Laserfiche WebLink
<br />002369 <br /> <br />periods. This can be done by such <br />means as maintaining a maximum <br />grass roseI've, developing a reserve of <br />stored forage crops, and maintaining- <br />the most flexible herd management pos- <br />sible. A flexible herd may be main- <br />tained by such practices as grazing <br />yearlings on a temporary basis so that <br />they can be sold without reduction of <br />the brceding herd. Range-manage- <br />ment practices and ilnprovcments will <br />be much the same on all land-capability <br />classes. The physicartreatments to be <br />applied, however, will be materially <br />afl'ected by the same factors that enter <br />into the land-capability classification. <br />The most generally applicable me- <br />chanical treatment for range conserva- <br />tion is use of contour structures (fig. 8). <br />'rhcse vary greatly in size, effectiveness, <br />and applicability; recommendations, <br />therefore, can be only general. These <br />structures are most successful on mod- <br />erately heavy soils with moderately low <br />infiltration rates (groups 4 and 6), on <br />moderate slopes, and where thcre is <br />suflieicnt soil dcpth to warrant the <br /> <br />treatment (minimum of about 10 <br />inches). This limits the application <br />largely to classcs III and IV. Struc- <br />tures arc not generally to be recom- <br />mended on rough broken lands, on <br />sandy lands, on very shallow soils, on <br />land which is subject to drifting soil <br />from adjacent areas, or where grazing <br />hus not been properly restricted. There <br />arc numerous' opinions as to the bcs;t <br />type, but good results have been se- <br />cured from moderately small structures <br />made with the common farm lister. <br />Water-spreading structures may be <br />used to advantage where water can be <br />taken from gullies or water courses and <br />spread on produetive land of moderate <br />slope. Water spreading on range land <br />may ordinarily be effeeted as a eom- <br />bination of water-spreading and gully <br />treatment. <br />Many small, severely eroded areas in <br />the range land ean be stabilized if they <br />are protected from gTazing and if run- <br />off is eon trolled by eon tour furrowing or <br />construction of diversions. Sometimes, <br />however, trees, shrubs, or grasses may <br /> <br /> <br /> <br />Col-297 <br /> <br />Figure B.-Contour structures have proved effective in aiding recovery of ,the range. <br /> <br />Western and Southeastel'n Baca County Soil Conservation Districts, Colorado <br /> <br />HI <br />