Maize Irrigation Study, 1981, Georgia Coastal Plain

Yield Comparisons:
Study:

Research Objective:

    1. Determine the number of stress days added by delaying irrigation for 1, 2, and 3 days.
    2. Relate the difference in leaf temperature and ambient temperature to stress days, to visual stress symptoms and to yield reductions.
    3. Compare relative yield reductions caused by the irrigation delay.
    4. Estimate the probabilities of accumulating rainfall during each delay period.
Treatments:
 1.Control - Tensiometer trigger - on time
 2.Tensiometer trigger - one day delay
 3.Tensiometer trigger - two day delay
 4.Tensiometer trigger - three day delay

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:
 Control - Tensiometer trigger - on time
 Treatment 2:
 Tensiometer trigger - one day delay
 Treatment 3:
 Tensiometer trigger - two day delay
 Treatment 4:
 Tensiometer trigger - three day delay
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.