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Displaying 616 - 620 of 661Evaluating the Effect of Nutrient Levels of Major Soil Types on the Productivity of Wheatlands in Hungary
Soil nutrient status is one of the most important constituents of land productivity. The research presented in this article is aimed at describing the influence of nitrogen, phosphorous, and potassium availability on crop yields across the major soil types of Hungary, under different climatic conditions. For this purpose, historical times series data from a 5-year period (1985–1989) regarding soil, land management, and crop yield of more than 80,000 fields, representing approximately 4 million ha of arable land, were statistically analyzed.
Effects of administrative land-use and technical land-form constraints on timber production at the landscape level
This study quantified, across a landscape in Eastern Finland, the influence of administrative land-use and technical land-form constraints on timber production. Spatially explicit data about the nature conservation areas, land use plans and steep slopes were integrated with Multi-source National Forest Inventory (MS-NFI) data. The Finnish forestry model MELA was used in the calculations related to updating forest data and estimating different scenarios of timber production with and without constraints.
Assessing the short-term impacts of changing grazing regime at the landscape scale with remote sensing
Livestock grazing is an important form of land use, affecting ecosystems worldwide. In ecoregions that evolved with low densities of large ungulates, such as those in the western United States, there is ongoing debate as to the appropriate concentrations of livestock that can be sustained. Limited landscape-scale monitoring makes it difficult to pinpoint the landscape-scale impacts of livestock on ecosystems.
Modelling the impact of land-cover change on potential soil loss in the Taita Hills, Kenya, between 1987 and 2003 using remote-sensing and geospatial data
In sub-Saharan Africa, natural vegetation is being transformed into agricultural lands at a fast rate, endangering ecosystem services and increasing soil-loss potential, which may trigger land degradation. For the Taita Hills study area in Kenya, multi-temporal land-cover models of 1987, 1999 and 2003, derived from Satellite Pour l'Observation de la Terre (SPOT) imagery using a multi-scale segmentation/object relationship modelling (MSS/ORM) methodology and a rainfall layer, a digital elevation model (DEM) and a digital soil map were applied to model potential soil loss.
Environmental impact assessment, land degradation and remediation in Nigeria: current problems and implications for future global change in agricultural and mining areas
Natural and anthropogenic processes and products of mining affect quality of life in highly mineralised areas, such as the derelict Enyigba-Abakaliki agriculture-oriented lead–zinc mining area, which has degradation of land and groundwater resources. This study establishes that Nigeria and other developing nations should maximise the benefits and mitigate the negative impacts of adverse natural and mining activities so as to achieve poverty alleviation.