Sandy clay loam

Btl 35-55 cm yellowish red (5YR 4/6) sandy clay loam, weak medium subangular blocky structure... 

Btknzl 12.5-20 cm light yellowish brown (10YR 6/4) sandy clay loam, moderate medium prismatic structure... 

Under laboratory conditions, endrin degraded to other compounds in a variety of soils maintained at 45 °C. Except for Rutledge sand, endrin disappeared or was transformed in the following soils after 24 h Lynchburg loamy sand. Magnolia sandy loam. Magnolia sandy clay loam, Greenville sandy clay, and Susquehanna sandy clay. No products were identified (Bowman et al., 1965). 

Soil. Methylene chloride undergoes biodegradation in soil under aerobic and anaerobic conditions. Under aerobic conditions, the following half-lives were reported 54.8 d in sand (500 ppb) 1.3, 9.4, and 191.4 d at concentrations of 160, 500, and 5,000 ppb, respectively, in sandy loam soil 12.7 d (500 ppb) in sandy clay loam soil 7.2 d (500 ppb) following a 50-d lag time. Under anaerobic conditions, the half-life of methylene chloride in clay following a 70-d lag time is 21.5 d (Davis and Madsen, 1991). The estimated volatilization half-life of methylene chloride in soil is 100 d (Jury et al., 1990). 

Flugo gravelly sand loam), 4.33 (Elkorn sandy loam), 3.53 (Sweeney sandy clay loam), 4.09 (Tierra heavy clay loam) (Wahid and Sethunathan, 1978)... 

Biological. Strychnine degraded in sandy loam and sandy clay loam soils. The disappearance half-life ranged from 24 to 27 d (Starr et al., 1996). Initial degradation products (i.e., strychnine... 

Cecil sandy loam), 1.64 (Eustis fine sand), 2.25 (Glendale sandy clay loam), 1.88 (Webster silty clay loam, Davidson et al, 1980)... 

Culley, J. L. B. and Phillips, P. A. (1982). Bacteriological quality of surface and subsurface runoff from manured sandy clay loam soil. J. Environ. Qual. 11,155-158. 

Bayer, C., Martin-Neto, L., Mielniczuk, J., and Ceretta, C. A. (2000). Effect of no-till cropping systems on soil organic matter in a sandy clay loam Acrisol from Southern Brazil monitored by electron spin resonance and nuclear magnetic resonance. Soil Til. Res. 53, 95-104. 

Nearly all thin film photolysis studies involving triazine herbicides have utilized model surfaces such as filter paper (Jordan et al., 1964 Morita et al., 1988), aluminum (Jordan et al., 1965), glass (Pape and Zabik, 1972 Chen et al., 1984 Hubbs and Lavy, 1990), and silica gel (Lotz et al., 1983). A shortcoming of the use of model surfaces is that herbicide dissipation due to volatility losses is often not accounted for (Hubbs and Lavy, 1990). Konstantinou et al. (2001) studied the sunlight photolysis of atrazine, propazine, and prometryn on soil (sandy clay loam, clay loam, and... 

Lopez-Avila et al. [8] published a study in 1993 that evaluated the Soxtec extraction of 29 target compounds (seven nitroaromatic compounds, three haloethers, seven chlorinated hydrocarbons, and 12 organochlorine pesticides) from spiked sandy clay loam and clay loam. Among the five factors investigated (matrix type, spike level, anhydrous sodium sulfate addition, total extraction time, and immersion/extraction time ratio), matrix type, spike level, and total extraction time had the most pronounced effects on method performance at the 5% significance level for 16 of the 29 target compounds. The two solvent mixtures, hexane-acetone (1 1) and methylene chloride-acetone (1 1), performed equally well. Four compounds were not recovered at all, and apparently were lost from the spike matrix. Limited experimental work was performed with 64 base-neutral-acidic compounds spiked onto clay loam, and with three standard reference materials certified... 

Gritty More than 35% very coarse sand and very fine (l-3mm) gravel 3. The Loams loam (L), sandy clay loam (SCL), siltyloam (ZL)... 

Elkhorn sandy loam at pH 6.0, Hugo gravelly sandy loam at pH 5.5, Sweeney sandy clay loam at pH 6.3 and Tierra clay loam at pH 6.2, Rao Davidson 1982)... 

Soil t,/2 = 9.5 d under aerobic, t,/2 = 3 d under anaerobic conditions, field dissipation t,/2 = 1 wk in sandy clay loam (Tomlin 1994) ... 

The typical Clarendon profile consists of a dark grayish-brown, sandy horizon underlain by a yellowish-brown, sandy clay loam horizon, which is underlain by a mottled yellowish-brown, red, and gray, sandy clay loam horizon that contains 5 to 30 percent plinthite. Clarendon soils originate from unconsolidated sediments of medium texture. They are typically found on uplands and have a slope gradient of less than 2 percent. The soils are moderately well drained and have slow runoff. The upper part of the soil profile is more permeable than the lower part. 

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