These developments are the basis for the revolution in land resources mapping including soils. Recent advances in remote sensing, invention of Global Positioning System (GPS), Geographical Information Systems (GIS), and spatial and modelling techniques have made it possible to collect, analyse and interpret land resources information at varying spatial and temporal resolutions. The World soil map has contributed a lot in understanding of the distribution of global soil resources, but its usefulness remains limited for land management due to its low resolution. Introduction The publication of the soil map of the World in 1981 paved the way for classifying soils using a widely accepted harmonised criteria and nomenclature at the global scale. A digital soil map should be prepared such that it provides a possibility to extract information at various resolutions according to needs. In the future digital soil mapping should provide room for subsequent upgrading of the soil information as more data become available. Spatial heterogeneity in magnitude of individual soil characteristics was common in all sites. The selection of which ones are critical for a given soil requires detailed analysis supported by field evidence such as experimental data. In certain cases, a few key characteristics determine the soils behaviour while in others the same do not. Topsoil depth, available water capacity, organic carbon content, pH, and bulk density, cation exchange capacity are among the key characteristics that influence the functioning of the studied soils. Emphasis was put on the topsoil characteristics which largely influence the performance of soils in terms of crop production. The selected sites correspond to high potential medium and near-marginal areas for the production of maize. Read moreĪ study of soil characteristics was conducted in three different agro-ecological zones representing the humid, sub humid and semi-arid-sub humid zones in East Africa. The Town and Country Planning Act 1947 established a new and comprehensive planning system under which the county councils and county boroughs were required to prepare development plans which provided a land use framework for the control of day-to-day development and dealt with problems of amenity. A report issued by the Government Office for Science in 2010 highlighted the need for a 'more coherent and consistent approach to guiding land use and management'. consistency and continuity in the framing and execution of national policy in respect of the development and use of land. This demonstrated growing recognition of the need for. Priority was given to devising a planning system in 1940s, which ensured that all the land in the country was subject planning control. He informed that development plans had constituted a core component of British statutory town planning from 1909. Collins shared his views on the development plan coverage in England from 1909-2012.
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