Soybean Irrigation Study, 1979, Georgia Coastal Plain

Yield Comparisons:
Study:
  • Crop: Soybeans
  • Year: 1979
  • Location: USA, GA, Tift County, Gopher Ridge Farm, Blocks E & I
  • Soil Type, USDA Series: Bonifay sand
  • Meteorological Observations: Gopher Ridge, 79

Research Objective: Compare effectiveness of several irrigation management schemes on soybean root growth and yield. Examine effects of liming and of supplemental magnesium additions on growth and yield.
Treatments:
 1.Control - Lime - Shallow 0.3 bar
 2.Lime - Shallow split
 3.Lime - Shallow 0.6 bar
 4.Lime - Deep 0.6 bar
 5.Lime - No irrigation
 6.Lime - Deep 0.3 bar

Basic Crop Management: PLANTED - 12 Jun 1979; HARVESTED- 15 Nov 1979; TILLAGE - Moldboard Plow (30 cm deep plus smoothing and bed shaping), wheel traffic controlled at 1.2 m centers; FERTILIZATION - Typical Extension Recommended Rate; WEED & PEST CONTROL: Typical Extension Recommendations.
Chronological Treatment and Observation Details

Observations and data sets for individual treatments (crop years) follow:
Treatment 1:
 Control - Shallow 0.3 bar
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha:Average - 2.62 Text File
Treatment 2:
  Shallow split
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha: Average - 2.65 Text File
Treatment 3:
  Shallow 0.6 bar
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha: Average - 2.44 Text File
Treatment 4:
  Deep 0.6 bar
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha: Average - 2.58 Text File
Treatment 5:
  No irrigation
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha: Average - 1.66 Text File
Treatment 6:
  Deep 0.3 bar
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 17 Jun 1979; Pollination (R2) - 21 Aug 1979; Maturity -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Soybeans, 12% moisture, T/ha: Average - 2.68 Text File
For more information on the study and its interpretation contact:
Dr. Jim Hook Professor, Soil and Water Management
Crop and Soil Sciences Department and NESPAL
The University of Georgia, College of Agricultural and Environmental Sciences
P.O. Box 748, Tifton, GA 31793-0748
e-mail: jimhook@tifton.cpes.peachnet.edu

Page developed by James E. Hook, Amanda Richards, and Linsey Forlow.
Last Modified on 29 June 2000.