EXERCISE 26 (Continued) 

 Record of Temperature — Thermometer Readings 



(69) 



Location 

 of thermometer 



Temperatures 



11 A. M. 1 p. M. 



QUESTIONS 



1. Explain why one soil is heated more than the other. 



2. What effect does organic matter have on the color of soil? Why? 



3. On which soil do the plants ^appear quickest? 



4. Which kind of plants show first? 



5. Give in their proper order the general dates for planting winter wheat^ 



spring wheat, corn, mangels, cabbages, oats, potatoes, barley, alfalfa, 

 clover, beans and other field and garden seeds. State the temperature 

 at which each of these plants germinates the best. 



6. Name six conditions which influence soil temperature. 



7. What effect has (a) rolling, and {h) harrowing upon the temperature of 



the soil? 



8. Show by means of a diagram how the slope of the land may influence the 



temperature. 



