Registration Dossier

Administrative data

Endpoint:
biodegradation in soil
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: acceptable, well-documented publication meeting basic scientific principles

Data source

Reference
Reference Type:
publication
Title:
Alkylated ureas: mineralization and evaluation as N sources.
Author:
Praveen-Kumar and Brumme
Year:
1995
Bibliographic source:
Fertil Research 41: 117 - 124

Materials and methods

Principles of method if other than guideline:
Test soil mixed with 1,3-dimethylurea was incubated for 11 weeks. During the incubation period CO2 and N2O evolution was measured.
GLP compliance:
not specified
Test type:
laboratory

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): 1,3-dimethylurea

Study design

Year:
1995
Soil properties
% Org. C:
1.1
pH:
7.4
Experimental conditions
Soil No.:
#1
Temp.:
20 °C
Humidity:
20 g water/100g soil dry weight

Results and discussion

Transformation products:
yes

Any other information on results incl. tables

1,3 dimethylurea mineralized after a delay period of approx. 1 week in unsterilized soil, and subsequently the N was nitrified. 1,3-Dimethylurea mineralized as rapidly as urea after the delay period was over. The mineralization coincided with rapid evolution of CO2 and N2O and an increase in soil pH, and the formation of urea as an intermediate was hypothesized by the authors of this study. The mineralization was completed after 5 weeks in terms of carbon dioxide evolution and nitrate concentration. 1,3-Dimethylurea did not mineralize in sterilized soil.

 

Applicant's summary and conclusion