Show NATURES WORK WITH SOILS important off ce of mineral fertilizers Is to improve physical condi condl tion of land when a soil becomes th thin I 1 n nature does not transport mineral fert fertilizers from some other quarter but pro duces vegetation which increases the soil soils a power to hold moisture when the material has rotted some of the natural store of plant food Is made available through h the de do cay ot of vegetation but the MOE most it imbor tant office of this material Is to im prove the physical condition of the land and its water holding power |