Cotton Irrigation Study, 1996, Georgia Coastal Plain

Yield Comparisons:
Study:

Research Objectives:

    1. Develop irrigation management systems for consistent high yield and quality cotton for loamy sand soils.
    2. Establish soil water requirements needed for consistent growth and boll development.
    3. Validate cotton irrigation models and scheduling equipment for the Georgia Coastal Plain.
Treatments:
 1.Control - Shallow tensiometer, full season, next day
 2.Deep tensiometer, full season, next day
 3.Shallow tensiometer, full season, delay 2 days
 4.Shallow tensiometer, full season, except July
 5.Shallow tensiometer, full season, except August
 6.No irrigation

Basic Crop Management: PLANTED - 26 Apr 1996; HARVEST -; 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 tensiometer, full season, next day
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.44; Individual plots - 3.92, 2.59, 3.19, 3.76, 3.72
    Text File
Treatment 2:
 Deep tensiometer, full season, next day
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.28; Individual plots - 3.58, 2.57, 3.51, 3.83, 2.92
    Text File
Treatment 3:
&nbspShallow tensiometer, full season, delay 2 days
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.32; Individual plots - 3.15, 2.99, 2.89, 3.74, 3.85
    Text File
Treatment 4:
 Shallow tensiometer, full season, except July
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 1.86; Individual plots - 3.21, 2.09, 1.05, 1.97, 1.49
    Text File
Treatment 5:
 Shallow tensiometer, full season, except August
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.40; Individual plots - 3.38, 2.93, 3.24, 4.43, 3.01
    Text File
Treatment 6:
 No irrigation
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 06 May 1996; Pollination (R2) - ; Maturity (Black layer) -
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 2.28; Individual plots - 2.95, 2.36, 2.22, 2.78, 1.10
    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.