Nutrient use and nutrient cycling in topical cropping systems
Improved phosphorus usage
Agronomic measures for increasing P availability to crops (Abstract)
Mobilization of soil and fertilizer phosphate by cover crops (Abstract)
Fitting soybean and cowpea genotypes into cropping systems of low-available phosphorus and high aluminium acid soils of southern Cameroon (Abstract PhD thesis)
Improved nitrogen usage
Genetic and crop-physiological basis of nitrogen efficiency in tropical maize: Field studies (Abstract PhD thesis)
Adaption to acid soils
http://www.maizeforacidsoils.com/
Fitting maize into sustainable cropping systems on acid soils of the tropics (Article)
Greenhouse cultivation of tomato in the tropics
Effects of greenhouse cooling method on growth, fruit yield and quality of tomato (Solanum lycopersicum L.) in a tropical climate (Abstract)
Blossom-end rot and fruit cracking of tomato grown in net-covered greenhouses in Central Thailand can partly be corrected by calcium and boron sprays (Abstract)