Maize Irrigation Study, 2002, Georgia Coastal Plain

Yield Comparisons:
Study:

Research Objective: Determine the effects of soil moisture pattern on corn yield and on stalk and root diseases.
Treatments:
 1.High Flow 8 inch depth
 2.High Flow 12 inch depth
 3.High Flow 16 inch depth
 4.Low Flow 8 inch depth
 5.Low Flow 12 inch depth
 6.Low Flow 16 inch depth

Basic Crop Management: PLANTED - 20 Mar 2002; HARVEST - 05 Aug 2002 ; 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
Inputs


Observations and data sets for individual treatments (crop years) follow:
Treatment 1:
High Flow 8 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format;
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 12.19; Individual plots - 13.41, 12.63, 13.68, 9.03 Text File
Treatment 2:
High Flow 12 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format;
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 11.57; Individual plots - 12.58, 11.36, 12.08, 10.26 Text File
Treatment 3:
High Flow 16 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format;
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 11.32; Individual plots - 12.23, 11.60, 11.46, 10.01 Text File
Treatment 4:
Low Flow 8 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format;
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 10.58; Individual plots - 10.97, 12.10, 9.68, 9.56 Text File
Treatment 5:
Low Flow 12 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format;
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 11.11; Individual plots - 11.80, 9.81, 10.61, 12.20 Text File
Treatment 6:
Low Flow 16 inch depth
  • Irrigation Dates and Amounts: Text Format;
  • Phenology: Emergence - 01 Apr 2002; Maturity (Black layer) - 19 Jun 2002
  • Stand Counts: Text Format:
  • Plant Heights: Text Format;
  • Ear Evaluations: Text Format;
  • Soil Water Pressure Observations: Watermarks
  • Yield Corn Grain, 15.5% moisture, T/ha: Average - 10.20; Individual plots - 8.62, 11.17, 10.40, 10.62 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 21 March 2003.