SOIL BEAT 



321 



temperature, influenced, of course, by the conditions 

 already discussed. The effect of this heat supply is re- 

 flected in the seasonal, monthly, and daily soil tempera- 

 tures at the surface and at varying depths below. The 

 following data illustrate the differences that may ordi- 

 narily be expected to take place from season to season on 

 an average soil : — 



Average Temperature Readings Taken at Breslau, Ger- 

 many.^ Average of Ten Years, 1901-1910 (in Degrees 

 Fahrenheit) 





Air 



1 Inch 



Deep 



8 

 Inches 



16 

 Inches 



28 

 Inches 



40 



Inches 



52 

 Inches 







Deep 



Deep 



Deep 



Deep 



Deep 



Winter . . . 



29.4 



28.2 



33.3 



34.9 



37.1 



38.7 



40.6 



Spring . . . 



45-5 



44.9 



45.3 



45.4 



44.5 



43.7 



43.5 



Summer . . . 



63.3 



62.8 



63.4 



63.4 



61.6 



59.3 



57.5 



Autumn . . . 



44.8 



43.7 



48.6 



50.5 



52.1 



52.6 



53.3 



Average Temperature Readings Taken at Lincoln, Ne- 

 braska.^ Average of Twelve Years, 1890-1902 (in 

 Degrees Fahrenheit) 





AlB 



1 Inch 

 Deep 



3 



Inches 



6 

 Inches 



12 

 Inches 



24 

 Inches 



36 



Inches 







Deep 



Deep 



Deep 



Deep 



Deep 



Winter . . . 



25.9 



28.8 



28.8 



29.5 



32.2 



36.3 



39.1 



S^pring . . . 



49,9 



54.8 



53.6 



51.6 



48.5 



45.7 



44.3 



Summer . . . 



73.8 



83.0 



80.9 



79.1 



73.8 



69,0 



66.2 



Autumn . . . 



53.9 



56.4 



57.6 



57.1 



57.5 



59.3 



60.3 



^Sehulze, B., and Burmester, H. Beoboehtungen tiber 

 Temperaturverhaltnisse der Bodenoberflaehe und versehiedener 

 Bodentiefen. Internat. Mitt, fiir Bodenkunde, Band II, Heft 

 2-3, Seite 133-148. 1912. 



2 Swezey, G. D. Soil Temperatures at Lincoln, Nebraska. 

 Nebraska Agr. Exp. Sta., 16tii Ann. Rept.» ^i^. 95-102, 1903* 

 T 



