Rhizospheric Effects of Three Citrus Rootstocks on Some Biological Properties and Phosphorus Fractions in a Calcareous Soil

Nemaguard has been the workhorse rootstock of the California almond industry for many decades. It is well adapted to the well-drained, non-calcareous loam and sandy loam soils common throughout the San Joaquin Valley. Nemaguard is vigorous, immune to rootknot nematode, compatible with all almond varieties, doesn’t sucker much, has decent anchorage and is easy to grow at the nursery. However, th...

ABS~CT Particle-size analyses of brickearth and Clay-with-flints from Kent, England, are presented. A calcareous sample of brickearth is comparable to loess. In th~ clay fraction, there is more illite (or glauconite) than kaolin; and there is some chlorite. The clay fraction of the Clay-withflints consists of smectite, illite and quartz and is probably derived directly from the Chalk. Black san...

Changes in Nickel Fractions as Affected by Aging and Vermicompost Zeolite Application Two Calcareous Soils with Different Texture

C of wetlands is often highly problematic due to the need to consider soil, plant, and Calcareous wetlands are of great interest in conservation biology. Previous research has suggested that there are significant differences hydrologic factors as fundamental components of these in soil microbial N cycle processes between calcareous wetlands develecosystems (Bridgham et al., 1996). The term wetl...

A better understanding of reservoir densification mechanisms is very important for petroleum exploration and controlling the quality distribution in low-permeability reservoirs. Low porosity low permeability, difficult reconstruction, economic infeasibility are factors restricting its efficient production. Systematic analysis was performed to study evolution different microfacies deltaic deposi...