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~~ <br />( k <br />~.~ . <br />III IIIIIIIIIIIIIIII ~ <br />999 <br />UNITED STATES DEPARTM$N'f OF AGRICULTURE <br />Soil Conservation Service <br />Colorado <br />STAN DARUS AND SPECIFICA'rLON <br />t1ULCHiNG - 484 <br />(Acre) <br />Standard <br />Definition <br />Applying plant residues or other <br />materials not produced on the site to <br />the soil surface. <br />Purpose <br />To conserve moisture; prevent surface <br />,` compaction or crusting; reduce runoff <br />~ and erosion; control insects; and help <br />establish plant cover. <br />Conditions where practice aaalies <br />On soils sub,)ect to erosion on which <br />low-residue-producing crops, such as <br />grapes and small fruits are grown; on <br />crltical areas; and on soils that have <br />a low infiltration rate. <br />Specifications <br />A. General <br />1. The area shall be relatively <br />smooth and free of gullies or drifts. <br />2. Mulching material shall be <br />applied immediately before or after <br />seeding unless seed is applied with <br />the mulch. When stabilizing sandy <br />soils it is recommended that seeding <br />will be done after mulch application <br />to prevent seeding too deep. For <br />additional information refer to <br />Agronomy Technical Note 1147 (Rev. I) <br />Technical Guide <br />Section IV <br />All Field Offices <br />February 1982 <br />B. Straw or Nav Mulch <br />1. The material will be grass <br />hay or cereal grain straw (both <br />referred to as straw in these <br />specifications). <br />2. The normal rate of appli- <br />cation shall be 4,000 lbs/ac. of <br />air-dry material spread uniformly <br />over the area. <br />3. AC least SU% of the mulch <br />by weight shall be IO inches or <br />more !n length. <br />4. The straw wiil be free of <br />noxious weeds. <br />5. One of the following <br />methods of anchoring tl~e straw <br />mulch will he used: <br />a. Manufactured mulch <br />netting: rtulcti netting will be <br />pulled hand tight over straw. <br />Mulch netting will be held firmly <br />in place by metal pins commer- <br />cially available from mulch nec <br />manufacturers Eor this purpose. <br />They are usually made of 8 guage <br />wire and are 6-8 inches long. Pin <br />spacing will be in accordance with <br />the manufar_turer's instructions. <br />If the soil is sandy or otherwise <br />loose, use longer pins and wooden <br />stakes to firmly secure [he <br />netting. <br />TGN 11182 2/82 <br />