1914] KELLEY—FUNCTION OF MANGANESE Zot 
TABLE I—Continued 
Plants analyzed oo ‘camn hor ee Po Total ash 
Waltheria americana stems: 
Manganiferous soil............. .56 14.97 11.70 3-67 3.58 
0 | SB eee 45 13.70. | 15.56 3.46 373 
Broom-corn leaves: 
Manganiferous soil............. 2.24. | 12.08 6.75 Be hier 
ee te .60 5-44 3.52 st al Merge ge 
Broom-corn stalks: 
Manganiferous soil............. 1.36 4.43 3.12 $02 Voce. 
I 52 1.88 2.51 3-72 |--e eee 
Tobacco stems: 
Manganiferous soil............. ao 9.47 4.08 2.08 7.02 
Dee T. 1.68 | 3.27.) 7-38 | 8.50 
Pigeon-pea leaves: 
Manganiferous soil............. ¥.43 16.11 32.25 4.04 | 12.17 
ee 7.86 7.66 | 10.85 84 
Pigeon-pea stems 
Manganiferous soil............. .99 | 15.29 2.82 4.25 5.81 
ree co 3.79 4.390 | 0.34.) 6.2 
Oat straw: 
Manganiferous soil............. .86 9.15 5.16 -73 | 10.27 
ES See ae Ee 3.40 5.10 8.81 11.73 
Wheat straw: 
Manganiferous soil............. 22 4.51 4.03 2.96 8.91 
ES ee ees i 2.09 ie 5.56 16.27 
Mango leaves: 
Manganiferous soil............. 2.10} 44.49 2°15 2.89 9.24 
ee a ew ae 4.90 5-43 8.21 
practically every instance the ak sorption of manganese was increased 
on the manganese soil. The analyses further show that there is a 
Pronounced difference in the percentages of lime, magnesia, and 
Phosphoric acid in the ash of plants from the two classes of soils. 
Some of the plants were not visibly affected; others little so; 
while still others showed a pronounced toxic effect; but uniformly 
Aroughout there was a tendency toward an increased absorption of 
€ on the one hand, and a decreased absorption of magnesia and 
Phosphoric acid on the other. 
Under certain conditions the ratio of lime to magnesia seems 
to be of considerable importance to plants. In order to bring out 
more clearly the relations between these two constituents of the 
ash, the relative amounts of lime and magnesia absorbed from 
normal and manganiferous soils, respectively, have been recal- 
culated from the previous ash analyses and are presented in table II. 
An inspection of the data in table II shows that in almost every 
