:: 
‘4 
35 
The percentages of lime, magnesia, phosphoric acid, potash, and iron, 
in the carbon-free ash are given and also the percentages of these 
constituents and nitrogen in the dry substance of the plant. 
Analyses of the ash of plants grown on sandy, loamy, and humus soils. 
ANALYSIS OF CARBON-FREE ASH. 
















oS & 2A q i) 
Ep ie oa oly 
Experiment from which CaCO3 ee So oO Ie) rah BO 
plants were taken. in soil. ofleaves. | 84 © not Se ate Y 
3 § act az ot 5 
A 4 = us Ay x} 
Per cent. Pet chs| Per cts\\ Per ct. || Perct. | Percts 
None. | Green....... 342 | 11.54 8. 68 5.21) 48.22 4.65 
Eisand yi soiljigin Wiis) ses 28 30 | Chlorotice....| 343 | 13.00 7.09 5.42 | 55.20 4, 22 
GD eae Gye 344 16. 42 8.14 4.86} 48.10 1. 86 
| None. | Green....... 345 8. 80 9. 60 4. 64 44. 28 2. 74 
WMG MoOamy SO) =< oseen eas — a2 = 30 | Chlorotic....| 346 | 13.38 7.99 4.74 | 38.62 2. 28 
110) Pea Gofe8 -.217°347 14. 36 6.95 4. 04 42. 61 2. 20 
None. | Green....... 337 9. 76 5. 60 6. 49 55. 94 3. 62 
III (soil rich in humus) .....--- SO WEEE CG A2e 941) (338 9. 80 4. 89 6.65 | 56.95 6. 87 
50 | Slightly 339 11.10 4.73 6. 28 29. 37 3. 02 
chlorotic. 
ASH CONSTITUENTS IN DRY SUBSTANCE OF PLANT. 
© os 3 eS 3 
E = oll eked Baa een eS A 
8 o= 3 om ie Geil ures, a Sp 
Experiment from which CaCO; | Appearance| So |} gdg| 0 |seOlag|so| ¢ om 
plants were taken. in soil. of leaves. om | 2B 2 my | Be | a a =< HA 
Fae id= ad laa | gw | of lal bee 
io OLAom obites 6 beh inter ee 
Per cent. PeSCE Chee aibe bral les tian Gls, | EeaGhs | Cl. 
One: | Green: ae. 342 | 6.19 | 0.71 | 0.54 | 0.32 | 2.99 | 0.29 | 0.67 
Un(sandy-soil): «22-2 5s. | 30 | Chlorotic....| 343 | 6.43 84 | .46 35 |3.55 | .27 noo) 
OU eres ae GOs eases) ease Solt  L.00 . 74 44 | 4.38 17 Absa) 
None. | Green....... 345 | 5.93 52 Ba 28 | 2.63 16 1d 
eG (loansy soil) sseete te. = 23. 30 | Chlorotic....| 346 | 6.08 | .81| .49 29 | 2.35 14 -58 
HS oe do. -| 347 | 7.45 | 1.07 . 52 30 | 3.18 16 . 60 
None. | Green....:.. 337 | 6.76 | .66| .38 44 | 3.78 PAI Bye 
III (soil rich in humus) ..... 50) a - 4. dor. es 338 | 6.68 | .65 | .33 44 | 3.83 | .46 67 
50 | Slightly 339 | 8.11] .90) .38 51 | 2.38 24 - 69 
chlorotic. 











It will be seen that the addition of calctum carbonate to the sandy 
and loamy soils, inducing chlorosis, had the effect of increasing the 
percentage of lime in the plant ash and of diminishing the percentages 
of iron. The percentage of magnesia as a rule diminishes, although 
not with the same regularity, while the phosphoric acid shows no 
regular increase or diminution. In the soil rich in humus the addi- 
tion of 30 per cent of calcium carbonate had no effect upon the plant 
ash, and it will be remembered that it also had no effect in inducing 
the chlorosis. The addition of 50 per cent of calcium carbonate to 
this soil, however, induced a slight chlorosis, and affected the plant 
ash, in the same way, although to a less degree as did smaller addi- 
tions of calcium carbonate to the sandy and loamy soils. 
In regard to the percentages of the various mineral constituents 
in the dried substance of the plant, it will be seen that wherever 
chlorosis was induced the addition of calcium carbonate to the soil 
[Bull. 11] 
