Call edition 2012

A new edition of the Prize of the Belgian Development Cooperation has been launched. This call is open until March 31st, 2011. You can read in the regulations whether you comply with the criteria for participation.

I would like to submit my application

Geographical Analysis of Risk for Soil Acidification due to Sulphur Dusting on Cashew Trees in Tanzania's Southern Zone

Nathalie COOLS unknown (1998 only) laureate


°1975 Belgium
Bio-engineer Land and Forest Management, Katholieke Universiteit Leuven, Belgium, 1992

Geographical Analysis of Risk for Soil Acidification due to Sulphur Dusting on Cashew Trees in Tanzania's Southern Zone

Very little is understood about the environmental effect of the 100 kg of elemental sulphur which are sprayed annually on cashew trees in Tanzania to control powdery mildew disease. A field survey on farmers' fields was conducted to assess the risk of soil acidification. The study identified the Makonde Plateau as having a high risk of soil acifdication, whereas the soils of the other parts of the Southern Zone seem to be much less vulnerable.
Cashew is a very important cash crop for resource-poor farmers in South-East Tanzania. At present they have no other option than to apply elemental sulphur to control mildew disease. The negative envrionmental effect of this treatment may not only affect cashew but could jeopardise all the intercrops such as cowpea, maize, rice and cassava. The study pointed out that the risk of soil acidification is substantial in certain densely populated areas and has drawn up practical recommendations to curb the problem.