32 



S-35 Effects of Soil Microorganisms on Soil Properties and 



Plant Growth. The development of an understanding of the 

 fundamental microbiological relationships in Southern 

 soils pertaining to (l) the factors influencing decom- 

 position of crop residues and the resultant effects upon 

 soil properties and crop production; and (2) fixation 

 and transformations of nitrogen. 



Cooperating stations: This section, Ala. II-A, 

 Miss. II-A, and Okla. II-A: This section, 

 Ga. II-D, N, C. II-D, and S. C. II-D. 



W-31 The Conservation and IJaproved Use of Nitrogen in 



Western Soils. (1) To evaluate the factors affecting 

 nitrogen transformations in soils including losses, 

 gains, immobilization, mineralization, and mineral 

 fixation and to devise practices for the control of 

 these transformations; and (2) to determine the effects 

 of different nitrogen fertilizers on soil properties. 

 Cooperating stations: This section, Ariz. II-A, 

 Calif. II-A, and Oreg. II-A: Section b: Colo. T-^B, 

 Hawaii I-B, New Mex. I-B, Utah I-B, Wash. I-B 

 and Wyo. I-B 



