36 FOOD FOR PLANTS 



cotton plant at various stages of growth, including 

 the plant at full maturity. The weight of the various 

 fertilizing constituents contained in the whole plant 

 grown on one acre, and producing a crop equivalent 

 to 300 pounds dry lint cotton per acre, was also care- 

 fully ascertained by analyses and calculation, the 

 figures being presented in the following table. 



The weight of Nitrogen, phosphoric acid, potash, 

 and lime contained in a crop producing 300 pounds 

 of lint is given, and the relative distribution of these 

 constituents through different parts of the plant is 

 also presented. The weights of the different parts 

 of the plant in a thoroughly dried condition are also 

 given, and it will be noted that the total dry weight 

 of the crop required to yield 300 pounds of lint is, 

 2,470.8 pounds. 



Amounts of Fertilizer Constituents in Pounds Required to 

 Produce a Crop of 300 Pounds of Lint. 



Lint 300.0 lbs. . 



Seed 507.1 lbs.. 



Burrs 363.1 lbs. . 



Leaves 566.2 lbs 12.64 



Roots 130.2 lbs. . 



Stems 604.2 lbs. . 



Total 2,470.8 lbs 38.61 13.42 31.16 41.07 



It appears from this table that to produce 300 

 pounds of dry lint there are required 38.61 pounds 

 of Nitrogen, 13.42 pounds of phosphoric acid, 31.16 

 pounds of potash and 41.07 pounds of lime. 



The need of the cotton plant for liberal amounts 



