rights-of-way, industrial sites, and on other noncultivated areas. Use the 

 higher rates of application if semipermanent soil sterilization is required 

 and the lower rates if contact kill or temporary soil sterilization is the 

 objective. The treatments suggested above w^ill render most soils unproduc- 

 tive for periods of 30 days to 4 years or more depending on the chemical 

 used, the soil type, and a number of soil properties and climatic factors. 



45 



