The use of gypsiferous mine water for irrigation of agricultural crops is a promising technology that could solve problems related to both shortage of irrigation water and disposal of effluent mine drainage. The long-term effect of irrigation with lime-treated acid mine drainage on soil properties and catchment salt load was investigated. The soil water–salt balance-crop growth model (SWB) and ...

We examined the consequences of soil erosion processes following deforestation and long-term pasture establishment for chemical physical properties Fe isotope compositions within two distinct areas in Eastern Central parts Amazonia (near Rio Capim, Para, Brazil Lake Balbina/Rio Uatuma, Amazonas, Brazil). For each area studied, soils selected under forest cover or after recent slash-and-burn pra...

Agriculture in the humid tropics is mostly limited by low soil fertility and invasion of weeds. The nutrient retention capacity of most soils is low and applied mineral fertilizers are rapidly leached into subsoil. Small farmers can not afford continuous mineral fertilizer input to compensate for the losses. Hence the dominating agricultural praxis is shifting cultivation accompanied with slash...