[en] Spray retention, i.e. the overall capture of spray droplets by plants on initial or subsequent
impact, and after loss due to run-off, is an important stage in the spray application process
as droplet losses may result in reduced efficacy, economic loss, and environmental
contamination. The aim of this exploratory study is to determine whether a new method
based on calculating the volumetric proportions per impact type, i.e. adhesion, rebound
and shatter, can be used to predict spray retention. These volumetric proportions are
calculated based on logistic regression models, derived from vision-based droplet characteristics
and impact assessments, and laser-based spray characteristics. The advantages
and limitations of such a method are explored. The volumetric proportions per impact type
on a horizontal, synthetic hydrophobic surface were determined for four different nozzles
(XR 110 01 VS flat-fan nozzle, XR 110 04 VS flat-fan nozzle, XR 110 08 VS flat-fan nozzle and
AI 110 08 VS air-induction nozzle) under controlled realistic conditions, and compared to
the results of a retention test. The volumetric proportions of adhesion were much lower
than the relative retentions, indicating that a considerable amount of rebound and shatter
also contributed to final retention. The method should thus be improved by including the
droplets retained after first impact and the retained proportions of partial droplet fragmentation
but it is nevertheless considered a promising technique.
Research center :
ILVO
Disciplines :
Agriculture & agronomy
Author, co-author :
Zwertvaegher, Ingrid; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Verhaeghe, Micheline; Katholieke Universiteit Leuven - KUL > Department Biosystems
Brusselman, Eva; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Verboven, Pieter; Katholieke Universiteit Leuven - KUL > Department Biosystems
Lebeau, Frédéric ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Agriculture de précision
Massinon, Mathieu ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Agriculture de précision
Nicolaï, Bart; Katholieke Universiteit Leuven - KUL > Department Biosystems
Nuyttens, David; Instituut voor Landbouw- en Visserijonderzoek = Institute for Agricultural and Fisheries Research > Technology and Food Science Unit
Language :
English
Title :
The impact and retention of spray droplets on a horizontal hydrophobic surface
Publication date :
October 2014
Journal title :
Biosystems Engineering
ISSN :
1537-5110
eISSN :
1537-5129
Publisher :
Academic Press
Volume :
126
Pages :
82-91
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Agency for Innovation by Science and Technology (IWT project 080528) of the Flemish government
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