-20- 



B» Culture and Physiology 



Ala. Identification and Evaluation of Some of the More Common 



Factors Limiting Cotton Yields in Alabama . Determine (1) ef- 

 fect of moisture on cotton yields, disease, insects, & morpho- 

 logical characters in cotton; (2) inter-relationship of N levels, 

 insects, & disease on production; (3) relationship between cul- 

 tural practices, soil physical properties, insect & disease con- 

 trol measures, & vegetative growth & yield of cotton plant; (4) 

 average maximum yield obtainable without supplemental irrigation 

 in various regions of state. 



Agron., Soils 113 Coop. ARS 



Ariz. Cotton Production Under Irrigation . To (l) improve cotton 



cultural practices, & (2) determine influence of environmental, 

 physiological & genetic factors on quality & industrial qualities 

 of cotton grown in southern Arizona. 



Agron., Agr. Chem. , Engin. 264 Coop. ARS 



Ark. Rotation and Fertilizer Experiments for Cotton Production 



on Heavy Delta Soils . To study various crop rotations and fer- 

 tilizer treatments for cotton production on heavy-textured soils 

 (Sharkey series) of Eastern Arkansas. 

 Agron. 365 



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 & growth of cotton 

 (2) devise methods of increasing cold tolerance in seedling 

 cotton. 



Agron. 405 Coop. ARS 



Ark. A Study of Factors Affecting the Fruiting Behavior of 



Cotton . To (1) investigate factors affecting fruiting habits 

 of cotton: initiation, intensity, fruiting pattern, cutout, 

 etc., (2) use obtained information to tailor growth of plant 

 that maximum yields may be secured from available soil & cli- 

 matic resources. 



Agron. 406 Coop. ARS 



Ark. Physiological Effects of Selected Herbicides on Cotton . 



Soybeans « and Noxious Weeds . Establish maximal limits of cer- 

 tain herbicides for cotton & soybeans, & minimal requirements 

 for control of noxious weeds, as may be influenced by age of 

 plant 8 & environmental conditions. Learn degree to which varie- 

 ties within a given species differ in their tolerance to any 

 given herbicide & learn cause of differences. Investigate mech- 

 anism by which herbicides kill plants. 



Agron. 408 (S-18) (Also see Part 24.) 



