Digested sludge contains valuable crop nutrients but these are largely lost because current application techniques limit where and when it can be applied. Soil injection to depths in excess of 150 mm to reduce odour problems ...

Egypts population was projected to increase from 20 million in the 1960s to 67 million by 2000. With this increase in the population, an increase in food production of 200% to 300% is become necessary to meet food ...