Show Soil Fertility In the rich farming area that starts in New York and Pennsylvania Pennsyl Pennsyl- Pennsylvania Pennsylvania vania and runs west through Iowa and the eastern fringes of the plains country fertility has declined con con- Studies in Ohio show how that that lands cropped from 50 to 75 years years- have lost 35 per f their original original original nal fertility Sixty years of cropping has taken away a third of the fertility fertility fertility fer fer- of farm lands in Missouri In Kansas 30 years of cropping has cost 25 per cent In the five states of Illinois Missouri Missouri Missouri Mis Mis- Iowa Minnesota and Wisconsin Wiscon sin farmers have about doubled their use of commercial fertilizer inthe inthe in inthe the last decade and increased their U of lime sevenfold A good crop rotation stands as the first Drat means of halting stealing soil-stealing it is said and a strong legume is of great ireat importance Applications of lime line are often required to overcome deficiencies that interfere with growing grow grow- ing ins legumes |