The research was conducted to study the effect of follow trilogy rainfed Crop rotation for 10 and 20 year and bi irrigated for 10
years in some soil properties in the erea Talbesa ,w'ere taken samples of soil from the village of Talbesa ( the villag
e A krad
Aldasnea for rain fed Crop rotation , the village Knay Alase for irrigated Crop rotation ) which located in the North west of the city
of Homs from depth 0 – 25 cm , 25 – 50 cm .the results showed that a rain fed and irrigated Crop rotation has led to an an
improvement in the physical , chemical and fertility soil characterisitics where it was found : rain fed session of 10 years
to 20 years and each depth , in irrigated crop for each session of the witness shows ;increase in gathered of soil pellets , increase in the proportion of larger granules of 0,05mm , and the change was moral , high pH soil so that approached the moderation , the change was moral , increase the content of soil organic matter , increase the content of phosphorus , potassium , the change was moral and increase the production and the change was moral .
