DTPA-extractable micronutrients: A geostatistical study from Ordu, Turkey

Abstract

In present study, geostatistical techniques were applied to assess the spatial variabilityof DTPA-extractable micronutrients which are named heavy metals as chemistry suchas; iron (Fe), copper (Cu), manganese (Mn) and zinc (Zn) in the non-tillaged layer inOrdu province- Altınordu district, Black sea region, Eastern part of Turkey. Study areawas approximately 40095.8 ha where was divided into grids with 2500 x 2500 mspacing with including 66 sampling points from 0-0.2 m in depth. Soil reaction (pH)was the least variable property while electrical conductivity (EC) was the mostvariable. While the highest nugget effect occurred for Ext-Cu with moderate spatialdependence, the lowest for Ext-Mn with strong spatial dependence. The greatest rangeof influence (17424 m) occurred for Ext-Cu and the least range (692 m) for Ext-Zn.