CARTOGRAPHIC MODELING OF POTASSIUM CONTENT IN THE SOILS OF ZDOLBUNIV DISTRICT OF RIVNE REGION

Abstract

Potassium content is one of the main agrochemical properties of soil that has a significant impact on the quality and yield of crops. The aim of the study is to map the potassium content of soils in Zdolbuniv district, one of the largest and most agriculturally developed regions of Rivne oblast. Based on the results of the last three rounds of scheduled agrochemical certification of agricultural land conducted by the Rivne branch of the State Soil Conservation Service, a database was created, thematic maps were drawn up using ArcMap software as of 2007, 2012, and 2017, and corresponding diagrams of the dynamics of weighted average potassium content in soil were constructed. It was established that the weighted average potassium content throughout the entire period in the surveyed area ranged from 55 mg/kg to 159 mg/kg of soil, i.e. their numerical values according to the qualitative classification corresponded to low, medium and high levels. The territories of Buderazh, Bohdashivka, Pivcha and Dermanske First Village Councils were identified where the potassium capacity in the soil is not optimal. Recommendations for improving the situation in these areas are given. The created models help to identify the spatial and temporal features of the distribution of this important macroelement and, with the involvement of other additional materials, to make informed decisions on agrochemical land management measures both in the context of former village councils and individual agricultural formations or fields.