622 



Bui,]:.e;tin 84 



TABLE LXXIX. 



CORN ; CULTIVATION TEST, SULPHUR SPRING 

 VALLEY DRY FARM, 1915 



spring of 1915, at the rate of tw^elve loads per acre ; a crop of winter 

 vetch, yielding about five tons of green forage per acre, was plowed 

 under in June on two other plots ; and an additional two plots were 

 left without fertilizer. An Indian variety. White Hopi, and an 

 American variety, White Cap, were planted on July 21 under the 

 three conditions of soil treatment. A flood about three inches deep 

 preceded the planting five days, and a uniform stand and rapid 

 growth were noted in all plots. Table LXXX records the results, 

 which favor green manuring. 



TARLE LXXX. 



CORN ; FERTILIZER TEST, SULPHUR SPRING 

 VALLEY DRY-FARM, 1915 



To determine the most practicable depth of plowing, nine plots 

 of White Cap and three plots of Leaming corn were planted, from 

 July 31 to August 3, on land which had been plowed at depths 

 ranging from three to twelve inches, with the exception of two 

 plots which were disced only and dynamited only, respectively. 

 Preparation of the seed bed began immediately prior to planting. 

 Table LXXXI clearly indicates the advantage of deep plowing, 

 yields of stover being especially affected. In the dynamited plot 

 one-half stick of 40 per cent strength powder was used every fifty 



