Now showing items 1-5 of 5
Use of densimetric techniques for fractionating soil organic constituents
Ultrasonic dispersion of soil was used as a pretreatment, prior to densimetric fractionation in a heavy liquid. A 2 to 3 minute sanification period, using a probe type instrument with a 125 watts power output, resulted ...
Phosphorus adsorption by selected clay minerals
The structure of the ionic atmosphere surrounding the clay particles has been presented to show the theoretical effect of certain cations on the adsorption of phosphorus by clay minerals. The various diffuse double layer ...
The effect of moisture stress on plant - available soil phosphorus
In spite of the large amount of research on soil-plant-water systems during the past decade, little information is available on the influence of soil moisture or plant water stress on soil and fertilizer phosphorus ...
The Use of Naturally Occurring C14 to Measure the Persistence of Organic Components in Soil
Applicability of the carbon-dating method of analysis to studies in Soil Science was investigated. Factors affecting the accuracy of the method, e.g. precision, isotopic fractionation, bomb produced C14, 'Suess effect', ...
The use of C14 labeled plant material to measure the turnover of organic residues in soil
This investigation was designed to measure, using C14, the dissimilation of added plant tissue in soil and to study the effect of these additions upon the mineralisation of native soil organic matter. Oat plants were ...