Development and Testing of Air Jet Outlets for Hedgerow-type Apple Orchards to be attached to Speed Sprayers.
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概要
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This investigation was carried out to develop air jet outlets attached to speed sprayers for hedgerow type apple orchards, and to obtain a suitable way of application.The results are as follows:1) Two kinds of air jet outlets to be attached to a commercially manufactured spped sprayer were made on an experimental basis. They had 55 degree spray angle on each side, which was suitable for spraying trees about 3m high.2) The 85mm width outlet (type II) had 20% higher air velocity and 30% larger air horse power than the 120mm width outlet (type I). The former outlet produced better results in spray performance.3) Judging from the spray distribution, the suitable application rate in hedgerow orchards is from 40 to 50% of that in traditional orchards, thus conserving dilution water, agricultural chemicals and labour.4) The suitable application width is 8m for both 1 and 3-row planting. Uniform spray distribution and sufficient work efficiency can be obtained, by the customary operation speed.
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