PLL 
os : 
MEDICAGO FALCATA, A YELLOW-FLOWERED ALFALFA. Al 
The above data are verified by those obtained at Highmore, where 
plants grown in hills 44 by 44 inches were cut and the recovery noted. 
A brief summary of the results is presented in Table II. 
TABLE III.—Rate of recovery of Medicago falcata after cutting, at Highmore, 
S. Dak., wm 1913. 
Average meas- | Average meas- | 
urement of Aver- urement of | se 
lants. _ _ age - | lants. ' Dat | , ase 
Sie Nasal se Pate hat-/yesht [Serer Neto ye Patehar-| height 
* }on July Mer Saas OT aly: 
Height.| Spread. | ae ‘Height. Spread. | 17. 
sie Bae | | 
Inches. | Inches. | Inches. | Inches. | Inches. Inches. 
MYT Se SSeS 124 352 | June 27 | 34. || 207252: se 12% 364 | June 27 4h 
Sc ea Gear 452 | June 23 E'S | Gy ea 173 431 | June 24 63 
DOWIE Sie 4 1g$ 392 | June 14 | Te 28070 k=2= | 233 | 413 | June 24 73 
DUPED sae. Se 19 302 | June 17 | Te P280GL sess 208 44 June 23 43 
| | | 
1 Observations were made on eight plants of each number. 
As will be noted, there is some difference in the rate of recovery 
of the various introductions, but this ordinarily is small and can 
scarcely be considered as a fixed characteristic of any of the forms. 
Observations made on plats where strains of Medicago falcata were 
grown in broadcast stands indicate that the growth after cutting is 
less than when grown in rows and hills. The specific data herein 
recorded are supported by general data published by the Dickinson 
(N. Dak.)-substation (64) and in reports of the Canadian Experi- 
mental Farms (4/7). 
LATE AUTUMN GROWTH. 
The difference in the comparative rate of growth of Medicago 
falcata and Medicago sativa in the autumn is influenced -to a great 
extent by temperature. In October, 1913, notes were taken at 
Brookings on the effect on the various alfalfas of a hard freeze that 
occurred September 22, when the temperature reached 17° F. In 
general, the plants of d/edicago falcata were little affected, and 
nearly all that were recorded then as being injured were later found 
to be hybrids of Afedicago falcata and Medicago sativa. The various 
strains of Medicago sativa were very noticeably injured, while the 
hybrids were also injured, but to a somewhat less degree. 
In a season of relatively high fall temperatures and favorable 
moisture conditions plants of Medicago sativa will produce more 
late fall growth than those of Iedicago falcata. This is quite in 
accordance with the previous discussion under “Spring growth.” 
HARDINESS. 
The characteristic of hardiness in plants is commonly defined as 
ability to endure cold. It has recently, however, come to have a 
broader meaning; namely, the ability to survive winter conditions. 
