THE PLANT AND THE WATER 21 



the inner surface of the bottle? Explain what you 

 observe. 



3. Place some cut flowers that have begun to 

 wither in a vessel containing cold water, immersing 

 all except the blossoms. Set in a cool place for several 

 hours. What change occurred ? Explain. 



Free Bulletins, U. S. Dept. of Agriculture. 

 Farmers' Bulletins. 



No. 46. Irrigation in Humid Climates 



No. 116. Irrigation in Fruit Growing. 



No. 138. Irrigation in Field and Garden. 



No. 158. How to Build Small Irrigation Ditches. 



Table II. 

 Table showing proportions of water in farm crops. 



One bushel of root crops contains about 55 pounds of water. 



One bushel of potatoes contains about 45 pounds of water. 



One bushel of corn (dry, shelled) contains about 5 pounds of 

 water. 



One bushel of wheat contains about 6 pounds of water. 



One bushel of oats contains about 3 pounds of water. 



One ton of dry hay contains about 300 pounds of water. 



One ton of green feed contains from 1,500 to 1,800 pounds of 

 water. 



NOTE: This represents only the water left in the plants and 

 seeds as a part of them. By far the greater amount used by the 

 plant passes off to the air through the pores in the leaves. 



Problems. 



I. If rain falls an inch deep on the level, how 

 many cubic inches is that per square foot? Per square 



