Please use this identifier to cite or link to this item:
Type: Conference paper
Title: Predicting the off-site deposition of spray drift from horticultural spraying through porous barriers on soil and plant surfaces
Author: Mercer, G.
Roberts, A.
Citation: 22nd Mathematics-In-Industry Study Group (MISG), 24-28 January, 2005, pp.27-52
Publisher: Massey University
Publisher Place: New Zealand
Issue Date: 2005
Conference Name: Mathematics In Industry Study Group (22nd : 2005 : Auckland, New Zealand)
Statement of
Mercer, Geoff and Roberts, Tony
Abstract: Shelterbelts can be used to capture spray drift from crop spraying and reduce its spread to non crop areas. Critical factors in the efficiency of this capture are the ambient wind velocity, the structure of the shelterbelt and the spray drift droplet distribution. Here we present a model of the flow through and over a shelterbelt. It is found that the flow pattern is largely independent of the ambient wind strength. Settling and evaporation of the spray drift droplets are investigated and critical droplet diameters determined. It is found that droplets larger than 200 microns settle before reaching the shelterbelt and need not be included in the shelterbelt capture calculations. A model of the spray drift collection within the shelterbelt is analysed. Wind speeds between 1 and 5 m/s are considered which is the range that spray operations are usually performed over. Shelterbelts with optical porosities between 10% and 30% and constructed of fine particles such as pine needles are found to perform the best.
Published version:
Appears in Collections:Aurora harvest
Mathematical Sciences publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.