Impact of some plant residues on (vicia faba)l

Two experiments were conducted during 2006 and 2007 to manage the uses of soybean straw residues either by burning, incorporation directly into the soil or incorporated to the soil or irrigation water as a watery extract.Firstly through 2006, four experiments occurred to evaluate the effect of soybean burning ash on soil nitrogen fractions and soil pH, and comparative experiments to evaluate the effect of both Soybean burning ash and soybean straw extract incorporation on