Studies on Phosphorous Dynamics in Soils

The Nitrogen and Phosphorous Cycle in Soils - FSA-2148

Nitrogen exists in soils in many forms and constantly changes from one form to another. The paths that the different forms of nitrogen follow through the ecosystem are collectively called the nitrogen cycle (Figure 1). Understanding how the different pools of nitrogen interact and the processes by which these forms enter and leave the cycle is the subject of continuing study. Nitrogen is found ...

Opportunities for soils studies in iran

Modeling Studies on the Response of Weapon Foundations in Soils

In this report, the author first describes the design of a portable model foundation loading device capable of applying square wave impulses with forces up to 1200 lbs. for durations between 10 and 120 milliseconds. The model loading device is used to simulate the load on the non-recoiling parts of a howitter foundation in both sands and clays. An important part of this program is the compariso...

effect of sulfur and thiobacillus inoculum on phosphorous uptake and yield of wheat in calcareous soils

application of sulfur as a means of lowering soil ph (even if at micro sites) is one way to increase the availability of insoluble nutrients/ effectiveness of elemental sulfur in lowering soil ph depends on the activity of sulfur oxidizing bacteria especially, thiobacillus genus/ to evaluate the possibility of partially substituting sulfur along thiobacillus inoculum for phosphorus and micronut...

Phosphorus Dynamics in Broiler Litter-Amended Soils

Because land application of broiler litter is commonly made in the spring before cropping season and in the fall, it is essential to understand how environmental variations, such as temperature, affect the phosphorus (P) dynamics. A laboratory incubation study was conducted at Waste Management and Forage Research Unit, USDAARS with the objective of determining the effects of temperature and soi...