Abstract
This study was conducted with an aim to analyze the spatial variability of soil properties with depth under cement dust pollution areas. In soil there is nutrient variation in different depths, the variations can also affected by the anthropogenic factors. In this study, the nutrient variation between soil depths (0-20cm & 20-40cm) in cement dust pollution fields has been assessed. A total of 72 soil samples from 0-20cm & 20-40cm depths at different distance from the factories (0-500m, 500-1500m & ≈4000m) were collected and analyzed at Holeta agricultural chemistry laboratory. The parameters analyzed includes: major physico-chemical properties (Total Nitrogen, Organic carbon, Potassium, Phosphorus, pH, Moisture, soil texture, Bulk density, SO4-S and Cation Exchange Capacity). One-way ANOVA were used to compare the mean values between experimental fields (distance from the factory and soil depths) with SPSS statistical software. At p<0.05, there is no significance differences is occurs in the analyzed parameters between soil depths. However trends have shown that the PH, Organic carbon, Total Nitrogen, clay content, Phosphorus, Potassium and Sulfur level declines top to down (from 0-20cm to 20-40cm depths). The trends of Soil bulk density increased from top to bottom, this might be due to loading effect. Electric conductivity decline with soil depths near to the factory but increased top to bottom as far from the factories. From the data, the cement dust pollution can influence in nutrient variations and therefore need to monitor to regulate the pollution of emanate dust.
Highlights
Soil is of major importance for life since it represents a source of both water and nutrients for plants, soil-living microorganisms and animals
Horizons may differ in organic matter content, structure, texture, pH, base saturation, cation exchange capacity (CEC), bulk density and water holding capacity, as well as many other soil physical and chemical properties
The objective of this study was to examine the effects of soil depths in nutrient variations on some selected soil properties regarding to the cement dust pollutions
Summary
Soil is of major importance for life since it represents a source of both water and nutrients for plants, soil-living microorganisms and animals. As the interface between the atmosphere, biosphere, and lithosphere, soil undergoes an intense vertical exchange of materials resulting in steep chemical and physical gradients from surface to bedrock. Human management system such as frequent plowing and tillage for the purpose of cultivation, grazing or similar uses changes the proportions of many soil properties with changing depths [2]. Horizons may differ in organic matter content, structure, texture, pH, base saturation, cation exchange capacity (CEC), bulk density and water holding capacity, as well as many other soil physical and chemical properties. According to [3], variability in soil properties at the series level is often caused by small changes in topography that affect the transport and storage of water across and within the soil profile
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