Effects of Burning Crop Residues and Drenched the Soil with Water on the Populations of the Bacteria, Thiobacillus spp. and the Fungus, Trichoderma spp. in the Open Fields

Burning crop residues and/or drenched fields with water is one of the most common methods for controlling weeds and plant diseases in Iraq that farmers use after wheat barley harvest season every year. It known soil contains many microorganisms coexist roots plants, such as fungi symbiotic bacteria. This study aimed to show effect burning or on population density Trichoderma spp. fungus Thiobacillus The results experiment showed process negatively affects soil, which live at a level 10 cm below surface. indicated there was clear significant difference between treatments, like reduced tested experiments.