25 



Calif. Factors Influencing; , the Re-Kstabllahment of Peach 



Orchards on Old Peach Soils. To discover and devise methods 

 for preventing the peach replant growth depression. Study 

 development of the virgin orchard on the University replant 

 plot with particular reference to growth rate, behavior of 

 neiaatode populations, and behavior of microbiological popula- 

 tions. 



Pomol. 1126 



Calif. 



Del. 



Ga. 



Synthesis and Degradation of Organic Compounds by 

 Sarpophytic Bacteria. To study (1) nutrition of microorganisms— 

 including information on the role of specific nutrients, new 

 growth factors & biochemical mechanisms. In sjmthe^is of Im- 

 portant cellular constituents; (2) metabolism of nitrogenous 

 compounds concentrating on analysis of biocheadcal mechanisms 

 in decomposition of specific substrates by organisms now 

 available in pure culture; (3) fatty acid synthesis & degrada- 

 tion by bacterial enzymes — finding precisely how butyric acid 

 is formed frcm acetic acid & ethyl alcohol, & what enzymes, 

 co-enzymes & other factors participate in the process; (4) 

 methane formation; (5) transformation of carbohydrates & other 

 ncn -nitrogenous compounds; (6) COj utilization; & (?) N fixa- 

 tion. 



Plant Biochem. 1207 



The Role of Microbial Guma and Related Materials in the 

 Genesis and Stabilization of Soil Structure. To learn (1) 

 extent & manner in which genesis & stability of soil aggregates 

 are influenced by microbial gums & related substances; (2) 

 cultural conditions influencing production of these substances; 

 and (3) amount & characteristics of these substances as result- 

 ing from decomposition of plant residues. 



Agron., Agr. Engin. I3-A (NE-ll) 



The Microbiology of Crop Residues as Influenced by Nitrogen 

 Additions and Other Management Practices. (l) Relate certain 

 management practices to soil organic matter & resulting effect 

 of soil organic matter on nutrient availability, aggregation & 

 moisture availability; and (2) learn effect of nature and C:N 

 ratio of organic residues on persistence of materials in soils 

 and effect of materials on soil pi^perties. 



Agron. 3U (S-35) 



