To the extent that "processing" farm products is taken from the farm and performed at the community center, or that there is a division of labor, the local community is thereby strengthened, for its life is more highly organized; it is more inter-dependent. An interesting phase of the relation of the community to the farm business is in the protection of crops and animals from insect pests and diseases. If one man plants his wheat late enough to escape the Hessian fly his crop is benefited, but if all in a community do so the subsequent infection is greatly reduced with consequent advantage to all. The chief obstacle preventing the successful combating of the cotton boll weevil in the South has been the difficulty of securing united action in the necessary cultural measures for its control. Most striking results have been secured in the eradication of the Texas Fever Tick from large areas of the South, although this has been carried on using the county as a unit; for many purposes in the South the county is practically a community. Some of the best community work in this field has been in the West in poisoning ground squirrels and other injurious rodents and in rabbit drives. Although the poisoning campaigns are conducted over whole counties or several counties, they are organized by communities and their success is possible only because every one in the community does his part. Whenever the farmers of a community become convinced that they are unable to fight a pest or disease individually, but can do so if they act collectively so that a sufficiently large area is treated as to prevent immediate re-infection, a new community bond has been established. Whether these activities are carried on by communities of the exact nature previously defined (page 10) is immaterial. The significant fact is that their people are learning how to act together in the common defense, for it was the common defense which first compelled mankind to live in communities, and it is defense for one purpose or another which is ever compelling the people of a locality to act together. Farm management experts point out the practical value to the farmer of community experience with regard to methods of farm practice peculiarly adapted to local climate, soils, and markets. If one is going into dairying he can learn little from his neighbors if he locates in a fruit section, but in a dairy section he may constantly learn from the common experience. Dr. G. F. Warren says: