U2 



Term. Relationship of Soil and Other Site Factors to Forest Com- 

 position and Productivity . Relate soil type and other site 

 factors, as aspect, topographic position and slope to: (1) 

 dominant species of the site; growth rate and competitive posi- 

 tion of principle tree species of the site. 

 For., Ames Plantation 107 Coop. TVA 



Texas Mineral Nutrition of the Cotton Plant . To (1) obtain basic 

 information on a. role of sodium in nutrition of cotton plant, 

 b. interactions between Na and major nutrient cations with 

 special emphasis on Ca and K, and c. growth and development of 

 cotton plant and changes in organic constituents as influenced 

 by nutrient treatments; (2) study absorption, distribution, and 

 accumulation of Mg by cotton and learn specific needs of cotton 

 for Mg regarding amount, season, and supply of other nutrients; 

 and (3) study influence of deficiencies and excesses of various 

 nutrients on plant vigor, yield, and disease resistance. 

 PI. Physiol., Path. 916 Coop. ARS 



Texas The Influence of Mineral Nutrition, Irrigation and Variety 

 on the Nutrient Uptake and Metabolism of Cool and "Warm Season 

 Vegetable Crops. Learn (1) effect of various levels of macro 

 and micro nutrients on metabolism of plants with emphasis on up- 

 take and utilization of S and mg. (2) interaction between irri- 

 gation and mineral nutrition on cool and warm season crops, (3) 

 differential variety response to macro and micro elements with 

 and without supplemental irrigation. 

 Agron., Hort. lOUli 



W. Va. The Interrelation of Soil Fertility, Planting Rate, and 



Geometry of Spacing in Relation to Yield of Various Hybrid Corn 

 Varieties . To (1) determine optimum population and spacing of 

 various corn varieties at different fertility rates: and (2) 

 correlate effect of rate of planting and plant spacing with 

 observed plant characteristics which include ear size, shelling 

 percentage, stalk barreness, lodging, and nutrient uptake. 

 Agron. 38 



Physiological Genetics 



Ala. Some Physiological Characteristics of the Progeny of 



Selected Southern Pines and Their Interrelation with Nursery 

 Practices, Survival, and Early Growth" To determine (1) certain 

 genetic characteristics in progeny of superior, average, and 

 inferior phenotypes through chemical studies of mineral uptake 

 and carbohydrate food reserves; and (2) relationships between 

 initial survival and early growth of out-planted seedlings and 

 inherited physiological characteristics as modified by environ- 

 ment in the seedbed. 

 For. 551 (S-23) 



