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Effect of Row Direction on Sunflowers 1
Author(s) -
Robinson R. G.
Publication year - 1975
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1975.00021962006700010027x
Subject(s) - achene , row , sunflower , agronomy , mathematics , yield (engineering) , helianthus annuus , horticulture , biology , physics , computer science , database , thermodynamics
The effect of row direction on sunflower ( Helianthus annuus L.) performance was researched because young sunflowers are phototropic and after flowering ceases most heads face the east. Sunflowers planted in east‐west and north‐south rows in large, rectangular plots were compared in 1972 and 1973 at Rosemount, MN. Wheel‐spoke plant alignments in circular plantings were used to evaluate row directions in 1973. Row direction did not influence achene yield, weight, size, nor oil percentage, but plants lodged significantly more in EW than in NS rows both years. However, in the circular plantings, lodging differences did not occur. Row direction effect on sunflowers is not an important consideration for commercial production. For some research plots, EW rows with plot labels on the east end are easiest to evaluate because most heads face the viewer.