Analysis of Drop Size Spectra from Agricultural Nozzles
Author | : Moatasim Mohamed Sid Ahmed |
Publisher | : |
Total Pages | : 350 |
Release | : 1987 |
Genre | : Drops |
ISBN | : |
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Author | : Moatasim Mohamed Sid Ahmed |
Publisher | : |
Total Pages | : 350 |
Release | : 1987 |
Genre | : Drops |
ISBN | : |
Author | : AJ. Adams |
Publisher | : |
Total Pages | : 14 |
Release | : 1990 |
Genre | : Agricultural sprays |
ISBN | : |
The differences in drop size characteristics along the long axis of "fine", "medium" and "coarse" sprays produced by agricultural fan nozzles were determined using the Aerometries Phase Doppler Particle Analyzer (PDPA). Water, water + 0.06% adjuvant, water + 0.4% emulsifiable concentrate (EC) and water +0.2% dispersible granule (DG) were sprayed through each nozzle. There was little difference in volume median diameter (Dv.5), number median diameter (Dn.5) or percent (by number and volume of the spray contained in drops 100um or 300um diameter when water was compared with the DG. However, the EC had a significantly larger Dv.5 than the water sprayed through five out of the six nozzles tested. Therefore, sprays produced by specific nozzles cannot be reliably defined on the basis of data for water alone. The percentage of spray volume contained in drops 100um diameter (most likely to drift) was 4 times greater in fine compared to coarse sprays. However, the 6-fold difference in flowrate results in the higher throughput nozzles producing most "driftable" volume per unit time. In coarse sprays, 69 -- 84% by volume, but only 13 - 29% by number, was contained in drops 300um diameter (may rebound upon impaction). When these drops were artificially removed from the analysis, the Dv.5 was in the range 190 - 231um, irrespective of nozzle or'formulation. Thus, while coarse sprays contain, characteristically, large drops (which may contribute to off-target contamination because they are not retained well by plant surfaces), they are not associated with a reduced drift potential compared to fine sprays, based on volume production of drops
Author | : Bohdan Maksymiuk |
Publisher | : |
Total Pages | : 16 |
Release | : 1964 |
Genre | : Aerial spraying and dusting in agriculture |
ISBN | : |
Author | : American Society of Agricultural Engineers |
Publisher | : |
Total Pages | : 1264 |
Release | : 1996 |
Genre | : Agricultural engineering |
ISBN | : |
Author | : Xiaolan Lv |
Publisher | : Frontiers Media SA |
Total Pages | : 236 |
Release | : 2024-06-03 |
Genre | : Science |
ISBN | : 2832549926 |
Plant chemical protection uses professional spraying machines to transport chemicals such as pesticides and herbicides to the target sites for pest, disease, and weed control in crop production. Such practices play a vital role in ensuring the supply of food, fruits, and vegetables for human beings. However, traditional plant chemical application methods suffer from excessive pesticide use, low utilization rate, and high labor intensity due to the backwardness of the existing sprayers, the single atomization technology, etc. In order to boost the progress of modern agriculture, plant chemical protection should be oriented toward efficient, accurate, and intelligent application technologies and equipment. Smart chemical application technology and efficient equipment can effectively reduce pesticide usage, mitigate the harm of chemicals to the environment, and lower labor intensity, realizing the sustainable development of disease and pest control of horticultural crops, ensuring food safety, and maintaining crop yield and quality.
Author | : Ivan W. Kirk |
Publisher | : U.S. Government Printing Office |
Total Pages | : 248 |
Release | : 2004 |
Genre | : Technology & Engineering |
ISBN | : |
"The objective of this handbook is to present aerial spray nozzle animation models in tabular format for use as a reference manual at the mix and load station, in the field, or at other locations where computer access is impractical or unavailable."--P. 8.
Author | : K. Haq |
Publisher | : |
Total Pages | : 16 |
Release | : 1983 |
Genre | : Bacillus thuringiensis |
ISBN | : |
Drop size, as indicated by the volume median diameter (VMD), and size uniformity, noted by the relative span (RS), were correlated with (1) viscosity, (2) surface tension, (3) viscoelasticity, and also (4) liquid throughput. Two types of nozzles were used, simple orifices or jets and hollow cones. The density of the mixtures did not vary greatly and no correlations were made with this function.
Author | : L. E. Bode |
Publisher | : ASTM International |
Total Pages | : 261 |
Release | : 1990 |
Genre | : Pesticides |
ISBN | : 0803113889 |
Annotation Twenty-one peer-reviewed papers from the Tenth Symposium on [title] held in Denver, Colo., October 1989. They're organized into three categories: perspectives on pesticide risks, formulation technology and characteristics of uptake, and application systems. Annotation copyrighted by Book News, Inc., Portland, OR.
Author | : E. Dan Hirleman |
Publisher | : ASTM International |
Total Pages | : 259 |
Release | : 1990 |
Genre | : Drops |
ISBN | : 0803114591 |