Cotton Irrigation Study, 1998, Georgia Coastal Plain

Yield Comparisons:

Study:

Research Objective:
Treatments:
 1.No irrigation from first square + 30 days
 2.Extension recommendations
 3.Full irrigation
 4.No irrigation from first boll + 30 days
 5.Adcon telemetry (watermarks)
 6.No irrigation

Basic Crop Management: PLANTED - 06 May 1998; HARVEST - 02 Oct 1998; 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:
 No irrigation from first square + 30 days
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.52; Individual plots - 3.93, 3.62, 3.86, 3.37, 2.81
    Text File
Treatment 2:
 Extension recommendations
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.90; Individual plots - 3.70, 3.95, 4.38, 3.83, 3.63
    Text File
Treatment 3:
 Full irrigation
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.59; Individual plots - 3.52, 2.78, 4.20, 3.92, 3.55
    Text File
Treatment 4:
 No irrigation from first boll + 30 days
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.55; Individual plots - 2.90, 3.62, 4.01, 3.74, 3.50
    Text File
Treatment 5:
 Adcon telemetry (watermarks)
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 3.67; Individual plots - 3.39, 4.01, 4.28, 3.93, 2.73
    Text File
Treatment 6:
 No irrigation
  • Phenology: Emergence - 11 May 1998; Pollination (R2) - ; Maturity - 08 Sep 1998
  • Stand Count:
  • Soil Water Pressure Observations: Tensiometer & Gypsum Block
  • Yield Cotton, T/ha: Average - 2.60; Individual plots - 1.95, 3.29, 3.88, 2.63, 1.24
    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.