. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 254 Bulletin 254. Such marked effects are supported by the observations of King, Parkes and others. Parkes found in the peat bogs in Lancashire, England, that at a depth of 7 inches the drained soil was 15° warmer than the undrained soil and at a depth of 31 inches the drained soil was still ° warmer. John Johnston wrote in 1853: "Such fields (undrained) must generally be left late in the spring — perhaps too late
. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 254 Bulletin 254. Such marked effects are supported by the observations of King, Parkes and others. Parkes found in the peat bogs in Lancashire, England, that at a depth of 7 inches the drained soil was 15° warmer than the undrained soil and at a depth of 31 inches the drained soil was still ° warmer. John Johnston wrote in 1853: "Such fields (undrained) must generally be left late in the spring — perhaps too late to work favorable — and in the autumn the frost will inflict an ; On the Yoemans farm it has been observed many times that the oat crop may be planted in well drained land before adjoining land of the same kind is in condition to plow and in the spring it is commonly observed by farmers how the seed in the wet spots is delayed in appearance above the surface. These latter observations emphasize one other very important effect of drainage in this connection. It lengthens the growing season by per- mitting the land to be cultivated and seeded earlier in the spring and by keeping up the temperature in the fall sufficiently late to ward off early frost. In the southern part of the State on the high hills where it is diffi- cult to mature corn even in the favorable seasons it may be readily seen .. -J^g^' how important to the farmer is this extension of the growmg season. In many cases the difference is that between a successful crop and a failure. (6) Drav'.agc increases the m'aiJahJe food supply in the soil. This results from the effect of drainage on the moisture retaining capacity, the temperature, the aeration and the growth of soil bacteria. The ad- mission of air acts directly on the minerals as an oxi- dizing agent, thereby ren- dering some of them more -'.^ soluble. The increased /' temperature increases the solution processes and both the aeration and hig
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