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SCIENTIFIC MANUAL. 



37 



a few inches, with sterile soil below, the lateral roots will 

 enlarge, and extend themselves into the manure, while 

 there will be no fleshy root below ; hence, to produce 

 long, well developed roots, the manure should be placed 

 at considerable distance below the surface. 



A cotton plant which germinates during a drouth, when 

 the surface soil is dry, will have no lateral roots above the 

 point at which it reaches moist soil ; one that germinates 

 when the surface soil is saturated with moisture will have 

 lateral roots within half an inch of the surface. Again, 

 in times of drouth, the roots will be found penetrating 

 deeply in search of moisture. 



The roots of our cultivated plants may be divided into 

 two general classes, namely : tap-roots, and crown or lateral 

 wots. 



A1V plants whose seeds readily divide into two parts in 



