[Comparative trial of potash fertilizers in vineyard, Merlot variety] | Ensayo comparativo de fertilizantes potásicos en viña, variedad Merlot

abonos potasicos acidez acidity alcohol content application rates calidad color colour couleur crop yield dose d'application engrais potassique espagne fertigation grape must irrigation fertilisante mosto de uva nitrate de potassium nitrato de potasio potash fertilizers potassium nitrate potassium sulphate quality rendement des cultures rendimiento de cultivos spain sulfate de potassium sulfato de potasio teneur en alcool variedades varieties vitis vinifera