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Efficient fertilizer use in acid upland soils of the humid tropics









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    Book (stand-alone)
    Impact on soils of fast-growing species in lowland humid tropics 1980
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    The impact of monoculture plantations of fast growing tree species on soils of the lowland humid tropics has been assessed by comparing soil conditions under natural forest, with those under plantations. The amount of nutrients contained in whole trees or in the stemwood at particular ages has been measured, as well as soil total and available reserves, in an attempt to determine the effect of regular harvesting on soil potential in future rotations.
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    Book (stand-alone)
    Efficiency of soil and fertilizer phosphorus use
    Reconciling changing concepts of soil phosphorus behaviour with agronomic information
    2008
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    The efficient use of fertilizer phosphorus (P) is important for three main reasons. First, phosphate rock, from which P fertilizers are manufactured, is a finite, nonrenewable resource, and it must be used efficiently in order to maximize its life span. Second, there is a need to maintain and improve the P status of many soils for the growth of crops for food, fibre and bioenergy. This is particularly important in least-developed countries (LDCs) that need to increase food production a nd improve rural livelihoods. Third, the transfer of soil P (derived from fertilizers and organic manures) is a major cause of P-induced eutrophication in surface waters. This causes undesirable changes in their ecology, resulting in a decline in the provision of eco-services, often with serious economic consequences. This report reviews, analyses and synthesizes information on the efficient use of soil and fertilizer P. It presents information on the plant availability of soil and fertilizer P, with an emphasis on soil–plant interactions. The focus is on the changing concepts of the behaviour of both soil and fertilizer P and on the need to define and assess their recovery and, thus, P-use efficiency, more appropriately. The report also outlines strategies for improving P-use efficiency.
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    Document
    Using Soil Maps to Promote Efficient Use of Fertilizers
    Learning from the Ethiopian Experience
    2022
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