. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 8 CITRUS FRUITS UNDER IRRlGAlIuN § 24 the asphaltmn and other heavy substances that will not burn readily are left in the pot in the foim of a residue, with the result that, after several burnings, the heaters hold less oil than at first. This deposition of residue is, to a certain extent, the fault of the heater, also, since some heaters will bum more of the asphaltmn than others. Both the grade of oil and the heater should be carefully considered when heating equipment is purchased. The fire in most types of heaters is extinguis
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 8 CITRUS FRUITS UNDER IRRlGAlIuN § 24 the asphaltmn and other heavy substances that will not burn readily are left in the pot in the foim of a residue, with the result that, after several burnings, the heaters hold less oil than at first. This deposition of residue is, to a certain extent, the fault of the heater, also, since some heaters will bum more of the asphaltmn than others. Both the grade of oil and the heater should be carefully considered when heating equipment is purchased. The fire in most types of heaters is extinguished by placing the covers on the pots, thus smothering the flame. Much trouble is experienced with some forms of heaters that are not tightly constructed. In these the supply of air cannot be entirely shut off, and as a result they may smolder for a time and then explode, scattering burning oil over the near-by trees and the men as well, if they happen to be near. 10. A grower should provide tanks in which to store the oil, in order that he may be ready to heat the grove at any time occasion demands. The capacity of the tanks should be sufficient to provide at least 1,000 gallons for each acre of grove. It is well to place the tank on a side hill so it may be filled and emptied by gravity. A tank wagon of 400 or 500 gallons capacity is generally used for distributing the oil through an orchard. These are for sale in the citrus-produc- ing regions. On account of the difficulty of getting a loaded - tank wagon through the orchard when the ground is soft, some growers pipe the oil to outlets distributed throughout the orchard. This entails extra expense, but gives much better satisfaction, especially on sticky or soft soils. 11. The number of heaters to use per acre will depend on the location of the grove, on the variety of trees, and on their age, size, and shape. In general, with full-grown bearing trees, not less than one heater to the tree, with a double extra row around the
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