PA—Precision Agriculture: Variation of Spray Deposit and Loss with Air-jet Directions applied in Orchards
✍ Scribed by R. Holownicki; G. Doruchowski; A. Godyn; W. Swiechowski
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 371 KB
- Volume
- 77
- Category
- Article
- ISSN
- 0021-8634
No coin nor oath required. For personal study only.
✦ Synopsis
Axial fans with a radial air #ow have been most commonly used in fruit growing areas. These generate a large radial plume which is poorly targeted for modern intensive orchards. A high-volume directed air-jet system (HVDAS) sprayer, based on a standard axial fan has been developed to determine the in#uence of the air jet direction generated by the sprayer on the in-canopy spray deposit and o!-target loss in orchards of di!erent tree row volumes. Three sprayers with axial fans but with di!erent air discharge systems were compared (conventional, cross-#ow, HVDAS with the air spouts directed at 20 and at 403 upwards). The treatments were carried out in dwarf and semi-dwarf orchards. In modern orchards, the HVDAS sprayer with air spouts set 203 upwards produced a higher in-canopy deposit and a lower o!-target loss than the conventional and cross-#ow sprayers. Further raising of the air spouts directing the air-jets at 403 upwards, increased the spray loss and enhanced the risk of airborne drift without any in#uence on spray deposit.