. Bulletin of the Department of Agriculture. Agriculture; Agriculture. WET LANDS OF SOUTTLKPJN LOUISIANA. 25 on this district could he made o(' the same length. On the hack lands, however, the ditches already are about as long us would be advisable, since the land is almost level. At present these ditches are too shallow to give adequate drainage. Some measure- ments of the depth of water table were made early in the summer of 1910. The results are shown graphically in figure 4. It is apparent that at that time this soil was not very impervious. Even after heavy rains the profile of the g
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. WET LANDS OF SOUTTLKPJN LOUISIANA. 25 on this district could he made o(' the same length. On the hack lands, however, the ditches already are about as long us would be advisable, since the land is almost level. At present these ditches are too shallow to give adequate drainage. Some measure- ments of the depth of water table were made early in the summer of 1910. The results are shown graphically in figure 4. It is apparent that at that time this soil was not very impervious. Even after heavy rains the profile of the ground water was not steep. The ditches are too far apart for the best results, although if they were the full 3 feet deep they would drain the ground much better. Now that the reservoir canal is of a good depth these ditches could be cut as deep as 4 feet and still be pumped dry. If instead of cutting new ditches between the present ones lines of tile were placed midway, the purpose would be served even better and consider- able land would be saved. The present ditches evidently are sufficient to take away the surface water, and, because of the open nature of the subsoil, the ground water would be taken away readily. The cost of maintenance alone on these extra ditches would nearly pay the interest on the cost of the tile work above that of the new ditches; in addition, there would be the saving in land. Furthermore, if tile were laid properly they would give the same amount of drainage all the time, whereas ditches give their best results only for the first few weeks after they are cleared of grass and weeds. Pumping Plant. The location of this plant is quite favor- able, as it is on the lowest ground in the tract and at the junction of three large canals, making the distance the water must travel to reach the plant about as short as is practicable. Steam for the three following pumping units is furnished by two water-tube boilers and one return tubular boiler, crude oil for f
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