PLANT FEEDING. 



Element 



Carbon, 



Oxygen, 



Hydrogen, 



Nitrogen, 



Minerals (ash), 



Total, 



Per cent. 



45 



42 

 6.5 

 1.5 

 5 



100.0 



Where it came from 

 Aii- 

 Air and water 

 Air and water 

 Soil 

 Soil 



1. In a ton of dried mixed plants how many pounds 

 of carbon? How many pounds of each of the other 

 constituents ? 



CORN 



Nitrogen 



PKospHorus 



Potassium I 



Nitrogen 



WHEATS PKospKorus 



VPotasslum 



COMMON ELEMENTS IN Two LEADING CROPS. 



As shown in the table the amount of carbon is 45 per 

 cent (45%) of the total weight. To solve this problem 

 we must find 45% of 2,000 pounds. One per cent (1%) 

 of a number means one part in one hundred parts, which 

 is the same as saying one one-hundredth (.01) part of the 

 number. 45% is .45 of the number. To get 45% of a 

 number we therefore multiply by .45. 



