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• <br />MICRONUTRIENTS AND TRACE ELEMENTS <br />A summary of the analytical results of micronutrients and trace <br />elements as they occurred on the soil samples collected on the Dow <br />west property, the terminal facilities, and water intake facility <br />sites may be found in Appendix B of this exhibit. <br />Micronutrients are essential for plant growth but small additional <br />amounts of micronutrients over the essential level can be toxic <br />to plants (generally by limiting the uptake of other nutrients) <br />or to animals that consume plants high in certain micronutrients. <br />In all cases, the concentration of available copper, boron, zinc <br />and molybdenum are ample for plant needs and within the range <br />of normal soils (Bowen 1966, Buckman and Brady 1969). <br />The trace element analytical results presented in Table I-4 are <br />all within normal ranges for soils with the exception of Arvada <br />• #1 and #2 (Anon. 1972, Bowen 1966, Buckman and Brady 1969). The <br />content of chloride in Arvada #1 is higher than usually encountered <br />in surface soils while in the Arvada #2 soil boron content exceeds <br />6.0 ppm below 20 inches. <br />SUMMARY <br />Of the soil mapping units that occur on the Dow West, the water <br />intake facility and the terminal facilities permit areas, most <br />have qualitites desirable for topsoil stripping. These soils <br />can be stripped to an average 17 inch depth, while one, the Silas <br />loam has qualities that would allow it to be stripped to depths <br />greater than 60". <br />Only the Arvada soil has significant limitations for use as seed- <br />bed material. in cases where the Arvada soil must be stripped <br />• and stockpiled, an appropriate seed mix and suitable management <br />I-27 <br />