Summary
Humic acid derivatives were added to an acid, an alkaline, and a liquid fertilizer. The mixtures were applied in bands at planting time. The addition of the humic acid derivatives to the fertilizers failed to produce a beneficial effect on yield, quality or nutrient uptake which could not be achieved by good fertilization alone.
Resumen
Los derivados de ácido húmico fueron añadidos a tres tipos de abono : uno ácido, uno alcalino, y uno líquido. Las mezclas se aplicaron en tiras al tiempo de la siembra. La adición de los derivados del ácido húmico a los abonos falló de producir un efecto beneficioso a la cosecha, a la calidad o a la absorpción de nutrientes que no se habia ya obtenido con un buen abono solo.
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Literature Cited
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Cooperative investigation among Washington State University, Washington State Potato Commission, and American Humates, Inc. Scientific Paper No. 3119.
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Kunkel, R., Holstad, N. Effects of adding humates to the fertilizer on the yield and quality of Russet Burbank potatoes. American Potato Journal 45, 449–457 (1968). https://doi.org/10.1007/BF02850419
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DOI: https://doi.org/10.1007/BF02850419