Maize Irrigation Study, 1981, Georgia Coastal Plain

Yield Comparisons:
Study:

Research Objective:
Treatments:
 1.Lambert model
 2.Tensiometer at 30cb - deep (45-60 cm)
 3.Control - Tensiometer at 30cb - shallow (15-30 cm)
 4.Wilting symptoms
 5.Stages of growth
 6.No irrigation

Basic Crop Management: PLANTED - 11 Mar 1981 (rows 0.9m apart); HARVEST - 14 Jul 1981 (2-row grain combine); 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:
 Lambert model
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 10.90; Individual plots - 10.06, 10.79, 11.46, 11.27 Text File
Treatment 2:
 Tensiometer at 30cb - deep (45-60 cm)
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 10.20; Individual plots - 9.83; 10.84, 10.33, 9.80 Text File
Treatment 3:
 Control - Tensiometer at 30cb - shallow (15-30 cm)
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 10.06; Individual plots - 9.83, 9.18, 10.32, 10.92 Text File
Treatment 4:
 Wilting symptoms
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 9.07; Individual plots - 9.57, 8.78, 9.16, 8.78 Text File
Treatment 5:
 Stages of growth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 7.85; Individual plots - 7.62, 8.96, 7.91, 6.91 Text File
Treatment 6:
 No irrigation
  • Phenology: Emergence - 26 Mar 1981; Pollination (R2) - 01 Jun 1981; Maturity (Black layer) - 02 Jul 1981
  • Stand Count:
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 0.50; Individual plots - 0.71, 0.27, 0.53 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.