. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. INSECTS'AND DISEASES 35 stimulation would always prove advantageous to plants. There appears to be a tendency for electri- cally stimulated plants to develop a more spind- ling growth than those grown under ordinary conditions. Conclusions concerning the effect of current electricity on plants. In conclusion, it may be stated that the application of electrical stimulation to cr
. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. INSECTS'AND DISEASES 35 stimulation would always prove advantageous to plants. There appears to be a tendency for electri- cally stimulated plants to develop a more spind- ling growth than those grown under ordinary conditions. Conclusions concerning the effect of current electricity on plants. In conclusion, it may be stated that the application of electrical stimulation to crops is not as yet practicable, al- though undoubtedly in the future electricity will be more exten- sively employed in agriculture, and it is hoped that agricultur- ists will be able to make use of the enormous amount of electri- cal energy constantly stored in the atmosphere. From the work that has been done, the follow- ing very general conclusions may be drawn: (1) Electricity exerts an ap- preciable influence on plants. (2) Ell e c t r i c a 1 stimulation gives rise to an accelerated ger- mination and growth of plants, the foliage in some instances (radishes) being stimulated more than the roots. (3) The strength of current inducing acceleration is confined to a narrow range. (4) There is a minimum, opti- mum and maximum stimulus. The minimum cur- rent is equal to about .005 milliamperes, the opti- mum to about .22, and the maximum is determined entirely by Fig. 52. To show the characteristic grooves 0 n the trunk of an elm tree caused by a feeble stroke of lightning. (Com- ) Literature. Some of the literature pertaining to the influence of current electricity on plants is as follows : L. H. Bailey, Electricity and Plant Growth, Transactions, Massachusetts Horticultural Society, Part 1, pp. 54- 79, 1894; Bertholon, De I'electricite des vegetaux, Paris, 1783; De Candolle, Physiologie vegetale, Tome 3, p. 1088; R. Chodat, Quelques effets de I'elec
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