1986•Canadian Journal of Plant ScienceRequires access

EFFECT OF PLANT DENSITY AND SOIL FERTILITY ON THE PERFORMANCE OF NONOIL SUNFLOWER

G. H. Gubbels, W. Dedio

Abstract

The nonoil sunflower (Helianthus annuus L.) cultivar Sundak was grown at four plant densities and two soil fertility levels for 3 yr in the Morden, Manitoba area. Fertilizer increased achene yield in 2 of the 3 yr and increased achene size in 1 of the 3 yr. Achene size and weight decreased with increase in plant density. Achene yield reached a maximum at approximately 30 000 plants ha−1.Key words: Nonoil sunflower, Helianthus annuus L., plant density, soil fertility

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Key concepts: Achene, Helianthus annuus, Sunflower, Agronomy, Cultivar, Biology, Yield (engineering), Soil fertility