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Agronomy Journal Abstract -

Effect of Cultural Practices on Grain Yield and Yield Components in Irrigated Wheat1


This article in AJ

  1. Vol. 68 No. 1, p. 132-134
    Received: June 6, 1975

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  1. A. D. Day,
  2. Aschalew Alemu and
  3. E. B. Jackson2



Since wheat (Triticum aestivum L.) is now grown on beds in the southwestern U.S., experiments were conducted at Yuma, Ariz., to study effects of planting methods, seeding rates, and row positions on beds on the yield and quality of grain from wheat. Two planting methods (on the flat and on beds), three seeding rates (29, 58, and kg/ha), and four row positions on beds (north, south, east, and west) were observed.

Flat and bed methods of planting resulted in similar wheat grain yields and grain volume weights. The low rate of seeding resulted in more wheat seed per head and fewer heads/unit area than did the higher rates of seeding. The net effect of seeding rates on seed weight and grain yield in both flat and bed plantings was not significant.

Wheat grown on beds with an east-west orientation produced more heads per unit area, more seed head, and higher grain yields than did wheat planted on beds with a north-south orientation. The south row position on east-west beds resulted in more heads/unit area, more seed/head, and higher grain yields than did the north row position. Row position on east-west beds had no significant effect on seed weight.

When wheat was grown on north-south beds higher rates of seeding resulted in heavier seeds than did the lower rate; however, heads/unit area, seed/head, and grain yields were not influenced by seeding rates. Although west rows produced more seed/head and heavier seeds than did east rows, row position on north-south beds had no effect on heads per unit area and grain yields.

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