-11- 



N. C. Soil Fertility in Relation to Soybean Growth and Produc- 



tion. To (1) determine relative importance & contributions of 

 native soil fertility, other properties of entire root zone, & 

 supplementary plant nutrients to growth & fruiting of soybeans; 

 & (2) study relationships between soil & environmental condi- 

 tions & crop in soybean growing areas of N. C. with special 

 reference to factors which are limiting yields. 

 Soils 118 



N. Dak. Soybean Improvement for North Dakota . (1) Develop lines 

 of soybeans suitable for North Dakota conditions. (2) Eval- 

 uate soybean cultural practices. 

 Agron. 6—15 



Ohio Factors Affecting Growth and Mineral Absorption by Plants — 



4-Factors Affecting the Absorption by Soybeans of Native Soil 

 Manganese and Applied Manganese . (1) Study effect of rate & 

 placement of N, P, & K fertilizers applied individually & in 

 combination on the availability to soybeans of native soil 

 Mn, & Mn incorporated with fertilizers. (2) Learn residual 

 effect of applied Mn in light & heavy textured soils. In- 

 vestigate (3) relation between variation in soil temperature 

 & soil moisture & apparent fluctuation in rate of absorption 

 of Mn by soybeans; (4) susceptibility of various varieties 

 to Mn deficiency. 

 Agron. 1-4 



Ohio Development and Evaluation of Improved Varieties of Soy- 



beans for Farm and Industrial Utilization . To (1) develop by 

 introduction, hybridization & selection improved strains of 

 soybeans adapted to Ohio: (2) cooperate thru U. S. Regional 

 Soybean Lab in interstate programs of exchange & evaluation 

 of basic breeding, stocks, segregating populations, & promis- 

 ing new strains originating from breeding programs of all cooper- 

 ating states; (3) make genetic studies as they may affect methods 

 of breeding & field plot technique; (4) assist in orderly, ef- 

 fective program of increase & early distribution of foundation 

 seed of new improved strains; & (5) evaluate breeding material 

 to existing varieties in regard to reaction to soybean diseases 

 prevalent in Ohio. 



Bot., PI. Path., Agron. 46 Coop. ARS 



