The arbuscular mycorrhizal fungi (AMF) are ubiquitous establishing symbiosis with a large number of plants in spite of soil contamination with heavy metals.This study aimed to evaluate AMF occurrence and diversity in soils of four locations cultivated with grass species and contaminated with heavy metals as a result of Zn extraction and industrialization. AMFs were found in all locations, with species predominance being affected by heavy metal concentration in soil. Twenty one species were identified, belonging to the following genus: […]

The objectives of this study were to evaluate the parameters from isotherms of Freundlich and Langmüir that best reflect the adsorption of heavy metals in weathered soils, and to identify the relationship between the selected parameters and the chemical, physical and mineralogical attributes of twelve representative soil classes from Brazil.The soils were collected by EMBRAPA-CNPS during various surveys in the Southern, Southeastern and Northern areas of Brazil.The correlation coefficient among dependent variables, obtained through the isotherms of adsorption (parameters of […]

Knowing the susceptibility of a soil to compaction is important to adjust soil management, tillage practices, and traffic to cause minimal detrimental effects on soil properties. The objective of this study was to determine the preconsolidation pressure (σ’p) and the compression index (Cc) at two depths of two soils under no-tillage and conventional tillage, including a wide variation of the state of compaction. Undisturbed soil samples were collected with rings (5.4cm wide and 2.0cm high), at 0 to 2 and […]