Spatial Variability of Soil Fertility Parameters in the Area of Monitoring Network for Study of Vertisols Karnobat

M. Stoyanova, V. Koutev

Abstract: Soil monitoring programs in European countries are developing very intensively. It is due to the understanding that soils are unrecoverable resource at exposures exceeding the tolerance of the soil, and that monitoring their quality is equally important issue as the monitoring of water and air.
Studies of heavy soils are important part of soil fertility changes monitoring.
Based on the available soil-climatic information in the town of Karnobat a permanent monitoring network was established. Currently, the network consists of 36 points distributed in regular grid on a Vertisols. Strong correlation of spatial variability was observed between P and K. Phosphorus and potassium are dependent on soil formation processes and prevailing parent rock. Nitrogen is not strongly related with PK. It is due to the nitrogen fertiliser application.

Keywords: monitoring network; nitrogen; phosphorus; potassium; spatial variability; Vertisols

Date published: 2016-12-05