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Nutrient supplies and crop yields: response curves. Liebig's "law of the minimum". Mitscherlich's "law of physiological relationships or "effect law of the growth factor". Factors affecting the shape of response curves. Limitations of response functions. Other response functions…
Phosphorus (P) and zinc (Zn) deficiencies are common in calcareous soils. Calcareous soils make up some of the most productive agricultural lands in the Mandozai district of the Khost province in southeastern Afghanistan and little is known about the phosphorus and zinc fertilit…
Small-scale (2–5 ha) farmers in Sepunggur, Sumatra, Indonesia, use fire because it is the cheapest and quickest tool for land clearing. Other benefits, as perceived by the farmers, are an increased soil fertility ascribed to ash addition, soil structure improvement, and a reduct…
In western Niger soil fertility depletion threatens food production. Cattle management and manure are used to maintain soil fertility. However, cattle population and insufficient feed limit the use of manure for improving soil fertility. The purpose of this research was to asses…
The study was carried out in the eastern region of the Sudan to measure nutrients and biomass recovery in abandoned mechanized farms. Thirty-five abandoned farms in four mechanized farm areas and 11 forest sites in three forest reserves were selected. Each farm and forest site w…
This is a study of the relationship between livelihood strategies, soil fertility investment and land use in the village of Fandou Beri, southwestern Niger. The aim has been to place alleged soil degradation in a specific, differentiated and dynamic local context. The village, w…
The presence or absence of soil organic matter (SOM) has important implications for agricultural productivity. It also could have significant implications for global climate due to its role as a resource/sink of carbon. It is important to understand the accumulation or loss of S…
"Soil and Fertilizers: Managing the Environmental Footprint presents strategies to improve soil health by reducing the rate of fertilizer input while maintaining high agronomic yields. It is estimated that fertilizer use supported nearly half of global births in 2008. In a conte…
Soil and Fertilizers: Managing the Environmental Footprint presents strategies to improve soil health by reducing the rate of fertilizer input while maintaining high agronomic yields. It is estimated that fertilizer use supported nearly half of global births in 2008. In a contex…
