Sandy loam coefficient

Many studies indicated that in the presence of DOM, the metal sorption capacity decreased markedly for most soils, and the effect on the calcareous soil was greater than on the acidic sandy loam. Figure 10.4 shows the metal sorption equilibrium isotherms onto soils with or without the addition of 400 mg C/l of DOM. The equilibrium isotherms could be better depicted according to the linear Freundlich equation with the high value for the correlation coefficient of determination (r2) ... 

During the daytime, the surface of the soil can be considerably warmer than the underlying layers (Fig. 7-13), which leads to heat conduction into the soil. Because the soil exposed to the turbulent air tends to be drier than the underlying layers, the thermal conductivity coefficient can be lower near the soil surface. For the upper part of a fairly moist sandy loam, Z 50 1 may be 0.6 W m-1 °C-1 and dT/dz maybe —100°C m-1 (at least for the upper 0.05 m or so). Using Equation 7.27, the heat flux density by conduction into the soil then is... 

The erosion resistance of soil can be classified not only on the basis of the protection coefficient (see p. 421), but also on the basis of other indices. For example, another index that can be used to characterize the erosion resistance of soils containing sand particles is the ratio of the total quantity of sand to the total quantity of silt and dust fractions. This ratio, in uneroded sandy-loam chernozem soils and dark-chestnut sandy-loam soils, is 3.6 and 2.9, respectively in the corresponding eroded soils, the values are 6.6 and 5.2 i.e., twice as high. 

---