <br /> These values supported by Sutton et al . (1981) and Lindsay and Norvell (1978). <br /> Schafer (1980) proposes 60. <br /> 28 <br /> These values supported by Barth (1986) and Lindsay and Norvell (1978). The high iron <br /> level (300 ppm) may not be toxic but may cause significant nutrient imbalances. <br /> 29 <br /> These values are recommended by Barth et al . (1981), Sutton et al . (1981), and Lindsay <br /> and Norvell (1978). <br /> 30 <br /> This value recommended by MDSL (1983), WDEQ (1985), and Barth et al . (1981). <br /> 31 <br /> This value supported by USDI-OSMRE (1985a); Schafer (1979, 1980), Barth et al. (1981), <br /> and Sutton et al . (1981) propose 2.0. <br /> 32 <br /> This value recommended by WDEQ (1985) and USDA (1957). <br /> 33 <br /> This value proposed by Sutton et al . (1981). <br /> 34 This value proposed by Schafer (1980); Barth et al . (1981) recommends 0.8. <br /> 35 <br /> This value supported by Schafer (1980). <br /> 6-1-30 Revised 04/11/88 <br />