Since the value of CEC is a dependent variable property of the soil, its value depends on the content of clay minerals, organic matter, fertilization and pH value. Any change in soil properties leads to changes in CEC values, and therefore to changes in soil ...
As verified using the certified reference material for the chemical composition of first-grade soil, the determined CEC values agreed with the certified values, with rel- ative standard deviations ( n = 6) of all less than 2%. The optimized method is characterized by high efficiency and simple...
Oxide removal increased the cation-exchange capacity (CEC) and virtually eliminated the anion-exchange capacity (AEC) at pH 3 and 5.5 while shifting the positive zeta potential (ZPC) of the B-horizon clay toward negative values. ... N Cavallaro,MB Mcbride - 《Clays & Clay Minerals》 被引量...
The development of a map is shown by the example of cation exchange capacity. Twenty sorption types are formed and derived from the vertical sequence of values for substrate types and are aggregated to six main types. A qualitative assessment of the main CEC sorption types is carried out with...
Calibration of 1 M HCl Extractable Soil Boron In Poland, soil critical values for micronutrients are actually based on 1 M HCl extraction, and were introduced into practice in 1986 ( Gembarzewski and Korzeniowska, 1990 ). But the diagnosis of soil available boron according to this c... Stan...
a这也许是我的性格造成的 Perhaps this is my disposition creates [translate] aFigure 6 shows the plots of plate height against k values for the present monolithic silica column in HPLC and CEC. 图6显示塔板高度剧情反对k价值为当前整体硅土专栏在高性能液体色谱和CEC中。 [translate] ...
Previous experimental investigations showed that a large proportion of total plot soil erosion over a long time period is generally due to relatively few, large storms. Consequently, erosion models able to accurately predict the highest plot soil loss values have practical importance since they could ...
There were so many new immigrants that they might even change the basic values of the nation in undesirable ways. D. Americans tried to meet what they saw as a threat to their values by offering English instruction for the new immigrants and citizenship classes to teach them basic American ...
environmental quality assessment for green-food production area: including utilization of the National Soil Environmental Quality Standard(GB15618-1995) as the soil quality assessment standards for green-food production area, in replace of employment of the background values or checked-spots of soil. ...
The calculated Langmuir parameters b (adsorption maximum) and k (bonding energy coefficient) were closely related to soil characteristics. The presence of 0.01 n CaCl2 reduced Cu adsorption, indicating that Ca2+ competes effectively with Cu2+ for the adsorption sites. The influence of Ph on Cu ...