Adjustment of a substractive technique for the diagnosis of possible nutrient deficiens in soils of the central region of Córdoba
Proceeding previous work for the adjustment of Chaminade's substractive method to soils of the central region of Córdoba, in 1972, a factorial experiment was conducted, three concentration levels of the solutions for initial complete fertilization (N, P, K, Ca, Mg, S and minor elements) and fiv...
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| Autores principales: | , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Facultad de Ciencias Agropecuarias
1981
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| Materias: | |
| Acceso en línea: | https://revistas.unc.edu.ar/index.php/agris/article/view/890 |
| Aporte de: |
| Sumario: | Proceeding previous work for the adjustment of Chaminade's substractive method to soils of the central region of Córdoba, in 1972, a factorial experiment was conducted, three concentration levels of the solutions for initial complete fertilization (N, P, K, Ca, Mg, S and minor elements) and five levels of weekly addition of N (NH₄NO₃ solution) were utilized. The experience was conducted with six samples corresponding to two soil profiles: one a zonal soil of the Manfredi Agr. Exp. Station (INTA) with a texture corresponding to a silt loam and the other an alluvial soil on terraces of the Río Tercero river, being a coarse sandy loam and representative of an area of peanut monoculture. Ryegrass (Lolium multiflorum L.) was utilized as test plant, valuating dry matter production by cuttings at two week intervals. Each treatment was carried on with two replications, rotating the pots in each of them every time water or nitrogen solution was added. The analysis of the accumulated dry matter production of successive cuttings permits to establish as optimum concentrations, or nearly so, the following: 0,5 times the concentration of the initial complete fertilization solutions and 0,25 times the concentration of the weekly supply of N as NH₄NO₃ solution, both values in relation to those indicated in the original method. |
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