Chemical composition of agricultural supplies used in Brazilian organic fruticulture.

摘要

The current study aimed to determine the chemical composition of agricultural supplies used in organic fruticulture in Brazil to identify potential risks from chemical contamination and to provide information for traceability. The nutrient found in highest concentrations was Ca. Some agricultural supplies presented K, Co, Fe and Zn at levels comparable to fertilizers used in conventional agriculture. In general, the evaluated agricultural supplies were adequate for use in organic fruticulture, with a few exceptions of chemical elements presenting concentrations close to the maximum limits set by legislation.