Because soil properties that are relevant for soil functioning but do not show much variation in a given study will not be included in the minimum dataset, validation of the minimum dataset is important, for example by testing its relation to predefined and independently measured management goals ...
Soil erosionby water is considered one of the major causes ofland degradationand a large number of investigations have been carried out aiming at developing and testing methods for the evaluation ofsoil erosionprocesses using GIS.Gulliesare among the main soil–water erosion features in various p...
第三段第一句Urban Sprouts’ classes, at two middle schools and two high schools, include hands-on experiments such as soil testing, flower-and-seed dissection, tastings of fresh or dried produce, and work in the garden. 这些长难句对学生的理解造成了一定干扰。 3. 培养细节理解的关键词定位...
The exchangeable fraction of soil potassium (K) has been viewed as the most important source of plant-available K, with other sources playing smaller roles that do not influence the predictive value of a soil test. Thus, as K mass balance changes, the so
MarsOne has announced that they have addressed the all-important issue of what their settlers will eat. In an experiment that feels like it was ripped from theThe Martian, MarsOne has completed testing different types of crops in simulated Martian soil, to see which ones could grow on Mars....
Other problems associated with compacted soil liners include but are not limited to: difficulty in withstanding differential settlement, difficulty in repairing, less airspace resulting from greater layer thickness, field hydraulic conductivity testing is sometimes required, high cost if on-site soils are...
A further step would be to shift emphasis from parameter estimation toward a framework of formal testing of competing hypotheses of the mechanisms governing soil structure and its development. This can be addressed by model selection techniques that use geophysical data to discriminate among multiple ...
Mechanisms controlling lateral and vertical pore-water migration of depleated uranium (DU) at two UK weapons testing sites. Science of the Total Environment. 2011;409:1854-1866 10. Hamby DM, Tynybekov AK. Uranium, thorium, and potassium in soils alon...
(32). Fig. 9 shows the step-by-step procedure of the MEBM for predicting the vertical movements of unsaturated, expansive soils with respect to time. Table 1 summarizes four case studies from different regions in Canada and China that were used for testing the validity of the MEBM for ...
and model testing (the remaining 25% data; R2 = 0.52–0.77) of the eight first-order model parameters except M2-k1ref, where a low R2was found in model testing (see Supplementary Table1). This indicates that RF could be used to reliably predict the decomposition kinetics parameters. ...