Nitrapyrin project
The objectives of this project are to study the effect of spring addition of Nitrapyrin on the yield of corn grain and nitrogen recovery in the harvested portion of the crop. Sources of nitrogen used in the study are liquid urea ammonium nitrate (32% N) and liquid swine manure. The project includes a large field where we will collect data using remote sensing techniques.

Specific Site Manure Application
Using GPS and GIS software this project approach to study the reliability of applying manure using those tools in terms of plant response and changes in soil nitrogen.

Soil phosphorus and molybdenum behavior after applying liquid manure and sewage sludge
This project is being conducted to study the effect of addition of liquid swine manure and sewage sludge on the forms of phosphorus in soils and to find if addition of biosolids to soils increases plant

Assessing of soil phosphorus status under different agronomic land-use
An approach for studying the spatial distribution of soil P forms in the soil. This research is carrying out in Costa Rica, Central America in an Andisol under different tropical cropping systems.