1889.] 



PUBLIC DOCUMENT— No. 4. 



511 



The experiment will be continued, with some modifica- 

 tions, for another year. As the condition of the soil in field 

 "A" (see next page) becomes from year to year better 

 known, its fitness for investigations of a similar character 

 increases as time advances. 



The photographic illustrations accompanying this chapter 

 represent some of the most striking features noticeable in 

 the growth of these plats. They illustrate in particular the 

 striking influence of potash on the annual yield, and show the 

 disadvantages of black fallow on the productiveness of farm 

 lands. 



The annual yield of crops of dry corn fodder is stated 

 with reference to the same moisture, 48 per cent. 



The crops raised during the years 1886, 1887 and 1888, 

 on plats 1, 2, 6, 7 and 9, have served for our illustrations. 



