484 ReEporRT oF THE HORTICULTURAL DEPARTMENT OF THE 
TABLE XIII.— Som, TEMPERATURE IN TILLED AND SODDED LAND. 

Depth of 6 inches. Depth of 12 inches. 
N Weather 
Date. A. M. Paevis A. M. P. M. conditions. 
Sod. | Tilled.| Sod. | Tilled.| Sod. | Tilled.}| Sod. | Tilled. 
G/28e. eh sO Ts 63 724 63 634 634 654 | Bright. 
6/29....] 654 664 67 68 634 654 63 654 | Rainy. 
Tle 614 612 70 70 61 62 622 64 Very cloudy. 
MUS toes 66 66 654 65 634 644 634 634 | Very cloudy. 
W/ date 604 594 69 694 614 614 624 634 | Bright. 
hE ee 624 62 68 70 62 63 63 65 Bright. 
1/De dae 634 632 71+ 724 624 64 634 65% | Slightly cloudy. 
T/GCe oe 644 65 702 72 634 65 634 654 | Cloudy. 
i OcEdee 67 68 704 724 65 674 65 674 | Cloudy. 
(EAL. os che 664 674 73 75 644 67 654 68 Bright. 
AW Ae 67 724 744 644 674 654 68 Slightly cloudy. 
Lee 66 68 67 68 65 674 63 64 Rainy. 
Tp APS Mee 634 64 68 68 622 644 64 66 Bright. 
Vyloeet.« | Ole 62 704 70+ 622 634 64 65 Bright. 
Weel eos 67 734 75 644 664 654 674 | Slightly cloudy. 
GFAGa id. =| B69 70 75 ta! 66 68 674 692 | Slightly cloudy. 
Ui lee ar Oy 714+ 754 774 574 694 68+ 704 | Cloudy. 
YU Alice ees cl (ty TAUPE 714 734 75 674 69+ 674 692 | Slightly cloudy. 
17 LO) ee) oo 70+ 76 77% 674 70 684 al Bright. 
W203 lap OF (2 73 734 68 704 684 702 | Bright. 
CUP 5 3| hug iG) 76 71+ 724 67 694 664 684+ | Rainy. 
CERRY GO | Mas) 682 73+ 74 674 684+ 674 69 Cloudy. 
i / 2d OS 684 71 714 662 684 664 684+ | Bright. 
fees ah CWE. 68+ 73+ 734 664 68 674 684 | Bright. 
7/20..0-1 O74 684 734 734+ 664 68 674 69 Slightly cloudy. 
(f/2 Bel aD 694 704 70 67 69 66+ 684 | Slightly cloudy. 
1/2950.2 1 OT 672 73 734 654 674 664 684 | Slightly cloudy. 
- | | FFs SF S | | 
Aver..| 66.3 | 67.4 71 73.3 | 64.5 | 66.6 | 65.4 | 67.2 


Table XIII shows that the tilled soil is warmer morning and 
night at depths of six inches and twelve inches than 
is the sodded soil. At the first named depth the tilled soil is 
1.1° warmer at seven o’clock in the morning and 1.7° warmer 
at six at night. At a depth of twelve inches the tilled soil is 
2.3° warmer at the morning hour-and 1.8° in the evening. 
These results agree with the experimental results and con- 
clusions of the best soil authorities. For example, Hilgard 
says:* “A cover of either living or dead vegetation depresses 
the temperature of the soil as compared with the bare land, 
as elaborately shown by Wollny and Elbermeyer. In the 
monthly averages these differences rarely exceed .8° C. (1.5° 
“Soils. By E. W. Hilgard. New York: 1906, p. 305. 
