Vol. 7, Issue 1, Part A (2025)

Since the beginning of the twenty-first century, Iraq has witnessed the introduction of many new plants, especially trees and shrubs, for multiple purposes, the most important of which is landscaping, as well as economic and environmental goals. Among these plants that have recently spread in the Iraqi environment are Moringa, Conocarpus, and Leucaena. This study aims to discover the possibility of using the leaves of these trees, in addition to the Eucalyptus tree and the Sesbania shrub, in making compost, improving soil properties, supporting the microbial community in the rhizosphere, and the effect of this on plant growth. Leaf compost was prepared separately for each species and the efficiency of this fertilizer in improving the growth and yield of wheat plants was tested. The treatment of compost of Leucaena LC and Sesbania leaves SC gave a positive and stimulating effect on the microbial community in the soil, addition of Moringa compost MC led to a reduction in the microbial community. Regarding the growth of wheat plants, the SC and MC treatments had the highest effect in improving growth rates and production. This study concluded the environmental importance of Leucaena, Moringa and Sesbania trees to improve the properties of Iraqi soils that suffer from salinity and high alkalinity, as well as the possibility of using these trees and shrubs in intercropping with economic crops as one of the sustainable agricultural methods.