THE SPATIAL VARIABILITY OF UREASE ACTIVITY OF SURFACE AGRICULTURAL SOILS WITHIN AN URBAN AREA

Soil enzymes play a major role in the mineralization processes of organic materials. The soil enzymes originate from animal, plant and microbial sources and the resulting soil biological activity including the metabolic processes of all these organisms. Information on soil enzyme activities used to determine soil microbiological characteristics are very important for soil quality and healthy

THE SPATIAL VARIABILITY OF UREASE ACTIVITY OF SURFACE AGRICULTURAL SOILS WITHIN AN URBAN AREA

Soil enzymes play a major role in the mineralization processes of organic materials. The soil enzymes originate from animal, plant and microbial sources and the resulting soil biological activity including the metabolic processes of all these organisms. Information on soil enzyme activities used to determine soil microbiological characteristics are very important for soil quality and healthy

The Spatial Variability of Soil Dehydrogenase Activity: A Survey in Urban Soils

Information on soil microorganisms and their activity used to determine microbiological characteristics are very important for soil quality and productivity. Studies of enzyme activities provide information on the biochemical processes occurring in soil. There is growing evidence that soil biological parameters may be potential and sensitive indicators of soil ecological conditions and soil management. Soil microbiological parameters may be evaluated statistically due to application of geostatistical methods to soil science. Measurement of soil dehydrogenase activity (DHA) has been used to establish indices of soil microbiological activity. The objective of this study was to assess the spatial variability of the DHA using the geostatistics in the topsoils of an urban area. DHA along a transect in an urban area was determined using 39 soil samples from the upper 20 cm of soil varied from 10.7-258.4 μg TPF g-1 soil respectively. The spherical model fits the best semivariogram model for DHA and exhibited spatial dependence with range of influence of approximately 48.2 km

The Spatial Variability of Soil Dehydrogenase Activity: A Survey in Urban Soils

Information on soil microorganisms and their activity used to determine microbiological characteristics are very important for soil quality and productivity. Studies of enzyme activities provide information on the biochemical processes occurring in soil. There is growing evidence that soil biological parameters may be potential and sensitive indicators of soil ecological conditions and soil management. Soil microbiological parameters may be evaluated statistically due to application of geostatistical methods to soil science. Measurement of soil dehydrogenase activity (DHA) has been used to establish indices of soil microbiological activity. The objective of this study was to assess the spatial variability of the DHA using the geostatistics in the topsoils of an urban area. DHA along a transect in an urban area was determined using 39 soil samples from the upper 20 cm of soil varied from 10.7-258.4 μg TPF g-1 soil respectively. The spherical model fits the best semivariogram model for DHA and exhibited spatial dependence with range of influence of approximately 48.2 km

Content of heavy metals in Haplic Chernozem under conditions of agrogenesis

The paper presents the results of a long-term study on the content and distribution of heavy metals in Haplic Chernozem of agrocenoses in southern zone of Rostov Region. The impact of various agricultural technologies traditional (using moldboard ploughing) and resource-saving (minimum and No-till) on accumulation and mobility of Pb, Zn, Cu in Haplic Chernozem in winter wheat cultivation is considered. The total content of Pb, Zn, Cu in the winter wheat areas corresponds to the background level and does not exceed permissible concentrations. Low mobility of elements (Pb 2.0-3.0%; Zn and Cu up to 1.0% as a percentage of their total forms) is a regional soil feature. In addition, the low availability of Zn and Cu in soils is due to their removal with the crops in the absence of micronutrient fertilizer replenishment. The significant role of soil organic matter in the accumulation of both total and mobile forms of heavy metals in soil has been confirmed. The intensity of the cultivation methods used has a significant effect on the total content of Zn, Cu and on the mobility of Pb, Zn, Cu in Haplic Chernozem