216 



STATE BOARD OF AGRICULTURE. 



TABLE V. — Yield per acre of plots in first series, planted in uniform crops, during 

 1D06-'07-'08, after 10 years in rotation of crops. 



Plot numbers. 



Rotation during 10 year period. 



1906, 

 1907,1908, 



total 



corn, oats 



and wheat. 



1 



3 



5 



7 



17 and 19 

 21 and 27 

 23 and 25 

 29 and 31 



Wheat and clover 



Wheat, clover and corn 



Wheat, clover and potatoes. . . 

 Wheat, continuously 



Beans, continuously, with rye 



Corn, continuoufly 



Orchard grass, continuously . . 

 Fallow, continuoufly 



Pounds. 

 7560 

 6430 

 7550 

 5260 



6800 

 5690 

 9150 

 7710 



It is unfortunate that more data in reference to this experiment has 

 not been preserved. Some difficulty was experienced in getting good 

 stands of clover, the small grain plots Avere several times seriously at- 

 tacked by spaiTOAvs and other circumstances tended to lessen the v^alue 

 of the experiment. The notes taken of the experiment were also very 

 limited and in many cases the yields were not determined or were 

 lost. It is therefore, not possible to state definitely in all cases the 

 yields during the ten -year rotation period and to make a comparison of 

 the different treatments on a jirofit and loss basis and to work out other 

 data which should be very valuable in an experiment of such long stand- 

 ing. 



However, in studying the preceding tables, it may be said that (not 

 considering the immediate profit or loss from the various treatments) 

 the data indicate that: 



(1) A wheat and clover rotation has a somewhat better effect upon 

 the fertility of the soil than Avlieat. clover and corn, or wheat, clover 

 and potatoes. The first mentioned rotation includes clover every seccmd 

 year or one-half the time and would be expected to have a better effect 

 upon the fertility of the land than the other rotation mentioned in 

 which there is clover every third year. However, the diff'erences are 

 not marked. Wheat, clover and i)otatoes have produced slightly better 

 results than wheat, clover and corn. 



(2) That the above mentioned rotations in which clover appears give 

 better results than when land is continuously cropped in wheat or (^orn, 

 the plofs Avhich had been planted in wheiit and clover having about 

 one-third greater producing power than those which hiad been seeded con- 

 tinuously to wheat or corn. 



(3) That beans grown each season with rye seeded in fall and turned 

 under in s]>riiig as a green manure croj) has a better effect on the 

 fertility of the soil than growing corn continuously in this test increas- 

 ing the product ion 21% above the corn plot. The bean plots also show 

 an increase of 2^^^/< above the continuous wheat ])lot but by fuming to 

 Table I, it will be seen fhaf Plot \'1I ujxm which this comi)arison was 

 made did not possess the original fei-tilify of the other plots. The 

 planting of beans continuously with rye as a green manure crop while 

 not as good as the clover rotations compares fairly well with them. 



(4) That continuous cropping in orchard grass tends to inci-ease 



