Soils
- 21
- Ground Cover Plants
- Provides details of over 250 types of plants that can be used for ground cover and to prevent erosion.
- 22
- National Sedimentation Laboratory
- It emphasizes research dealing with soil erosion; transport and deposition of sediment; movement of chemicals on upland areas and in streams; the impact of agricultural practices, in-stream structures, and bank protection on these processes; water quality; and the ecological well-being of streams.
- 23
- National Soil Erosion Research Laboratory
- US Department of Agriculture research lab focusing on fundamental erosion process research, erosion control research and delivery of improved erosion prediction technology.
- 24
- Revised Universal Soil Loss Equation 2 - Overview of RUSLE2
- Computer program that estimates rates of soil erosion caused by rainfall and associated overland flow. Free download available together with documentation and manuals.
- 26
- Soil Erosion Net
- Collection of information on soil erosion from a wide range of scientific disciplines.
- 27
- Soil and Water Conservation Society
- The Soil and Water Conservation Society is an international organization that fosters the science and the art of soil and water conservation to achieve sustained use of land resources.
- 28
- USDA-ARS National Soil Erosion Research Laboratory
- Information regarding: Erosion process research, erosion control research, and delivery of improved erosion prediction technology.
- 29
- Water Erosion Prediction Project (WEPP)
- The WEPP-model, developed by the U.S. Department of Agriculture, is a process-based, distributed model for soil erosion prediction. Model software and documentation can be obtained through this site. [PDF]
- 30
- Preferential Flow (Cornell University)
- A pedagogical resource about preferential flow in soils, for educator, regulator and extension services. Preferential flow are fast water flow, often involved pollutant transport.
- 31
- Soil Physics (Oklahoma State University)
- A collection of models for water flow and solute transport in soils, for scientists, decision makers and students (with theory presentation and exercises)
- 32
- Tutorials in Soil Physics
- These tutorials range in difficulty from college sophomore to the senior/graduate/postdoctoral level. They begin with the basics and extend to a new exact solution to Richards' equation for unsaturated horizontal and vertical flow.
- 33
- Effects of Organic and Inorganic Fertilizers on Soil Fertility and Crop Quality
- Describes the results of a long-term field experiment in Sweden. By Artur Granstedt and Lars Kjellenberg.
- 34
- Fertilizer Application and Placement
- Provides general guidance on the purchase, use and timing of nitrogenous fertilizers and on the application of phosphorus, potassium and sulphur.
- 35
- Fertilizer and Lime Research Center, New Zealand
- Agricultural use and the environmental impact of fertilizer, lime and soil amendments.
- 37
- International Fertilizer Industry Association
- Describes the production, distribution and consumption of fertilizers, their intermediates and raw materials
- 38
- Manures and Fertilizers
- Indian Agricultural Resources. Information about manures, organic, inorganic and biofertilizers.