. Citrus fruits; an account of the citrus fruit industry, with special reference to California requirements and practices and similar conditions . riationsin the moisture content of the soil, produces a greaterfluctuation in the growth of the interior than in the skinof the orange. Such a theory is quite reasonable, but sucha cause should be regarded as contributory only, inasmuch as only a part of thefruit on any given treewill split. If a numberof navel-split oranges arecut in longitudinal sec-tions, it will be found,almost without excep-tion, that the thicknessof the rind varies, beingquite


. Citrus fruits; an account of the citrus fruit industry, with special reference to California requirements and practices and similar conditions . riationsin the moisture content of the soil, produces a greaterfluctuation in the growth of the interior than in the skinof the orange. Such a theory is quite reasonable, but sucha cause should be regarded as contributory only, inasmuch as only a part of thefruit on any given treewill split. If a numberof navel-split oranges arecut in longitudinal sec-tions, it will be found,almost without excep-tion, that the thicknessof the rind varies, beingquite thick and oftencreased at the stem end,and as thin as paper nearthe navel. Specimenswith uniform thicknessof skin very rarely , dry spells of weatheralternating with damp cloudy weather, together with carelessirrigation, cause a high percentage of spHts among this classof oranges. While much may be done toward overcomingthis loss by careful irrigation and cultivation, the mostimportant remedy is probably the propagation of treesfrom carefully selected bud-wood. By this means wemay largely eliminate from our future orchards the un-. FiG. 126. — Horizontal cracks are verydifferent from splits. Blemishes of the Fruit and their Prerention .329 desirable types which are so prone to split during un-favorable weather. Puffing. — When oranges are left too long on the trees,they will often become puffy. The rind becomes weak,with many cross creases and much unevenness. Finallythe whole orangebecomes soft andstructureless. Thewalls of the juicevesicles become muchthickened and thejuice partly disap-pears, leaving thefruit dry, crumbly,and insipid. Theremedy for thistrouble is to pick thefruit earlier in thoselocalities where putt-ing is serious. Petec a.—Thistrouble appears inthe form of deepsunken pits in therind of lemons after they have been in the curing housefor some time. The tissue at these spots is found tobe dried and shrunken prematurely, somewhat after thefashi


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcitrusfruits, bookyea