Analyses showed that the coefficient of variation and the spatial correlation length of soil cohesion can have a large influence on footing bearing capacity, particularly for slopes with large height to footing width ratios.
Tests in field indicate that for soil-rototilling operation, the tillage depth is deeper than 80 mm, the soil-crushing rate (length of soil block less than 40 mm) is over 50%%, and the vegetation coverage rate is over 55%%.
In the batch diffusion studies with soil aggregates, the estimated diffusion radius (length) of the soil aggregates corresponded to the half-spacing of the aggregate fissures, suggesting that the intra-ped fissures reduced the diffusion impedance and preferentially allowed solutes to diffuse into the soil matrix.
Results implied that the improvement in land cover in the Beiluo River basin from 1987 to 2007 led to sediment entrapment in the sink area and changed the soil erosion processes, especially the slope gradient and flow length of the soil erosion source area.
For instance, this weevil lives underground during its diapause stage, and the length of the soil frost period is likely to be a selective factor [ 14].
The suggestion is made that the experimental manipulation should match the rate, length, and severity of soil water deficit (SWD) necessary to test the hypothesized type of drought adaptation mechanism.
The differentiation between horizons is clearer in the north than in the south in line with decreasing length and intensity of soil formation as conditions become more arid.
Decomposition and N release from crop residues depend on autochthonous soil microbes, length of decomposition period, and soil and environmental conditions.
Application of the Arya and Paris (AP) model to estimate the soil water retention curve requires a detailed description of the particle-size distribution (PSD) because the scale factor α, relating the pore length of an ideal soil to that of the natural one, depends on the particle-size distribution parameters.
This is in good agreement with the results obtained in the here presented standard tests (lowest EC50 for shoot length of 49.8 mg/kg soil dry mass).
Further features that should be taken into consideration include climate (frosts, temperature, photoperiod, and length of growing season), soil properties (pH, salt, and nutrient concentration), plant availability, length of vegetation cycle, and production direction (e.g., pulp, wood, biofuels, and other products).
