Show MANURE IN CROP ROTATIONS I 1 increased yields secured in F expert I 1 merits ments at wesl wes virginia and ohio experiment stations the il agricultural rl cultural value of manure usually is greater than the plant food value for example the application of 12 tons tong of manure a year tor for 15 years at th the west virginia experiment station gave increased crop yields valued at 40 an acre a year or a ton toil for the manure used during a period of ten ye years ars the ohio experiment peri ment station has obtained an increase of crops valued at a ton for cor the manure used the application was made at the rate of eight tons of manure an acre during a five year rotation of corn wheat oats oat clover and timothy two applications of four tons each were ande on ono for corn and one for clover manure used in connect connection lon with continuous grain cropping did not maintain the yields hut but when used in connection with crop rotation the yields of all crops were increased |