Alternative fertilizer resources
1996
Taye Bekele (IAR, Addis Abeba (Ethiopia))
High needs for and rapidly rising costs of high grade soluble fertilizers, on one hand, and weak financial status of the farmers, on the other hand, are strong imperative for seeking alternative fertilizer sources in Ethiopia. Although much work still needs to be done to develop and test different options, review is made on the potential of some alternative sources. Applications of 12 and 18 t/ha farm yard manure on Holetta red soils were found to be as effective as 100 kg/ha DAP (N18 P20). Two hundred kg of bone-meal was 85% effective as compared with 100 kg/ha DAP. In another experiment at Ginchi, mustard meal as a source of nitrogen for wheat showed better effect than urea. In recent experiment conducted at several locations, ground rock phosphate proved to be economically attractive alternative to the use of more expensive soluble phosphate. Rhizobium inoculation of faba bean at Holetta increased yield to a level which is equivalent to 40 kg/ha N. But very little if any information is given on mycorrhizal inoculation.
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