B P International

Thallium (Tl) is a non-essential element for human being and is considered as a highly toxic trace element at a concentration above 2 µg/L. To assess the source of thallium contamination in ground and surface waters in the locality of Yamtenga village (11°43'35.1'' N and 00°11'50.8'' W, Burkina Faso), chemical analyzes of thallium concentrations in the soils of Yamtenga village along with geological descriptions (geological map and hydrographic watershed map of the studied area) were undertaken. We found thallium concentrations in this area ranging from 1.61 mg / kg to 404.75 mg / kg. A zoned mineralization in thallium, due to the geological structure of the locality, was established in the soils, suggesting that the source of thallium contamination in ground and surface waters in the locality of Yamtenga village is of natural origin. The concentration of some heavy metals (Pb, Zn, Cd, Cu and Mn) were also evaluated in the soils of Yamtenga village and their co...

Nutrient cycling for crop production is desired to reduce environment impact, enhance nutrients use efficiency and reduce cost production.  Several agriculture techniques are available to support this possibility for grower and so give the sustainable production driving for the better nutrient using. Conservation Agriculture is a current system for crop production that provide this possibility and it is based in three agronomic principles that are minimum disturbance of soil or no-tillage for crop establishment, permanent residue on soil surface and crop rotation. In this context, cover crops is use as crop rotation in vegetable production and this possibilities the nutrients cycling, straw production to protect soil surface and improving in soil fertility, among another benefits to agricultural environment. Because your vigorous root growth they achieve nutrients that were being lost by leaching in the soil profile e come back to their shoot recycling nutrients into the system....