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TABLE 2.04,10-6 <br />MEAN HERBACEOUS PRODUCTION (g/0.25mz) FOR THE IRRIGATED <br />PASTURE VEGETATION TYPE, NEW HORIZON 2 STUDY AREA, 1987 <br />Mean Herbaceous Production g/0.25m2 9/mz Ibs/ac ka/ha <br />79.2 316.8 2822.6 3168.0 <br />Note: s = 54.2 (g/0.25m2) <br />N=51 <br />Minimum sample size required (nm;~) = 127 <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 <br />in the irrigated pasture type. Some operators periodically grub out the woody plants, while <br />others allow their continued existence. The actual densities observed in the field were low, a <br />fact borne out by the lack of woody plants present in the cover samples (Peabody Appendix <br />10-2, Table 2-1). Therefore, an estimate of woody plant density was made by directly counting <br />individuals from stereo color aerial photographs (1" = 500' scale) flown in June 1987. Field <br />checks for verification were made in mid-September 1987. As shown in Table 2.04.10-7, the <br />stem density averaged a low six per acre, comprised of the five species listed. The total <br />estimate for the type was 947 trees. <br />• (REVISED 9/99) 2.04.10 - 31 <br />