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Showing items 1 through 9 of 171.
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Library Resource
Documents de politique et mémoires
Recently, researchers indicated great changes in the chemistry of atmosphere due to faster oxidation of soil organic carbon. The increases of greenhouse gasses especially CO2 concentration can affect climate, plant physiology, microbial activity, soil organic matter, and decomposition. Soil can be a store or source for atmospheric CO2. The amount of soil organic carbon stored in the soil or release to the atmosphere depends on net ecosystem productivity and heterotrophic respiration.
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Library Resource
Documents de politique et mémoires
In this study, land cover maps of Bozcaada district were developed using Landsat satellite images obtained in 2006, 2007 and 2008. In addition to original images (6 band Landsat TM), the new images constituted with image processing techniques were also used. A total of ten images were formed by supervised classification method using principal component analysis (PCA), normalized difference vegetation index (NDVI), and tasseled cap (TC) transformation methods.
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Library Resource
Changes in hydrological cycle have been experienced as the result of the global climate change which may have caused undetermined increase or decrease in the location and reserve of water resources which are already undetermined in various parts of the world.
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Library Resource
Documents de politique et mémoires
The objective of this study was to determine the most suitable method (or methods) to improve in the rangelands around Samsun-Turkey rangelands between 1993 and 1999. The 12 management treatments in this study included control, aeration, burning, herbicide application, fertilization, over-sowing, ploughing + resowing and a combination of all the treatments. A mixture of seeds consisting of alfalfa, sainfoin, smooth bromegrass, orchardgrass and blue wheatgrass was used for oversowing and in the ploughing + resowing plots.
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Library Resource
Documents de politique et mémoires
Public green areas which are significant parts of urban green areas are important for urban recreational activities.
Kentsel ye�il alanlar ve bu alanlar�n �nemli bir b�l�m�n� olu�turan kamusal ye�il alanlar, kentlerin rekreasyonel faaliyetleri i�in �nemli alanlard�r.
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Library Resource
Documents de politique et mémoires
After the rangeland law has been implemented, the areas used for field have been started to be converted to rangelands. A forage mixture of alfalfa, birdsfoot trefoil, perennial ryegrass, and smooth brome was sown in the rangeland of Hacıpehlivan village, Biga, Çanakkale in 2004 fall.
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Library Resource
Today, GIS is used in many areas. One of the most important using area is agriculture and it provides great advantages in this area.
CBS günümüzde birçok alanda kullanılmaktadır. En önemli kullanım alanlarından biri de tarımdır ve bu alanda büyük kolaylıklar sağlamaktadır. CBS ile tarımsal taşınmazların değerlemesinde ortaya çıkan problemler önemli ölçüde çözülebilmektedir.
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Library Resource
Documents de politique et mémoires
In this study, by using cellular analyze method according to ecological criteria, the determination of agricultural land suitability of Research and Practice Farm of Ankara University Agrucultural Faculty Farm and Haymana Research Farm of Central Research Institute for Field Crops lands, which are in Ankara province and Haymana district, was aimed. For this aim, by using Geographical Information Systems(GIS) techniques, the data layers such as some soil properties, topography and irrigation was examined for each land criterion to determine the weighted scale.
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Library Resource
Documents de politique et mémoires
The soils of the Yıldız Mountain, namely Entisols, Mollisols, Inceptisols, Ultisols, and Spodosols, from Poyralı, Yeniceköy, Demirköy and northwest of Igneada that were developed on calcareous sandy sediments, chlorite schists, Pliocene sediments and alluvial materials were studied in this paper.
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Library Resource
Documents de politique et mémoires
Effects of salinity and sodicity on some soil physical properties were discussed in this article. Effects of salinity and sodicity on floculation, dispersion, infiltration, hydraulic conductivity, runoff and seal formation were taken into consideration in assessment. In many studies it is indicated that high natrium concentration of soil decreases infiltration and hydraulic conductivity values and stimulates crust formation and dispersion occurrence associated with many factors such as texture, structure, Ca and Mg concentration in solution.
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