74 



under the latter 400 Ibs. of guano per acre. To the latter 

 there was also applied 625 bushels per acre of a compost made 

 from one part of yard manure and one of soil, spread broad- 

 cast and plowed in. The following table gives a portion of the 

 data determined May 2nd and 3rd. 



Water-soluble salts under and between rows of peas. 



In these cases the differences are not as strongly marked 

 throughout the four feet as they were. in the former series, but 

 there can be little doubt but that either the fertilizer has ad- 

 vanced downward directly beneath the rows or else there has 

 been lateral capillary sweeping of salts which has caused the 

 concentration under the rows. 



CAPILLARY MOVEMENT OF SALTS IN EIGHT SOIL TYPES. 



METHOD OF TREATMENT. 



In these studies a pair of the 2-foot cylinders represented in 

 Fig. 1, p. 64, were filled, at each station, with the soil of the 

 surface foot of each type, in a nearly air-dry condition. The 



