290 SOILS: PROPERTIES AND MANAGEMENT 



also to govern the time when his sowing and planting are 

 performed in such a way that the soil will be fitted, at 

 least as far as heat is concerned, for proper seed germina- 

 tion and plant growth. 



207. Relation of heat to germination and growth. - 

 In order to show the exact relationship of heat to ger- 

 mination of seeds and to the growth of plants, the follow- 

 ing data from Haberlandt 1 are given. While these 

 tables are not exact, they show clearly the necessity of 

 careful control of temperature in the propagation of 

 plants : 



THE RELATION OF TEMPERATURE TO THE GERMINATION OF 

 CERTAIN SEEDS (IN DEGREES FAHRENHEIT) 



THE RELATION OF TEMPERATURE TO THE GROWTH OF CERTAIN 

 PLANTS (IN DEGREES FAHRENHEIT) 



1 Haberlandt, F. Die Oberen und Unteren Temperatur- 

 grenze fiir die Keimung der Wichtigeren Landwirthschaftlichen 

 Samereien. Landw. Versuchs. Stat., Band 17, Seite 104-116. 

 1874. 



