120 FIELD AND LABORATORY STUDIES OF CROPS 



which is two to four weeks after the date of planting. This 

 first operation consists in throwing a small furrow away from 

 the row with a one-horse turning plow. The plants are 

 then chopped out with a hoe, leaving one plant every twelve 

 to fourteen inches. In the second cultivation the soil is 



United States. Rest of the World. 



Fig. 50. — Cotton Crop of the United States as Compared with the 

 World's Crop. 



thrown back to the plants by going twice around each row. 

 These two operations should follow each other in rapid 

 succession, in order to prevent an excessive loss of moisture. 

 For the remainder of the season the cultivation should be 

 no deeper than is necessary to eradicate-the weeds. 



