Full TGIF Record # 77457
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DOI:10.1002/ps.410
Web URL(s):http://onlinelibrary.wiley.com/doi/10.1002/ps.410/full
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Publication Type:
i
Refereed
Author(s):Brown, Colin D.; Fryer, Chris J.; Walker, Allan
Author Affiliation:Brown and Fryer: Cranfield Centre for EcoChemistry, Cranfield University, Silsoe, Bedfordshire, UK; and Walker: Horticulture Research International, Wellesbourne, Warwick, UK
Title:Influence of topsoil tilth and soil moisture status on losses of pesticide to drains from a heavy clay soil
Section:Papers
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Source:Pest Management Science. Vol. 57, No. 12, December 2001, p. 1127-1134.
Publishing Information:London : for the Society of Chemical Industry by John Wiley & Sons
# of Pages:8
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1002/ps.410/abstract
    Last checked: 03/14/2014
    Notes: Abstract only
Keywords:TIC Keywords: Topsoil; Soil moisture; Pesticide fate; Clay soils; Drainage; Isoproturon; Linuron; Leaching; Preferential flow; Soil structure; Bromide; Lysimeters; Leachates
Abstract/Contents:"Twelve lysimeters with a surface area of 0.5m2 and a length of 60cm 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 50mm at a maximum intensity of 2mm 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 subsequent 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."
Language:English
References:22
Note:Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brown, C. D., C. J. Fryer, and A. Walker. 2001. Influence of topsoil tilth and soil moisture status on losses of pesticide to drains from a heavy clay soil. Pest Manage. Sci. 57(12):p. 1127-1134.
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DOI: 10.1002/ps.410
Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1002/ps.410/full
    Last checked: 03/14/2014
    Access conditions: Item is within a limited-access website
http://onlinelibrary.wiley.com/doi/10.1002/ps.410/pdf
    Last checked: 03/14/2014
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
http://onlinelibrary.wiley.com/enhanced/doi/10.1002/ps.410
    Last checked: 03/14/2014
    Access conditions: Item is within a limited-access website
    Notes: Enhanced HTML version
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MSU catalog number: SB 951 .A1 P45
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