Weston announces simplified, budget-priced exposure meter
- Publisher
- Elsevier Science
- Year
- 1949
- Tongue
- English
- Weight
- 80 KB
- Volume
- 248
- Category
- Article
- ISSN
- 0016-0032
No coin nor oath required. For personal study only.
✦ Synopsis
Gieserof the U. S. Department of Agriculture. Gieser is the experienced chief pilot of the Division of Grasshopper Control in the Bureau of Entomology and Plant Quarantine.
He has been flying for 19 years, and for 7 years has been specializing in insect control by means of aircraft. In suggesting that farmers plan for suitable landingstrips in each neighborhood whereplaneservice is needed frequently, he points out that the substitution of pasture for cultivated crops on a few level acreswould be repaid by the lower rates for dusting or spraying for control of insects, plant diseases, or weeds.
When a pilotdrives an airplane at a speed of 100 miles an hour and treats a strip 100 feet wide, he is covering about 20 acres a minute. Gieser uses this simple fact as a base for calculating loads and discharge rates. If the speed is 70 miles an hour and the treated strip is 60 feet wide, then 0.7 times 0.6 equals 0.42, and this fraction of 20 acres, gives 8.4 acres a minute as the area covered. This serves as a basis for determining how many pounds of dust or how many gallons of spray must be discharged each minute to distribute the quantity of insecticide required per acre for the particular job.