Arizona republican., 1919-10-21
The biggest and strong est argument for crop rotation and dairying is soil fertility-One
No. )b
cropping of land will take chemical qualities out of ground.
We are quoting the following bulle- tin from the Chicago Dairy Produce, since it gives facts which are directly applicable to conditions in Arizona.
FOOD AND FERTILITY

A Matter of conservation-BuIetn By G. L. Mckay
 The necessity for food and the important has played in winning the worlds has agriculture higher plane than it has attained history That all industries must depend agriculture has been brought home the nations of this world in the gigantic struggle, foreby than before.
 When soil in the great central in virgin contained all the elements necessary produce When it was put under cultivation the early settler little thought conservation of fertility. The dinuton in the yield from year year. good been written retaining farms where the fertility has been exhausted This is slow expensive process. might who has spent his early manhood in riotous living He reform but he will be the To preserve human race it is necessary that we must soil fertility. We have only of land fresh crop of new born babes every year. that will be the and of the future. They like will depend on the soil for sustenance.
 Dayins and keeping of live stock tend agriculture than other line of agricultural pursuit. tnvai grain farming in places has left behind trail of depleted soil when carried for too long time which has resulted in ruined farms and abandoned homes
 THREE PROBLEMS
 Looking at permanent agriculture from practical stand point there three problems that confront same problems concern the people of all civilized countries First is the economical production of food products for consuming public. Second preventing lack of for food products in such will not deterorate in quality Third conservation of the soil for future generations.
 The late Governor Hoard of Wisconsin of the advanced thinkers along agricultural lines this has probably produced He the following defn ton o tanner as, "a man who operates farm in such that he left in better condition than it when he took it." In other words he added fertility he from it. think the was good because the be accomplished Statistics available showing that where farming has been carried many generations the land has become productive, and yield of grain has actually increased while country yield has been diminishing.
 Fertility of the soil is nexhaustibe self per- petuating. Soil fertility be mined soil, minerals be mined of the earth. When the fertility of the soil has decreased beyond point of cultivation becomes too farming profitable and results in abandoned farms This fact been repeatedly demonstrated in the history modern agriculture.
 IMPROVE FERTILITY
 nd innro so7 The investigations this subject clear There are four things needed under existing conditions to supply directly indirectly to agricultural lands vegetable matter or humus phosphorus, nitrogen and potash Dairy farming seems supply practically all the elements for the of the soil Particularly true in butter production the skinned milk the fed animals thus being returned the has been fre- qusny said that the who is producing butter selling air. sunshine and rain, this founed scientific facts mistaken idea prevails the minds of people rseardns the growth of esue crops such as alfalfa and clover Some imagine that all that necessary supply the soil with nitrogen alfalfa clover every the atmosphere but should not forget that their down Into the ground much further than other plants E peeialb is this true of alfalfa and thus poversh only the surface soil but the subsciI we'll
 The enriehns of the soil through growth of the eaues does not come so much from the actual growth of esues the so in the feeding of them returning ihe to the soil The nitrogen esune extract from the air is almost all found the of the hay; SO with mineral ingredients that extracted from sub-so These returned to the soil manure and it's prodsetiveness Is thus maintained
 Our farm experts are practical men who KNOW BY DOING" just how best to care for stock and arrange crops, buildings and all other farm matters. They will be glad to assist any farmer or dairyman free of charge. Call, write or phone.
 Intelligence Department
 Pacific Creamery Go.
 237 North Central Avenue.