It is the purpose of this chapter to promote, encourage and assist the united action of the farmers of the state, through co-operative methods in obtaining necessary moneys and credits for the members of the associations contemplated herein during a longer period of time and at a lower rate of interest than is usually obtainable by those engaged in agricultural, garden, and orchard production, the growing of all kinds of live stock, of beef cattle, and of dairying cattle, and of breeding cattle, sheep and hogs, and all kinds of domestic animals.