Etude économique des plantations de Grand'Mère 10 ans après fertilisation
| Autor: | J. M. Conway, H. S. D. Swan, J. D. Gagnon |
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| Rok vydání: | 1976 |
| Předmět: | |
| Zdroj: | The Forestry Chronicle. 52:26-29 |
| ISSN: | 1499-9315 0015-7546 |
| DOI: | 10.5558/tfc52026-1 |
| Popis: | The profitability of an aerial fertilization, in the Grand'Mère white spruce plantations, is considered in the light of results from a 10-year manual fertilization trial (1962-1972). In the fall of 1972, the additional wood volume associated with the best four treatments — K2, N2K2, N1K1, and K1 — exceeds that of non-treated plots by 27,8, 26,9, 14,7 and 12,6 cubic meters per hectare respectively (4,0, 3,8, 2,1 and 1,8 cunits per acre). It was then postulated that similar results could be obtained by means of aerial fertilization. Then, the economic assessment, based on current (1975) prices obtained from the most reliable sources of supply and services, was made by taking into account all costs that would be involved in producing by means of aerial fertilization the same extra wood volume realized by manual fertilization.The assessment shows that treatments with 224 kg/ha (200 lb/acre) and 112 kg ha (100 lb/acre) of potassium sulphate were the most profitable by producing fertilizer-grown wood at costs of $6.72 and $7.47 per cunit on the stump while the profitability level was established in 1962 by the Consolidated Co. at $10.000 per cunit. In 1973, this level was raised to $15.00 and in 1975 it reached $18.00 per cunit according to the company. There would appear to be a sufficient cost advantage to justify the application of potassium fertilizer. Fertilization where nitrogen is included should not be considered at Grand'Mère because of the high price of urea (45% N) — $220.00 per ton in January 1975. |
| Databáze: | OpenAIRE |
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