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composition. Several rock ridges with shallow soils also occur in these fields, further reducing <br />potential production. Burbridge, who does not fertilize his hay fields, has little alfalfa in the stand, <br />and significant areas of shallow soils with rock ridges. Combined, these result in a potentially <br />low level of productivity in his hay fields. However the hay production from this field is adequate <br />to meet Burbridge's needs and thus the incentive for more intensified management is not there. <br />It should be pointed out that Burbridge's cut hay was rained on twice and turned twice before <br />baling which will reduce both the yield and quality of hay. Staats' hay production values, though <br />higher than most first cuttings, still does not reflect the potential production. Because of land <br />leveling on Staats' fields, cut areas (exposing subsoil materials with lower production potential) <br />have lower overall yields, though irrigation water management is benefited. Staats' fields (in the <br />proposed permit area) north of Galamity Draw are not intensively managed because of more <br />productive and easier managed fields south of Calamity Draw, and an already adequate hay <br />base provided from these latter fields. Staats' fields which were included in this study are not <br />fertilized on a regular basis, irrigation water application is not consistent during the growing <br />season, and the fields are grazed during the non-growing season. This reflects management <br />during the last several years. A portion of Garvey's hay fields were renovated in 1986 and <br />• herbicides were applied to control persistent perennial weeds such as Canada thistle and <br />quackgrass. The fields have not been fertilized for several years, some areas of shallow or <br />boggy soils occur in part of the fields, alfalfa composition in some of the older fields is low, and <br />the hay fields were grazed during the winter and into the early growing season. These factors all <br />combined to reduce production below the potential in Garvey's fields. <br />In summarizing the type, varying site characteristics, individual management objectives, II <br />applied management, and number of cuttings, result in wide ranges in production for the type. <br />Based on the 1987 field data collection, only one operator at this time manages for sustained <br />production during the growing season that approaches the potential of the site. <br />SwalelDrainge Tvae. Flood irrigation of lands on and adjacent to the study area has created <br />water regimes in certain locations that favor the establishment of hydrophytic and phreatophytic <br />vegetation (see Figure 4-5, Peabody Appendix 10-4). These situations occur where: 1) small <br />natural drainages or swales (with gentle slopes) collect tailwater drainage from the surrounding <br />irrigated fields; 2) shallow ground water, augmented by irrigation, daylights along exposed <br />• (REVISED 8115100) 2.04.10 - 34 <br />