Effect of organic manure, nitrogen and potassium fertilization on growth, flowering and chemical constituens of marigold plants, Tagetes minulu L.

abonos nk abonos orgánicos agronomic characters calendula caléndula características agronómicas caractère agronomique chemical composition composición quimica composition chimique crecimiento croissance engrais nk engrais organique floración floraison flowering growth inflorescence inflorescences inflorescencias nitrogen potassium fertilizers organic fertilizers tagetes