1-Using extracts of medical plants in the resistance of some pathogenic bacteria. 2 - Combating environmental pollution and the attention that using bio-fertilizer in agriculture in order to reduce mineral fertilization. 3 - Use of micro-organisms in the resistance of biological objects with the damage and toxicity, which directly affect the agricultural economy and technological cooperation. 4 - Use of micro-organisms in the production of substances that have a role in agricultural technology, industrial, and industrial microbiology