Bamboo rhizome and root system binds the soil and stops erosion. Sloping country can be used for growing bamboo, freeing up flat land for other crops. If at all possible, shape the site with contour drains to manipulate all of the available water, either from direct rainfall or runoff flowing onto the property. At the same time, providing for access and ease of maintenance for harvesting etc.
The objective being to keep the active water either slowly moving through the soil, towards the ridges, or runoff directed to storage dams for later use. Contour ripping to direct water into the sub-soil.