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This article in AJ

  1. Vol. 84 No. 3, p. 394-398
     
    Received: Feb 11, 1991
    Published: May, 1992


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doi:10.2134/agronj1992.00021962008400030009x

Early-Season Production Systems Utilizing Indeterminate Soybean

  1. B. R. Savoy,
  2. J. T. Cothren  and
  3. C. R. Shumway
  1. College of Agric., Arkansas State Univ., State Univ., AR 72467

Abstract

Abstract

Soybean [Glycine max (L.) Merr.] yield and yield components can be influenced by production practices that affect soil moisture and plant architecture. This study evaluated the effects of variations in soil moisture and inter-row spacing on seed yield and yield components of an indeterminate soybean grown in an early-season production environment in south-central Texas. ‘Williams 82’ soybean (Maturity Group III) was planted in mid-April in 1988 and 1989 near College Station, TX (30° 32′ 33″ N lat) in a Ships clay (very fine, mixed, thermic Udic Chromusterts) that is intergraded with Weswood silt loam (Fluventic Ustochrepts). Harvest occurred in late August. Soil moisture regimes were irrigation and no irrigation; inter-row spacings were 0.36 and 1.02 m. Seed yields were greater in 1989 (4260 kg ha−1) than in 1988 (3550 kg ha−1). Soil moisture level and row-spacing treatments had no effect on seed yield either year. Year-by-inter-row spacing interactions were significant for single seed mass and total seed and pod number. Seed size was greater in 1989 than in 1988. The year-by-soil moisture level interaction was significant for mean seed per pod. Both years, yield component characteristics were more consistent in 1.02-m rows than in 0.36-m rows. These results indicate that adequate yields, with maturation in late-August, are possible using an adaptable indeterminate soybean in an early-season production environment in south-central Texas.

Contribution of the Dep. of Soil and Crop Sciences, Texas A&M Univ., and the Texas Agric. Exp. Stn. Technical article no. 27017.

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