S 6 — 



T 



-20 



DUNE WIDTH ( FEET) 



Figure 42. Mean cross-sectional profiles of unfertilized and fertilized (180-120-60) 

 bitter panicum plots (north half, 1,200-foot dune -width panicum, north 

 Padre). Initial planting in February 1972. Plots were surveyed May 1973 

 before fertilization and after December 1973 and March 1974. Each is 

 the mean of four profiles of two each in two 50- by 50-foot plots per 

 treatment. 



142 



