N. Y. The Influence of Soil Factors on the Activity of Herbicides , 

 (Cornell) To determine (1) effects of soil moisture, organic matter, tex- 

 ture and related factors on the fate and activity of important 

 herbicides such as the phenoxy compounds, carbamates, ureas, 

 dinitros, etc.; and (2) develop working recommendations for these 

 herbicides over widest possible range of environment. 

 Veg. Crops 167 (NE-12) 



N. C. The Effect of Herbicides upon the Germination and Growth of 

 Certain Crops as Influenced by Environment Species and the Physi- 

 ological Condition of the Plant , To study (1) effect of certain 

 pre-emergence herbicides upon germination of cotton, peanuts, soy- 

 beans, and forage crops as influenced by relationships between 

 rainfall, soil physical properties, temperature, and rate and time 

 of application of herbicides; (2) effect of certain post-emergence 

 herbicides upon some of more important forage legumes as influenced 

 by relationships between species, age, stage of growth, and physi- 

 ological conditions of plants. 



Farm Crops 173(S-l8) Coop. ARS 



N. Dak. Some Factors Affecting the Control of Annual Weeds . To de- 



termine physiological and environmental factors affecting germina- 

 tion, dormancy and viability of annual weed seeds and devise im- 

 proved chemical or cultural control methods. 

 Agron., Bot. 9-3 (NC-10) Coop. FES 



Okla. Basic Mechanism of Herbicidal Action . To (1) determine rates 

 of absorption and distribution within plant of chemical compounds 

 that may be effective herbicides; (2) determine relative movement 

 of herbicides into root system of woody plants; (3) determine the 

 tissues involved in translocation; (U) determine factors affecting 

 translocation; (5) study changes in chemical composition of plant 

 cells after herbicide treatment, especially cell wall changes; and 

 (6) learn effects of herbicides on growth hormone systems of plant 

 in effort to learn if herbicides are acting on the natural auxins 

 responsible for plant growth. 



Agron., Bot., Chem., PI. Path. 888 Coop. ARS 



Or eg. Herbicide Residues: The Evaluation and Development of 



Analytical Procedures and the Study of Basic Relationships of 

 Herbicide Residues . (1) Evaluate" analytical procedures and adapt 

 them to determination of herbicide residues on crop plants. (2) 

 Develop methods of analyses for herbicide residues where such 

 procedures are not available. (3) Collect basic information for 

 evaluating herbicide residue problems as degradation, mechanism of 

 detoxification and deposition. 



Agr.Chem. 28U (See W-U5 in Part 7> Section d) Coop. USDA 



Oreg. Use of Isotopes in Studying Fundamental Agricultural and 

 Biological Problems. I. The Mode of Action oi 2,U-Dichloro- 

 phenoxyacetic Acid . To study the process by which 2,U-D exerts 

 its selective herbicidal effect on some noxious plants. 

 Agr. Chem. lhl-I Coop. AEC 



