Mapping of total nitrogen,available phosphorous and potassium in Amik Plain,Turkey |
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| Authors: | Veli Uygur Ahmet Irvem Sema Karanlik Rifat Akis |
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| Institution: | (1) Department of Soil Science, Faculty of Agriculture, University of Mustafa Kemal, 31040 Antakya, Hatay, Turkey;(2) Department of Agricultural Structures and Irrigation, Faculty of Agriculture, University of Mustafa Kemal, 31040 Antakya, Hatay, Turkey |
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| Abstract: | Soil nitrogen, phosphorous, and potassium concentrations accurately revealed spatial distribution maps and site-specific management-prone
areas through inverse distance weighting (IDW) method in the Amik Plain, Turkey. Spatial mapping of soil nitrogen, phosphorous,
and potassium is a very severe need to develop an economically and environmentally sound soil management plans. The objectives
of this study were (a) to map spatial variability of total N, available P, and exchangeable-K content of Amik Plain’s soils
and (b) to locate problematic areas requiring site specific management strategies for the nutrient elements. Spatial analyses
of Kjeldhal-N, Olsen-P, and exchangeable-K concentrations of the soils were performed by the IDW method. Mean N content for
surface soils (0–20 cm) was 1.38 g kg−1, available P was 28.19 kg ha−1 and exchangeable-K was 690 kg ha−1 with the differences between maximum and minimum being 7.63 g N kg−1, 242 kg P ha−1, and 2,082 kg K ha−1. For the surface soil, site-specific management-prone areas of Kjeldahl-N, Olsen-P, and exchangeable-K for “low and high + very
high” classes were found to be 20.1–17.8%, 24.7–10.0%, and 4.1–39.6%, respectively. Consequently, lands with excessive nutrient
elements require preventive-leaching practices, whereas nutrient-poor areas need fertilizer applications in favor of increasing
plant production. |
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