The Theory and Practice of Horticulture: Or, An Attempt to Explain the Chief Operations of Gardening Upon Physiological GraoundsLongman, Brown, Green, and Longmans, 1855 - 606 من الصفحات |
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الصفحة 45
... the alburnum , protecting it from the air , and enabling it to form without interruption . The central wood is of little consequence , and may be destroyed , as it constantly is 46 COURSE OF SAP NOT PREVENTED BY WOUNDS . in.
... the alburnum , protecting it from the air , and enabling it to form without interruption . The central wood is of little consequence , and may be destroyed , as it constantly is 46 COURSE OF SAP NOT PREVENTED BY WOUNDS . in.
الصفحة 46
... PREVENTED BY WOUNDS . in hollow trees ; and the outer rind is of comparatively small importance , for it is continually perishing under the influence of the atmosphere : but liber and alburnum are the seats of vitality in trees and ...
... PREVENTED BY WOUNDS . in hollow trees ; and the outer rind is of comparatively small importance , for it is continually perishing under the influence of the atmosphere : but liber and alburnum are the seats of vitality in trees and ...
الصفحة 53
... prevent its recurrence so long as they remain in an active state . The excessive loss of sap in the above - mentioned cases would not have taken place if the roots had been wounded in the summer or autumn . It is probable , moreover ...
... prevent its recurrence so long as they remain in an active state . The excessive loss of sap in the above - mentioned cases would not have taken place if the roots had been wounded in the summer or autumn . It is probable , moreover ...
الصفحة 59
... prevented . Plants perspire by their leaves ; and dirt prevents their perspiration . Plants feed by their leaves , and dirt prevents their feeding . So that breathing , perspiration , and food , are fatally interrupted by the ...
... prevented . Plants perspire by their leaves ; and dirt prevents their perspiration . Plants feed by their leaves , and dirt prevents their feeding . So that breathing , perspiration , and food , are fatally interrupted by the ...
الصفحة 64
... prevent loss of heat by radiation , may produce some unappreciated injury by cutting off the rays of the moon , which Nature intended to fall upon plants as much as the rays of the sun . Even artificial light is not wholly powerless ...
... prevent loss of heat by radiation , may produce some unappreciated injury by cutting off the rays of the moon , which Nature intended to fall upon plants as much as the rays of the sun . Even artificial light is not wholly powerless ...
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absorb action alburnum appears atmosphere autumn bark bear become blossom-buds branches buds bulb calyx carbonic acid carpels cause cellular Chiswick chloroform circumstances cold colour consequence crop cultivated damp degree dryness earth effect employed epidermis evaporation experiments exposed fact favourable feet flowers fluid formation formed fruit gardener germination grafting ground grow growth healthy herbaceous horizontal Hort Horticultural Horticultural Society hygrometer inches increased injury leaf leaf-buds leaves ligature light loam matter mean temperature mode moisture mucilage nature night observed operation organs Peach Pear peat perish perspiration Pine-apple pistil plants pollen portion pots practice produced propagation proportion pruning quantity removed Rhododendrons ripening roots scion season seeds sepals shortened soil species spring stamens stem substance sufficient summer surface temperature thermometer timber tissue trees vapour varieties vegetation vigour Vine vitality Wardian warm winter wood wound