Bui. 279, U. S. Dept of Agriculture. 



Plate V. 



Fig. 



1.— Sixteen Plants in an Unthinned Row of Acala Cotton with 10 

 Vegetative Branches and 70 Bolls. 



Seven of the 10 vegetative branches were produced on the two end plants of the section, 

 adjacent to open spaces in the row. This illustrates the effectiveness of crowding to sup- 

 press the development of vegetative branches. But note the smaller plants, which produced 

 no bolls. This probably is due to the suppression or abortion of fruiting branches, brought 

 on by the overcrowded condition of the row during its fruiting period. Single-sta Ik culture 

 aims to avoid such a condition. Compare with Plate III, figure 1, and Plate IV, figure 1. 

 (The plants were 8 feet from the camera when photographed.) 



Fig. 2.— The First Picking of Seed Cotton from Rows in Section C. 



The plants in the rows from left to right were spaced early to 6, 9, 12, 18, and 24 inches, 

 respectively. The yields in pounds per row were 13.2, 11.8, 8.9, 8.6, and 7, respectively. 

 (The piles of cotton were 8 feet from the camera when photographed.) 



