29 



Ariz. Protection of Citrus Trees and Fruit From Freezing 



Injury . Learn most efficient methods of operation and effec*- 

 tiveness of wind machines and orchard heaters in raising tem- 

 peratures during freezes. Investigate physiological conditions 

 of tree in relation to tolerance to cold. 

 Hort. 38U Coop. USDC-W 



Ark. A Study of the Factors Influencing Cold Injury to Peach 



Trees . To study environmental and physiological factors that 

 influence susceptibility to cold damage in peach trees, giving 

 special attention to factors that influence the initiation, 

 intensity, and duration of rest period, in attempt to find a 

 basis for development of techniques for modification or control 

 of rest. 



For., Hort. 209 



Ark. A Study of Factors Affecting Germination and Seedling 



Growth of Cotton at Low Temperatures . To study (1) effects of 

 temperature on basic germination processes and growth of cotton 

 (2) devise methods of increasing cold tolerance in seedling 

 cotton. 



Agron. U05 Coop. ARS 



Calif. The Effects of Fluorides on Growth. Quality, and Yields 

 of Tree", Field and Vegetable Crops . (1) Learn phytotoxic 

 effects of atmospheric fluorides on nutrition, growth, and, 

 when possible, yields of important crops. (2) Investigate 

 effects of the incorporation of soluble fluorides with various 

 types of soils on the growth and fluoride uptake by plants 

 grown thereon. (3) Learn effects of prolonged irrigation of 

 crops on acid, neutral and alkaline soil with water containing 

 soluble fluorides. 



Soils and PI. Nutr., Air Pollution 1633-B (W-3_?) 



Conn. Effects of Altering the Environment on the Quality of 



Plant Growth . Learn in vitro the systems that could cause the 

 response of plants to environment. Chemically control systems 

 and responses by: improving quality of produce from unfavorable 

 environments in greenhouse and field, and by demonstrating the 

 the importance of systems in vivo . 

 Soils and Climatol. 703 " 



Fla, Physiological Responses of Florida Forage Crops to Environ- 



mental VariablesT Learn interactions of temperature, light and 

 associated radiation, water, nutrients and management on be- 

 havior of selected forage crops. 

 Agron. 7U3 (S-12) 



Fla. The Interrelation of Environment to the Physiology and 



Chemistry of Plants. II. Organic Acid Metabolism of PlantsTin 

 Relation to Minor Element Nutrition . Learn the organic acid 

 content of certain species and inbred lines of plants grown 

 under normal and deficient levels of minor elements, and relate 

 variables to growth and quality. 

 Agron. 766 



