porebueh
Tổng số bài gửi : 5 Join date : 11/07/2011
 | Tiêu đề: But, on the one hand, it is possible Mon Jul 11, 2011 3:32 pm | |
| But, on the one hand, it is possibleBut, on the one hand, it is possible that in hot weather these matters may be useful in checking extreme perspiration, and in diminishing for the time the powers of the plant to absorb too much food from the air, or to part with water and oxygen too rapidly. On the other hand, the effect of ruin must be to wash away a portion of those deposits, and so to favour the perspiration and consequent growth of the plant. Moreover, as the more heat a plant is exposed to, the more it perspires, and the faster it grows, the greater will the tendency be to till up its pores; so it follows that when plants are exposed to great heat in a close house, and are not washed MBT or syringed, they are placed in an unnatural condition, where the care of the gardener defeats, to some extent, the object which he has in view. FORCE OP SUCTION BY LEAVES. Since a plant does not perspire at night, and since its absorbing points, the roots, remain during that period in con¬tact with the same humid medium as during the day, they will attract fluid into the system of the plant during the night, and, consequently, the weight of the individual will be increased, as Hales found to be the case. In like manner, if plants in the shade are MBT Shoes abundantly supplied with moisture at the roots, they also will gain more than they can lose; and, as this will be a constant action, the result must necessarily be to render all their parts soft and watery. It is evident, from what has been stated, that leaves must derive the food they digest from the earth through the medium of the roots, and from the air; and that they, while alive, maintain a kind of perpetual sucking action upon the stem, which is communicated to the MBT Shoes UK spongelets. MBT Shoes UK | |
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shop89
Tổng số bài gửi : 10 Join date : 16/07/2011
 | Tiêu đề: Re: But, on the one hand, it is possible Sat Jul 16, 2011 4:33 pm | |
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