January 2014

Assessing the Input and Output Flows and Nutrients Balance Analysis at Catchment Level in Northern Ethiopia

Soil fertility depletion in smallholder farms is one of the fundamental biophysical causes for declining use per capita food production in Ethiopia. In the present study, resource flow analysis was made at catchment scale in northern Ethiopia, analyzing nutrient balances. JMP 5, a computer program for statistics and used in applications such as design experiment and scientific research was used to process and to...

Author(s): Gebremedhin Kiros, Mitiku Haile and Girmay Gebresamuel

January 2014

Soil sulfur availability due to mineralization: Soil amended with biogas residues

Sulfur, an essential element for plant growth, has received lesser attention than it deserves. Current inputs of sulfur to agricultural soils from atmospheric deposition have reduced to less than the amount sulfur required by most crops. In such soils the release of sulfur from organic matter is vital for the supply of sulfur. A pot experiment without plant (incubation study) in a green house was conducted at the...

Author(s): Mewael Kiros Assefa, S. von Tucher and Urs Schmidhalter