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Minimum sample size required (nm;~) = 8 (based on total vegetation) <br />• <br />TABLE 2.04.10-6 <br />MEAN HERBACEOUS PRODUCTION (g10.25mZ) FOR THE IRRIGATED <br />PASTURE VEGETATION TYPE, NEW HORIZON 2 STUDY AREA, 1987 <br />Mean Herbaceous Production g[0.25m2 a/m' Ibs/ac kg/ha <br />79.2 316.8 2822.6 3168.0 <br />Note: s = 54.2 (g/0.25mz) <br />N=51 <br />Minimum sample size required (n,,,,~) = 127 <br />• <br />the operator during the 1987 growing season resulted in a very low productive state. Likewise, <br />sample 20 occurred in an area that receives some benefit from a ground water seep, as well as <br />the normal application of irrigation water. A summary of the individual production plot data is <br />presented in Peabody Appendix 10-2 (Table 2-2). <br />The irrigated pasture type contains incidental woody species at varying densities based on the <br />level of management or maintenance applied to these pastures. All woody plants are invaders in <br />the irrigated pasture type. Some operators periodically grub out the woody plants, while others <br />allow their continued existence. The actual densities observed in the field were low, a fact borne <br />out by the lack of woody plants present in the cover samples (Peabody Appendix 10-2, Table <br />2-1 ). Therefore, an estimate of woody plant density was made by directly counting individuals <br />from stereo color aerial photographs (1" = 500' scale) flown in June 1987. Field checks for <br />verification were made in mid-September 1987. As shown in Table 2.04.10-7, the stem density <br />averaged a low six per acre, comprised of the five species listed. The total estimate for the type <br />was 947 trees. <br />• (REVISED 8/15/00) 2.04.1 ~ - 27 <br />