Premium
Intercultivar Competition in Sunflower Test Plots 1
Author(s) -
Fick G. N.,
Swallers C. M.
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/agronj1975.00021962006700060003x
Subject(s) - sunflower , achene , helianthus annuus , cultivar , competition (biology) , agronomy , biology , mathematics , yield (engineering) , rust (programming language) , horticulture , ecology , materials science , computer science , metallurgy , programming language
The use of single‐row test plots would greatly facilitate evaluation of experimental sunflower ( Helianthus annuus L.) cultivars, particularly when the number of entries is large and seed or land area is limited. The objectives of our study were to obtain information on intercultivar competition, and to determine whether single‐row plots will provide reliable performance data. Eight sunflower cultivars representing diverse agronomic types were grown at Fargo, N. D., in 1972 and 1973. Seed (achene) yields for individual cultivars ranged from 50% higher to 25% lower in one‐row as compared to three‐row plots. These differences were highly significant and indicated the need for bordered plots in preliminary yield testing. One hundred‐ seed weights were also influenced significantly by intercultivar competition in one‐row plots but to a lesser degree than seed yields. Competition did not significantly affect days to 50 percent flowering, plant height, rust reaction, test weight, and seed oil percent, which suggests that these traits can be estimated accurately in single‐row plots.