Linked Life Data

11802600

Source:http://linkedlifedata.com/resource/pubmed/id/11802600

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2002-1-22
pubmed:abstractText
Twelve lysimeters with a surface area of 0.5 m2 and a length of 60 cm were taken over mole drains from a Denchworth heavy clay soil and divided into two groups with either a standard agricultural tilth or a finer topsoil tilth. The influence of topsoil tilth on leaching of the herbicide isoproturon and a bromide tracer was evaluated over a winter season. The effect of variations in soil moisture status in the immediate topsoil on leaching of isoproturon, chlorotoluron and linuron was investigated in the following winter season. Here, water inputs were controlled such that lysimeters received 50 mm at a maximum intensity of 2 mm h-1 over a 4-week period with herbicides applied on day 15. Three treatments received the water either all prior to application, all after application, or evenly spread over the 4-week period. Leaching losses of the three herbicides were monitored for a subsequently drainage event. Analysis of covariance showed a significant effect of topsoil tilth and total flow on both the maximum concentrations (P = 0.034) and total losses (P = 0.012) of isoproturon in drainflow. Both concentrations and losses were c 35% smaller from lysimeters with the finer tilth. However, generation of the fine tilth in the field was restricted by a wet autumn and this is not considered a reliable management option for reducing pesticide losses from heavy clay soils. In the second experiment, variation in soil moisture content prior to and after application did not have any significant effect (P < 0.05) upon subsequent losses of the three herbicides to drains.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Aluminum Silicates, http://linkedlifedata.com/resource/pubmed/chemical/Bromides, http://linkedlifedata.com/resource/pubmed/chemical/Herbicides, http://linkedlifedata.com/resource/pubmed/chemical/Linuron, http://linkedlifedata.com/resource/pubmed/chemical/Methylurea Compounds, http://linkedlifedata.com/resource/pubmed/chemical/Pesticide Residues, http://linkedlifedata.com/resource/pubmed/chemical/Phenylurea Compounds, http://linkedlifedata.com/resource/pubmed/chemical/Soil, http://linkedlifedata.com/resource/pubmed/chemical/Soil Pollutants, http://linkedlifedata.com/resource/pubmed/chemical/Water, http://linkedlifedata.com/resource/pubmed/chemical/Water Pollutants, Chemical, http://linkedlifedata.com/resource/pubmed/chemical/chlortoluron, http://linkedlifedata.com/resource/pubmed/chemical/clay, http://linkedlifedata.com/resource/pubmed/chemical/isoproturon
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1526-498X
pubmed:author
pubmed:issnType
Print
pubmed:volume
57
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1127-34
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Influence of topsoil tilth and soil moisture status on losses of pesticide to drains from a heavy clay soil.
pubmed:affiliation
Cranfield Centre for EcoChemistry, Cranfield University, Silsoe, Bedfordshire MK45 4DT, UK. c.brown@cranfield.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't