METHODS OF APPLYING MANURE. 55 



clovers on plots 8 was considerably greater than on plots X. Tlie dis- 

 tribution of clovers in the different plots was not entirely uniform, some 

 variations being apparently due to differences in moisture conditions. 

 No photographs were taken during these two years, and the fact stated 

 is demonstrated principally by the greater superiority of the rowen 

 crop (made up chiefly of clovers) on plots S than of the first crop on the 

 same plots. 



The plots were put into mowing again in 1918, the seed having been 

 sown, as is customary in this part of the State and with the type of soil 

 on which the experiments were located, in the standing corn about the 

 time it was waist high in 1917. We have harvested the hay crops now 

 for two years, and Figs. 1 and 2 were made from photographs taken on 

 Aug. 7, 1919, bj^ a station assistant, R. L. Coffin. The difference in the 

 proportion of clover, it will be seen at once, is very striking. The propor- 

 tions of grasses and clovers on different parts of the several plots were 

 not entirely uniform either on single plots N and S, under comparison, 

 or on different pairs, and the excess of clover was not as great every- 

 where as indicated by the illustrations. 



With a view to indicating in words as clearl}^ as possible the different 

 conditions, notes were taken on June 17, 1918, by a very careful station 

 assistant, Mr. R. L. Coffin. I quote from Mr. Coffin: — 



Plot 1. N, very little clover, mostly red. 



S, seven-eighths clover, red and alsike about evenlj' divided. 

 Plot 2. N, seven-eighths clover, mostly alsike, but more red than on plot 5. 



S, over seven-eighths clover, practically a dense mass of clover, more 

 red than alsiko;. 

 Plot .3. N, almost no clover, but a little both red and alsike present. 



S, nearly seven-eighths clover, more red than alsike. 

 Plot 4. N, about one-fourth clover, mostly alsike; a little sorrel. 



S, nearly seven-eighths clover, mostly alsike; a little sorrel. Growth on 

 plot 4 not as heavy as on plot 5. 

 Plot 5. N, seven-eighths clover, mostly alsike. 



S, a little more clover than on N. Except for two small areas, a dense 

 mass of clover, mostly alsike. 

 General condition on all plots: heads just beginning to show on timothy and red 

 top, the proportion of red top being apparently somewhat greater than 

 that of timothy. 



Why Clover has been more abundant on Plots S. 



The facts which have been for a long time known concerning the pro- 

 portions of the different leading plant-food constituents and their degree 

 of solubility in manures appear to the writer to have indicated in ad- 

 vance the more important wastes likely to occur from manure spread 

 during the winter and allowed to remain upon the surface. The more 

 important of these facts which seem to have a bearing upon the results 

 are as follows : — 



In fresh, well-made cow manure the proportion of its nitrogen content 

 soluble is about one-third of the whole; the proportion of its potash con- 



