MANGANESE UNDER ACID AND NEUTEAL SOIL CONDITIONS. 
experiment was conducted as in previous years. Manganese sulphate 
was applied each year in amounts of 50 pounds per acre and the same 
crops were grown on the same plats as before except on the clover 
plats, which were planted in string beans. The timothy plats were 
again plowed and reseeded. 
In September, 1912, the plats were limed, using 500 pounds per 
acre CaC0 3 in excess of the amounts required by the soil as determined 
by the Veitch method, given in Table II. The manganese sulphate 
was applied to the wheat, rye, and timothy plats on September 15, 
and the plats and their checks were seeded. The corn, cowpea, bean, 
and potato plats received their applications in the spring of 1913, 
shortly before seeding time. 
The results for 1913 are given in Table IV. 
Table IV. — Effect of manganese sulphate on the yields of wheat, rye, timothy, beans, 
corn, cowpeas, and potatoes in 1913. 
Area and treatment. 
Wheat. 
Rye. 
Tim- 
othy. 
"Beans. 
Corn. 
Cow- 
peas. 
Pods. 
Vines. 
Stover. 
Ears. 
Per square rod: 
Lbs. 
13 
11 
2,080 
1,760 
Lbs. 
15 
14 
2,400 
2,240 
Lbs. 
36 
38 
5,760 
6,080 
Lbs'. 
15 
17 
2,400 
2,720 
Lbs. 
18 
18 
2,800 
2,800 
Lbs. 
24 
21 
3,840 
3,360 
Lbs. 
13 
11 
Bush. 
30 
25 
Lbs. 
32 
29 
5,120 
4,640 
Lbs. 
24 
21 
Bush. 
Treated with MnS0 4 .. 
Per acre (calculated): 
64 
Treated with MnSd. . 
56 
The results show that the manganese sulphate has again depressed 
the yield, but only slightly as compared with previous years. The 
only cases where the manganese plats produced larger yields were 
with timothy and beans, but the differences are very small. 
The soil was again examined for acidity early in August and the 
wheat, rye, corn, cowpea, and potato plats were again found to be 
acid ; the timothy and string-bean plats, however, were neutral. This 
was true of both the check plat and the manganese-treated plat. 
The lime requirement of the different plats, expressed in pounds of 
CaC0 3 per acre, is given in Table V. 
Table V. — Lime (CaC0 3 ) requirement per acre of the different plats to a depth of 6 inches. 
Plats. 
Wheat. 
Rye. 
Timothy. 
Beans. 
Corn. 
Cowpeas. 
Potatoes. 
Pounds. 
1,400 
1,200 
Pounds. 
1,000 
1.200 
Neutral . 
...do.... 
Neutral. 
...do.... 
Pounds. 
1,200 
700 
Pounds. 
900 
900 
Pounds. 
1,200 
900 
Treated with MnS04 
The amounts of lime added in the fall of 1912 were not sufficient to 
keep this soil neutral during the next growing season except in the 
two cases mentioned, and it is noted that these are the two plats on 
which the manganese produced the increase over its check. 
