Spatial modeling of soil micronutrient availability and its relationship with physical attributes for agricultural sustainability
Keywords:
Soil Texture, Micronutrient Retention, Agricultural SustainabilityAbstract
This study analyzes the distribution and correlation between micronutrients and soil physical attributes in the Sorocabuçu River Basin (SRB), located in Ibiúna, São Paulo (SP), covering an area of 202.67 km². Granulometric and chemical analyses were performed on soil samples from different land use classes, focusing on the quantification of the micronutrients boron (B), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn). Spatial modeling was conducted using the Inverse Distance Weighted (IDW) method, and the soil erodibility factor (K) was calculated to assess erosion susceptibility. The results indicate variations in the average concentrations of micronutrients: B from 0.15% to 0.24%, Cu from 0.22% to 1.49%, Fe from 36.98% to 127.49%, Mn from 1.92% to 8.22%, and Zn from 0.34% to 1.67%, reflecting spatial heterogeneity and different levels of availability. The correlation between micronutrients and soil texture reveals that clayey soils retain higher amounts of micronutrients, while the silt fraction also plays a role, emphasizing the influence of physical properties on micronutrient availability. These findings have implications for soil fertility and erosion risk, reinforcing the need for management practices that integrate soil conservation and fertilization to ensure agricultural sustainability.
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