SO KNAPP METHOD OF GROWING COTTON 



a matter of record that in the early days of 

 commercial fertilizer the foulest smelling and 

 the most repulsive looking brand was considered 

 most effective. This idea no longer prevails 

 among intelligent farmers. The first thing 

 they look for is the tag showing available 

 elements in each package. But the mass of 

 farmers have not been sufficiently educated 

 along this line. They still buy on credit and 

 consequently take what the dealer offers, re- 

 gardless of price or grade. We hope this book 

 will be of value in aiding purchasers to buy and 

 use fertilizers with more intelligence and profit 

 in the future. 



The chief object in the use of any fertilizer is, 

 of course, increased yield, and to bring this 

 about it must supply available plant food, or 

 make available some of that already tied up 

 in the soil. Usually artificial fertilizers per- 

 form both of these offices. 



Most soils contain all the elements that enter 

 into the plant growth except three nitrogen, 

 phosphoric acid, and potash. There is enough 

 potash found in the soils in nearly all the South- 

 ern States. This is especially true on the red 

 clays if a proper rotation is followed. 



