22 



Ga. The Evaluation of Chemical Compotmda as Nematocidea and 



Their Phvto toxic Ity to Agricultural Crops « To (1) test ch^cals 

 having prospective nematocidial value for their efficacy on 

 general and select nematode population; (2) develop special soil 

 fumigation methods for different nematode species as different 

 crops may require; and (3) test adaptability of nema toe ides and 

 soil fumigation methods in cooperation vrith crop specialists 

 on practical production basis. 



Nematol,, Agron., Path., Hort. 220 (S-19) 



ni. Fundamental Problems Associated with the Use of Pesticidal 

 Chemicals in Soils. To determine (1) rate at which insecticldal 

 chemicals accumulate in soils under normal usage; (2) plant and 

 animal tolerance for varying degrees of soil contamination; and 

 (3) rate of insecticide loss frcan soils of varied types and 

 under varied climatic conditions. 

 Ent. 12-311 (NC-19) 



m. The Adsorption. Movement^ and Effect of Herbicides in Plants 



and Soils. (l) Study factors affecting adsorption and translocation 

 of herbicides in higher plants; and (2) study residue, movement, 

 and nature of adsorption of herbicides in different soils. 

 Agron. 15-378 



La. The Effect of Chemicals Used in Agriculture on the Soil 



Microflora . To determine effects of herbicides, pesticides, de- 

 foliants, etc., upon the microorganisms present in the soils of 

 Louisiana. 



Plant Path., Bot. 837 (S-22) 



Maine Effect of Soil Residues of DDT and Toxaphene on Plant Growth. 

 To determine possible toxic effects to potatoes from continued 

 application to soil and to plants of DDT and toxaphene, especially 

 possible effects on flavor or other quality factors, acciamlation 

 amd persistence of residues in soil, and detection of residues 

 in soils. 



Eht., Chem., Agron. 82 Coop. ARS 



Mich. The Role and Fate of Herbicides. Antibiotics^ Growth Regu lftt-lpff 

 Substances and Other Compounds in Different Soil Types. To study 

 Tl) residual effects of herbicides, antibiotics and plant hormones 

 in different soils; (2) find effect of various ccanpounds on mi- 

 crobial flora of soils; (3) find species of bacteria >rtilch might 

 prove helpful in aiding disintegration of herbicides; and (U) 

 determine effect of biuret on plant growth, to determine the 

 cause of transformation of urea to biuret, and to determine biuret 

 content of various commercial sources of urea. 

 Hort., Soil Sci., Bact. 123 



