. Elementary botany [microform]. Botany; Botanique. 2o6 I dies (fig. 242). It dies NUTRITION. âi '^' .A*'- âSunflower- plants. The two left-hand plants lave been cultivated in a soil containing combined nitrogen "1 the form of potassic nitrate. i he two right-hand plants have been cultivated in a soil similar^ excepting that there is no com- bined nitrogen in it. (After A. Mayer.) ;er for want of nitrogen, though it has an inexhaustible supply %f free nitrogen in the air around it andTn solution "^^'^ ^" ^^^ -^-e solution. This proves that the plant cannot obtain from t
. Elementary botany [microform]. Botany; Botanique. 2o6 I dies (fig. 242). It dies NUTRITION. âi '^' .A*'- âSunflower- plants. The two left-hand plants lave been cultivated in a soil containing combined nitrogen "1 the form of potassic nitrate. i he two right-hand plants have been cultivated in a soil similar^ excepting that there is no com- bined nitrogen in it. (After A. Mayer.) ;er for want of nitrogen, though it has an inexhaustible supply %f free nitrogen in the air around it andTn solution "^^'^ ^" ^^^ -^-e solution. This proves that the plant cannot obtain from the air the nitrogen n requires The plant must have com" bmod nitrogen-preferably nitiogen containing salts^supplied to its roots Hence the roots absorb all the elements required by the plant w th the exception of carbon.* The members of the Bean-family (£een/es or are caused by microscopic fungi or bacteria. Ihese Zegumi,iosce can live and grow vigorously when the nitrogen^ h supplied to them only in the forrn of free nitrogen gas. ButiftherooS ot a leguminous plant are not infected with the tubercle-bacerium, the r5ant remains stunted and soon dies when not supplied with nitrates or other wartrt ^^"^t^°ge"- In some Dlants tn 'V^ '?^^^" leguminous food ^""^ ^^ ^^^ "^^'°Sen as CURRENT OF WATER AND SALTS UP THE STEV TO THE LEAVES. ^^^ If we observe the amount of water ^hc:r^rK«^ u .u dipping in a culture-solution, we Tee that 'i?t ^ '^^ '°°*' as . sHo^XTt^.r, *: "^S^ S t no, Me r«S?'TcH °* "«'"'' '"''""-â "Pounds, though they «â-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Groom, Percy, 1865-1931; Penhallow, D. P. (David Pearce), 1854-1910. A manual of the more common herbaceous pla
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
