Cotton (Gossypium birsutum L.) Yield, Stand, and Bolls per Plant as Influenced by Seed Class and Row Width
1971
Peacock, H. A. | Reid, J. T. | Hawkins, B. S.
Unsorted seed of ‘Deltapine 45A’ and seed separated into almost equal lots of light, medium, and heavy seed (seed classes) were planted in 102-cm (regular) and 25-cm (narrow) rows (row widths) at the rate of six seed per 30.5 cm. Plants from the light seed class were taller 75 days after emergence than were plants from any other seed class regardless of row width. Lint yield was not affected by row width or seed classs. The interaction between row widths and seed classes was significant and, in regular-width rows, plants from unsorted seed produced more lint than did plants from the heavy seed class. Unsorted seed produced more barren plants than did other seed classes. This result was apparently due to the larger number of plants produced from the unsorted seed in narrow rows. Unsorted, light, and medium seed classes produced more 1-boll plants than did the heavy seed class. As plant population increased, there was an increase in the number of 1-boll plants. Seed class had no effect on the number of 2-boll plants; however, regular-width rows produced significantly more 2-boll plants than did narrow rows. The medium seed class produced fewer 3-boll plants than other seed classes regardless of row width, and regular-width rows produced more 3-boll plants than did narrow rows. Due to an interaction between row width and seed class, unsorted seed produced more 3-boll plants than the light, medium, or heavy seed class in regular-width rows. Seed planted in regular-width rows produced more plants with more than three bolls than in narrow rows. Under the conditions of this test there were no advantages from either seed sorting or narrow rows.
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