. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 14 CITRUS FRUITS UNDER IRRIGATION § 25 which, being largely sulphuric acid, bums holes in the tents. In addition, if an open generator is used, the gas has a tendency to rise straight in the air. Frequently, if the genera- tor is directly below the foUage of the tree, many of the leaves are burned and ultimately drop. This burning of the leaves is known as chimney burning and the result of this bummg, which is a heavy dropping of the leaves, is known as the chim- ney effect. Covers on the generator will eliminate chimney burning b
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 14 CITRUS FRUITS UNDER IRRIGATION § 25 which, being largely sulphuric acid, bums holes in the tents. In addition, if an open generator is used, the gas has a tendency to rise straight in the air. Frequently, if the genera- tor is directly below the foUage of the tree, many of the leaves are burned and ultimately drop. This burning of the leaves is known as chimney burning and the result of this bummg, which is a heavy dropping of the leaves, is known as the chim- ney effect. Covers on the generator will eliminate chimney burning by causing the gas to be more diffused with surround- ing air as it comes from the generator. The cover pictured in the illustration was devised by R. S. Woglum, of the United States Department of Agriculture. The cover is copper and is stamped to a concave form with corrugations which allow the escape of the gas, but not so rapidly as when no cover is used. DOSAGE '21. The dosage, or quantity of chemicals to use will vary with the size of the tree and the insect or insects to be combated. To calculate the dosage for a tree the cubic space enclosed by the tent must be known. Not all trees after they are covered with a tent assume exactly the same shape, but for all practical purposes they may be assumed to take the shape of a cylinder surmounted by a hemisphere, and these are the geometric figures used in computing dosages. To asccrtam the cubic contents accurately, it is necessary to know several^ measurements, but experience has shown that if the longest distance over the tree from the ground on one side to the ground on the opposite side and the distance around the bottom are used as factors and the cubic contents computed on this basis, the dosage can be determined with sufficient accuracy. 22. When fumigating, it is necessary that the measure- ments be ascertained quickly and with a fair degree of accuracy. For determining the distance over the tree, use is made of the sca
Size: 1570px × 1592px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
