. |June 28.|July 28.|Aug. 11.| Sept. 7.|
+-----------+--------+--------+--------+--------+--------+--------+---------+
|Wheat | 129 | 1268 | 4,385 | 40,030 | 46,060 | 15,420 | 6235 |
|Barley | 129 | 1867 | 12,029 | 37,480 | 45,060 | 17,046 | 6414 |
|Beans | 88 | 1854 | 4,846 | 30,110 | 58,950 | 12,626 | 3657 |
|Pease | 101 | 1332 | 2,873 | 36,715 | 62,780 | 5,281 | ... |
|Clover | 400 | 1645 | 2,948 | 50,100 | ... | ... | ... |
+-----------+--------+--------+--------+--------+--------+--------+---------+
TABLE II.--_Showing the average daily Loss of Water (in Grains) by the
Plants, within several stated divisional Periods of their Growth._
+------------+--------+--------+--------+--------+--------+--------+--------+
| Description|9 Days. |31 Days.|27 Days.|34 Days.|30 Days.|14 Days.|27 Days.|
| +--------+--------+--------+--------+--------+--------+--------+
| of Plant. | From | From | From | From | From | From | From |
| |Mar. 19 |Mar. 28 |Apr. 28 |May 25 |June 28 |July 28 |Aug. 11 |
| | to | to | to | to | to | to | to |
| |Mar. 28.|Apr. 28.|May 25. |June 28.|July 28.|Aug. 11.|Sept. 7.|
+------------+--------+--------+--------+--------+--------+--------+--------+
| Wheat | 14.3 | 40.9 | 162.4 | 1177.4 | 1535.3 | 1101.4 | 230.9 |
| Barley | 14.3 | 60.2 | 445.5 | 1102.3 | 1502.0 | 1217.6 | 237.5 |
| Beans | 9.7 | 59.8 | 179.5 | 885.6 | 1965.0 | 901.8 | 135.4 |
| Peas | 11.2 | 42.9 | 106.4 | 1079.8 | 2092.7 | 377.2 | ... |
| Clover | 44.4 | 53.0 | 109.2 | 1473.5 | ... | ... | ... |
+------------+--------+--------+--------+--------+--------+--------+--------+
Similar experiments were made with the same plants in soils to which
certain manures had been added, and with results generally similar.
Calculating from these experiments, we are led to the apparently
anomalous conclusion that the quantity of water exhaled by the plants
growing on an acre of land greatly exceeds the annual fall of rain;
although it is obvious that of all the rain which falls, only a small
proportion can be absorbed by the plants growing on the soil, for a
large quantity is carried off by the rivers, and never reaches their
roots. It has been calculated, for instance, that the Thames carries off
in this way at least o
|