LIMING OF SOILS FROM A PHYSIOLOGICAL STANDPOINT. 3l 
ae) . = ar tia 
Percentage of lime and magnesia to 1,000 parts dry matter in sugar beets, etc.—Continued. 
IV. ROOT CROPS. 
Minimumof mapmesia: .-<... 2. ---' 1.43 , Topinambur (2). 
| 
Maximum of magnesia.-........-.-.--- 8.26 Common beet (19). 
None tn, OF ime Sam esen 8 fo 1.00 | Potato (49). 
Maroney of linie! eas see 8.49  Turnips (13). | 
NoTe.—The numbers in parentheses indicate the aLnbas of paiivaes that served for calculation 
of the average. A few plants of subordinate interest were excluded from comparison. 
It is seen from these data that among the leaves of the plants of 
the three groups here considered (comprising in Wolff’s Tables seventy 
species from various families), the sugar beet leaves contain the high- 
est amount of magnesia, and, further, that among the leaves of root 
crops the common beet contains the maximum of magnesia in the 
roots and the minimum of lime in the leaves. From Wolff’s Tables, 
I (page 170), it can further be learned that of all the leaves there con- 
sidered those of the common beet and the sugar beet show, in relation 
to the amount of lime present, the largest amount of magnesia. 
Average lime and magnesia content to 1,000 parts dry matter in sugar and common 
beet leaves. 
Parts of Parts of 
| Plant. lime. magnesia. 
SESUP ayete AU SS ee ee 25. 76 26. 34 
eb OS Oo) a a Re ae 2 16. 84 14. 44 
une rma eee ee He te ede 30. 06 16. 86 
WaRRNOMMDCE ICH VES eee fo oe) shen We oe oe Se aie ee eo bee nee 16. 34 14. 62 
1 Wolff's Tables, I, p. 170. 2 Wolff’s Tables, II, p. 145. 
It may be of some interest also to compare the ratio between lime 
and magnesia in leaves of various other plants. The following ratios 
were calculated from the average data given in Wolff's Tables: 
Comparison of ratio of lime and magnesia in various plants. 
[ Totatash i Ratio ot || 
Plant, etc. Sree Jime to anne 
| matter..|), 2 ost | 
| | Per cent. | 
OES TT Sane a ee ee ee | 69.6 | 1.0.68 
| Clover, flowering bonciceh cag ois eS eee 68.6 1:0.31 
| Alialia ower? .-- 22-425... = ar A ee en eRe 73.8 LAO eI2 
fe SiaUIVITI Ee oe RS ee ek ee cede Ad 1 dine Rie EAL Se ee ee eee 41.0 1:0 37 
po LREBErie ONC See eid BA 68 he a a ee a Ps SE 85.8 | 1.0.50 
re i ee oe ce ind ee 116.4 | 10.12 | 
(Oil he Ne Se eee ea le ee ee eer, oe? 55.8 | 1.0.10 
| EES SDs eS de Ree Pee yee! 180.3 : 1 0.44 | 
| eo Ue 8 a ee ae ee 23.6 | 1.0.95 | 
SUED See ek ee AE Sets Se eee ee pe ele a 148.8 | 1.0.56 | 
| SSNS: pel SLE se ee ee ea ee 175.8 | 11.02 | 
(OPESECUTERO CIN OSE als Oba! a Te ee ea nee aera mee Aaa epee ee 153. 4 15/0590 | 
1 Wolff’s Tables, I. 2 Wolff’s Tables, II. 
