Most cassava starch processing line industrial facilities buy cassava roots from growers in their neighborhood, directly or through agents. Some industrial facilities, however, own their cassava plantations. Modern processing plants usually arrangement various farmers in the region to supply roots. In such situations the manufacturing plant should furnish economic and technical assist with the farmers, and an agronomist ought to be used on help producers develop better production practices and to conduct control research for determining the appropriate varieties, fertilizers, and techniques of insect and disease control for the area.

        In several countries, prices are focused on the foundation of the certain starch content, with a discount or a premium for diversions from that level, which is determined based on the locality as well as varieties. The starch content material within the tubers is determined subjectively from the factory's consultant or objectively by chemical analysis. Summary evaluation is completed by selecting a medium-size root and snapping it in two. If the tuber button snaps with medium force, the crop is generally regarded as mature and also the flesh will show up firm, white and dry. Such roots are considered to possess the maximum starch content of 30 percent. Lowstarch flesh from premature tubers is usually slightly yellow and, even though firm, includes a translucent watery core. If considerable force is necessary to snap the tuber, it is considered to have grown to be woody and the crop to possess passed its prime.

        Chemical analysis of the tubers is a truer way of the determination of starch content, however it takes a lab and certified technicians.

         In many cases' root weight is believed at the farm by simple means which are not entirely accurate and therefore don't reflect the exact yield. Therefore, it's advisable to have special weighing bridges within the factories for recording the weights from the roots in addition to with the final products.