Department of Physics, Chemistry and Biology (IFM)

• We have analyzed spatial data on crops areas, livestock and human population from data bases of boards of agriculture and boards of Statistic. 
• We have collected nutrient demand of different crops (per hectare) and excretions by humans and livestock (per individual) from literature.
• We have used following equation for calculating nutrient balance at selected spatial scale:

                Nutrients Balance = nutrient in excrements (of human and livestock) - Nutrient demand by crops

• We have used Microsoft Excel (Visual Basic programming), Microsoft Access and Arc map (10.1) in the analysis.