8 BULLETIlSr 441^ U. S. DEPAETMENT OF AGEICULTUEE. 



For the 1914 crops, lime (CaCOg) was added to all the plats at the 

 rate of 2,000 pounds per acre, except the timothy and bean plats, 

 which received an application of 500 pounds per acre. To the timothy 

 plats lime was added on the surface to the sod; on the other plats the 

 lime was applied to the surface and well harrowed, so as to thoroughly 

 mix the lime with the soil to a considerable depth. The reaction of 

 the soil was tested four veeks after the lime was applied and period- 

 ically during the growmg season. The soil in all the plats showed 

 no acidity during the entire season. 



The manganese sulphate was applied and the crops were grown in 

 1914 as before. The yields for the year are given in Table VI. 



Table VI. — Effect of viangane.se sulphate on the yields of wheat, rye, timothy, beans, 

 corn, cowpeas, and potatoes in 1914. 



Area and treatment. 



Wheat. 



Rye. 



Timo- 

 thy. 



Beans. 



Corn. 



Cow- 

 peas. 







Pods. 



Vines. 



Stover. 



Ears. 





Per square rod: 



Untreated 



Treated with 



■ MnS04 



Per acre (calculated): 



Untreated 



Treated with 

 MnS04 



Us. 

 23 



28 



3,680 



4,480 



Lhs. 

 37 



57 



5,920 



9,120 



Lbs. 

 38 



43 



6,080 



6,880 



Lhs. 

 17 



20 



2,720 



3,200 



Lbs. 

 20 



24 



3,200 



3,840 



Lhs. 

 28 



31 



4,480 

 4,960 



Lhs. 

 14 



16 



Bush. 



32 

 36 



Lhs. 

 23 



27 



3,680 



4,320 



Lhs. 

 23 



.21 



Bush. 



61 

 56 



Table VI shows that the manganese-treated plat with each crop 

 except potatoes produced a larger yield than its check. The largest 

 increase was with the rye crop. The grain was thrashed in this case, 

 the check plat yielding 4 pounds of grain and the manganese plat 

 7^ pounds. The straw was increased 3,200 pounds per acre." The 

 rye growing on the check and manganese plats is shown in figures 

 1 and 2 and the harvested straw and. grain in figure 3. In the case 

 of the other crops wheat was increased 800 pounds, timothy 800 

 pounds, bean vines 640 pounds, bean pods 480 pounds, corn stover 

 480 pounds, corn grain 4 bushels, and cowpea hay 640 pounds per 

 acre. With potatoes, there was no increase; in fact, a decrease of 5 

 bushels per acre is shown. 



For the 1915 crop all the plats were again limed at the rate of 

 2,000 pounds per acre, the lime being applied in the fall of 1914. 

 The manganese was apphed as usual. Acidity tests of the soil were 

 made periodically, and again the soil was found not to become acid 

 during the growing season of 1915. The yields for 1915 are given 

 in Table VII. 



