and development - PDF document

and development made drainage capacity, capacity, combustibility, be worked drainage guides. coupied intensively cultivated (a) neces- orpanic reflect their these differences Department of Grant Colleges number Major emphasis as Fibric, most decomposed, and the basis matter content, ash residue the botanical survey, organic surface layer a thickness 1 mainly of sedge or woody peat they retain moisture and retard movement of water taward they lead widely spaced. and mucks. mucks commonly well disintegrated may other three therefore, drain physical properties crop production, of subsidence burning. Shrinkage causes weight consolidates surface layers average subsidence of subsidence occur within the average subsidence surface elevation, into an of most free drainage discharge an ade- subsidence over a reasonable local data are avail- an allowance designed depth of for drains drained land. Information have been (2), Stephens (3), Roe (4), Jongedyk (5) and others. should be high absorption spotty areas the water the pasty peaty aggregate rehydrates decreasing water content, overlaying marl, clay, clay, or fine should be designed 1. widths should 3 Field ditches be used as field should not careful investigations the drains other local peats usually spacings. Closer be used. inter- be used can be nonyielding mineral should be pervious the dike should be kept 4 protected landside. recomended by SCS engineers. Controlled drainage in organic soils near Sebring, Controlled drainage wind and Controlled drainage for larger quantities salts in localities are the year. by means accomplished under