Show A crop yield doubled by soil treatment two applications have decided advantages although the corn belt states p duce nearly 60 per ce 1 of the ti eions food crop yields in this area a average on only ay about halt half of 0 in they could be it if the soils were pra pi bided vided with enough raw material materIa 4 such as lime and fertilizer elements ele menti according to prof emil beal ot of the soils department of sity ot of wisconsin on most of the soils of the con co belt a heavy initial application a fertilizer and lime Is needed rigin rig now to make up the deficit ot of avail able nutrients in the soil he dc i thirty six bushels per acre cor con yield shown at left heavier fer et application brought 70 bu base els per acre crop shown at right dared this deficit he said always has existed in the poorer solli and has been created through n hau haust stive lve cropping on many ot of ll 11 ta better soils pointed out that heavy 1 it of fertilizer mearn means la is many cases the use of far to div ivi tons of ume lime and the equivalent 1500 pounds ot of 0 20 20 fertilizer per y acre tests in wisconsin he added hall ban proved the value of such heavy ining soil oil treatments thereafter nub mat cenance applications are made in following this system half halad d the fertilizer Is applied and disked in before plowing the other blit Is spread and disked in after ow ing thus the whole plow layer li uniformly treated from top to tit bi torn tom creating a much better ex cz tor for crop production than ato the fertilizer Is applied in one dow dose and not thoroughly with the soil for five or six yein yean afterward |