Answer:
little rainfall
Mesopotamians depended on the annual flooding of Tigris and Euphrates rivers
this was similar to the Egyptians
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A soil's physical and chemical properties affect plant growth and soil management. Some important physical and chemical properties of soil are mineral content, texture, cation exchange capacity, bulk density, structure, porosity, organic matter content, carbon-to-ni- trogen ratio, color, depth, fertility, and pH.
That is very true , the South American handbook was found in a library