386 EK. P. DeatTrRick 
one-half months. The crop was harvested on July 3, 1917. The yields 
obtained are recorded in tables 8 and 9: 
TABLE 8. Wuerat Grown FoR SEVEN AND OnE-HatF Montus on Dunxrrk Srttt Loam 
TREATED WITH MANGANESE SULFATE 
Weight of straw Weight of grain 
Parts per million of manganese added 
Average Relative Average Relative 
(grams) (grams) 
(Bais Feomeees ie ah Arent Na ae nial UO ga wtih 5.6 100 2.0 100 
IL ese toes, eye SNC eat Uae eran oe eR 5.0 89 4.0 200 
PADS Sad tba ree CO AAPA RRR Boe 102 4.1 205 
UD ee oe aa eg a RP oes fe a ek Da ee 3.5 62 2.3 115 
TABLE 9. Wuerat Grown For SEVEN AND One-Hautr Montus on DuNkKIRK Sitt Loam 
TREATED WITH MANGANESE SULFATE AND 20,000 Parts peR Mituron or Caucrum Car- 
BONATE 
Weight of straw Weight of grain 
Parts per million of manganese added i a 
verage : verage : 
(een) Relative (rams) Relative 
Oe ne ORe ee aOR AiG cei Eth au UPAR neta Set Se 100 sz 100 
TI sige Mir a Seca ate pecker ae ti see eet ARR A attain 4.5 265 2.0 118 
DEE Pat SARS lel oes EE Wie ee ee 4.9 288 1.8 106 
E510 Jeet SNE Winnie a Snr np eae en eye ants cd ary ait 5.0 294 Deal 123 
The effect of the manganese in these cultures is not apparent when 
the yields are considered. Practically all the yields of the soil treated 
with manganese are somewhat higher than those treated with calcium. 
The yield for the calcium carbonate check is strikingly low, for which no 
reason can be assigned by the writer. Greater differences, however, than 
those that appear in the data of table 9, were noted at an earlier stage 
of growth. It was observed that a majority of the manganese plants 
headed before the calcium-manganese plants did. In this respect it 
would seem that the calcium had interfered with the action of the 
manganese. 
