The study about the adsorption of phosphate on four variable charge soils and some minerals revealed that two stage adsorption appeared in the adsorption isothe
A new method was proposed for study of organic reducing substances in soils.According to the theoretical relationship between the voltammetric behaviors and red
Studies have been made,by ^15N-tracer technique on nitrogen loss resulting from adding amorphous manganese oxide to NH4^+-N medium under anaerobic conditions.Th
Denitrification losses measured by direct method (measuring the evolution of (N2+N2O)-^15N) were compared with the apparent denitrification losses (calculated f
This paper has investigated the ratios of closely related elements such as Mn,Cr,V,Ni,Co,Cu,Pb,Cd,Ba,Sr,La and Ce in the major soils of China,and the factors af
<正> The rice fields in China amount to 25.4 million hectares of which low yield paddy soils areabout 26%(Xu,1981;Xiao,1981).One of the most important causes of
The effect of application of pig manure (PM) on the structural characteristics of humic acids (HAs) of brown soil was studied in field and incubation experiment
Results from laboratory experiments indicated that the concentrations and toxicities of both water-soluble and 0.1 M HCl-extractable Cu and Cd from soils were i
A K^+-selective electrode and a Na^+-selective electrode were used to construct a measuring cell without liquid-junction for the determination of the ion activ