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Show Provide Land With Nitrogen Regularly Corn Yield Will Be Materially Increased X7'HILE farmers can establish a "soil nitrogen bank account," t is necessary that they manage lie land on the basis of small nitro-jen nitro-jen deposits made regularly for Adthdrawals in the immediate future, fu-ture, rather than on large deposits iesigned to build huge reserves for jse over long periods of time, ac-:ording ac-:ording to F. C. Bauer, professor f soil fertility of the University of Illinois. Professor Bauer declared that experiments ex-periments indicated that nitrogen ne of the most essential plant food ilements cannot be amassed in arge reserves in the soil for use luring succeeding years of crop pro-luction. pro-luction. Nitrogen supplies necessary to se-:ure se-:ure attainable yields may be re-itored re-itored to the soil previous to grow-ng grow-ng crops which have large nitro-len nitro-len requirements, he added. Crop otations must be planned so as to irovide legumes for transferring at-nospheric at-nospheric nitrogen to the soil either lirectly or through livestock feed-tig feed-tig and the use of manure. Such otations do much to maintain nitro-;en nitro-;en supplies of the soil, if desirable egumes are seeded on the same leld once every four or Ave years, ie pointed out. Professor Bauer cited results at he Aledo Soil experiment field in Mercer county. Here, during the ! j ast 34 years, urrtceated land has i veraged 58 bushels of corn in a our-year rotation, consisting chiefly f corn the first two years followed y oats and wheat in the absence of egume crops. The quality and iurability of the soil is evident in he yield of 61 bushels obtained dur-ng dur-ng the past four years. But when iweet clover was seeded in the vheat and plowed under as green nanure, the long-time average yield jf corn increased from 58 to 78 jushels and from 61 to 102 bushels n acre during the past four years. Bauer attributes the increases tn ield to the favorable influence f sweet clover on the nitrogen sup-jlying sup-jlying power of the soiL |