A digest of facts relating to the treatment and utilization of sewage / by W.H. Corfield.

  • Corfield, W. H. (William Henry), 1843-1903.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: A digest of facts relating to the treatment and utilization of sewage / by W.H. Corfield. Source: Wellcome Collection.

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    More ni- trogenous matter in se waged grass. Early and late crops. Poor soil as fertile as good one. Increased amounts of produce not propor- tional to increased amount of sewage. sewaged grass, and a given weight makes less hay, but the dry substance of the sewaged grass generally contains a higher portion of nitrogenous compounds than that of the non-sewaged grass. In the Third Report of the Commission (I860) the following results are recorded :—That by the application of sewage through the winter a very early crop of grass may be obtained; a fact, the value of which cannot be over-estimated; that— The period during which an abundance of green food was available, was extended considerably at the end as well as at the beginning of the season, and the more so the larger quantity of sewage applied, almost up to the highest amouut employed, viz., 9,000 tons per acre ; that a poor soil gave fully as much produce per acre, under the influence of liberal dressings of eewage, as the uaturally much more fertile soil ; that from the average of three years, and from the two fields on which the experiments were conducted, the amount of produce obtained, withont sewage, was about 9£ tous of green grass per acre per annum, equal to about 3 tons of hay ; and with 3,000, 6,000, and 9,000 tons of sewage per acre per annum the amounts were respectively about 30£, and 321 tons of green grass, equal respectively (reckoned according to the percentage of dry sub- stance in each) about 5, 5f, and 6| tons of hay. Bat the largest quantities obtained were as much as 35 tons of green grass in one field and 37 tons in the other, equal to 6 tons 12fcwt. and 7 tons lewt. respectively of hay. These crops were produced with 9,000 tons of sewage per acre per annum. The increase in the crops was not proportional to the increased amount of sewage, for the increase per 1,000 tons was, when 3,000 tons were applied, about 5'tons of green grass; when G,000 tons were applied, 4 tons 2£cwt.; and when 9,000 tons were applied, 3 tons 3iowt. The results obtained with Italian