UBC Theses and Dissertations

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UBC Theses and Dissertations

The evaluation of a new fertilizer derived from fish waste McMullan, Margaret Jean


Water in three separate applications was allowed to percolate through columns of pots containing different types of soils to which fish proteinate had been added only in the top pot. The volume of water was sufficient to saturate all the soil and to give a small excess for analysis. Plants were subsequently grown in all pots and the increased growth in different pot levels was used as a measure of nitrogen retention. On the whole the fish proteinate was well retained, particularly in heavy soils, but the retained fertilizer was more efficiently utilized in light soil. The tendency of the fish proteinate in its present form to absorb moisture from the air and to cause the formation of a hard crust, especially in the light soil, are definite drawbacks, and it is concluded that these undesirable features must be overcome before the product should be put on the market.

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