. Horticulture; a text book for high schools and normals, including plant propagation; plant breeding; gardening; orcharding; small fruit growing; forestry; beautifying home grounds; the soils and enemies involved. g. The trees are set eighteen to twenty-five feet apart each way inthe orchard, depending on the kind of stocks used for are cultivated, sprayed, pruned, and fertilized with muchskill and attention by commercial growers. Duncan, Hall, and Pernambuco are probably the best varietiesgrown in Florida, Duncan being the most popular. In Californiathe most popular variety is M
. Horticulture; a text book for high schools and normals, including plant propagation; plant breeding; gardening; orcharding; small fruit growing; forestry; beautifying home grounds; the soils and enemies involved. g. The trees are set eighteen to twenty-five feet apart each way inthe orchard, depending on the kind of stocks used for are cultivated, sprayed, pruned, and fertilized with muchskill and attention by commercial growers. Duncan, Hall, and Pernambuco are probably the best varietiesgrown in Florida, Duncan being the most popular. In Californiathe most popular variety is Marsh. 284 NUTS AND SUBTROPICAL FRUITS Lemons.—This crop is much less grown in Florida than beforethe heavy killing of trees by frost in 1895. The main crop of theUnited States is now grown in southern California near the period of low prices for lemons discouraged growers in boththese states. The fruit is picked a number of times each year. Prices arebest in summer and regions that can produce good summer fruithave a decided advantage. Growers try to delay ripening fromspring until summer. They also try to hasten the ripening of thefall fruit so as to get it on the summer market. Special processes. Fig. 199.—Tent over orange trees for fumigating with hydrocyanic acid gas to kill scaleinsects. This method is more common in California than elsewhere. () are sometimes resorted to in order that the fruit will assume a ripecolor. The culture and care of lemons is similar to that described fororanges. Much more attention must be given to the pruning oflemon trees. There is more trouble from brown rot disease on lemons, and thecost of producing the lemon crop is greater in many particularsthan the orange crop. The sorting and packing of lemons is done chiefly by hand. Theboxes are similar for the two fruits. Limes.—These acid fruits are produced commercially on theextreme southwestern coast of Florida and the adjacent islands. QUESTIONS 285 The product used at so
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