2k 



Texas Control of Perennial Broadleaf Weeds in Southern Crops . Learn 

 susceptible stages of growth and suitable environmental conditions 

 and methods of treatment for control of perennial broadleaf weeds, 

 particularly vines persisting in crops. 

 Agron. 915B (S-18) Coop. ARS 



Utah Control and Eradication of Weeds Through Management Practices 



and Herbicides " To determine (1) effects of various crops in com- 

 bination with different management practices and herbicides as 

 related to crop yields and control of creeping perennial weeds; 



(2) effect of herbicides in control of annual weeds in small grains 

 and certain other crops as related to crop yields and weed control ; 



(3) duration of time that winter rye and wild oats seed will remain 

 in soil and retain their viability and to devise methods for the 

 control of rye in winter wheat and wild oats in small grains and 

 other crops; (U) effects of various factors such as moisture, 

 commercial fertilizer, organic matter, soil texture, and salt on 

 susceptibility of weeds to various herbicides; (5>) if it is possible 

 to devise a technique to replace perennial weedy vegetation with a 

 more desirable type of vegetation on non tillable land by the aid 

 of herbicides, other devices, and reseeding with desirable species; 

 and (6) to continue present service, to college and station personnel, 

 of spraying for control of noxious weeds on college and station 

 property. 



Agron. 1^9 Coop. ARS 



Utah Control of Dodder in Alfalfa Seed Production . (1) Devise 



methods of controlling dodder as related to alfalfa seed, (2) study 

 nutrition and physiology of dodder and its host plant relations as 

 a basis for devising control methods. 

 Agron. U8l 



Wyo. Chemical Control of Perennial Farm and Range Weeds , (l) Devise 

 and evaluate methods for control of farm and range weeds. (2) Study 

 physiological response of plants to herbicidal applications. (3) 

 Learn effect of chemical treatment upon soil-plant relations. 

 Agron. 607 



TAX0N0MT, ECOLOGY AND LIFE HISTORY OF WEEDS 



Ar^.z. Investigation of Phenotypic Variations in Germination, Plant 



Establishment, and Early Seedling Growth in Relation to the Control 

 of Quercus turbinella , Greene , (l) Obtain information on genetic 

 variation in woody plants, using seeds and seedlings of same species 

 from different sources of origin. (2) Apply knowledge of environ- 

 mental factors influencing genetic-physiological germination, plant 

 establishment, and plant growth responses to shrub control. 

 Agron., Range Mgt. h$k (W-ll) Coop. ARS, F5 



