Yield Comparisons:

• Crop: Corn (Maize) - 'Pioneer x304c'
  
• Year: 1980
  
• Location: USA, GA, Tift County, Gin House Field, Block B
  
• Soil Type, USDA Series: Tifton loamy sand
  
• Meteorological Observations: Gin House Field, 80
  

Research Objective: Determine the effect of irrigation management on late season corn.
Treatments:
 1.Control - Tensiometer - shallow
 2.No irrigation
 3.Lambert model
 4.Hammill model
 5.Tensiometer - deep
 6.Fixed irrigation

Basic Crop Management: PLANTED - 31 Jul 1980 (rows 0.9m apart); HARVEST - 01 Dec 1980 (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

 Control - Tensiometer - shallow

• Irrigation Dates and Amounts:Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 2.10; Individual plots - 2.03, 3.07, 0.41, 3.42, 1.34, 2.27 Text File
  

  No irrigation

• Irrigation Dates and Amounts: Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 2.01; Individual plots - 3.52, 2.06, 3.15, 1.57, 0.77, 0.99 Text File
  

  Lambert model

• Irrigation Dates and Amounts: Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 2.30; Individual plots - 1.97, 0.79, 2.00, 4.48, 3.79, 0.76 Text File
  

  Hammill model

• Irrigation Dates and Amounts: Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 1.80; Individual plots - 3.05, 2.65, 1.31, 1.96, 0.58, 1.25 Text File
  

  Tensiometer - deep

• Irrigation Dates and Amounts: Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 1.64; Individual plots - 2.51, 2.44, 0.47, 0.84, 1.18, 2.41 Text File
  

  Fixed schedule

• Irrigation Dates and Amounts: Text Format;
• Phenology: Emergence - 04 Aug 1980; Pollination (R2) - 24 Sep 1980; Maturity (Black layer) -
• Stand Count:
• Soil Water Pressure Observations: Tensiometer & Gypsum Block
  
• Yield Corn Grain, 15.5% moisture, T/ha: Average - 2.04; Individual plots - 3.26, 0.69, 1.67, 3.32, 1.13, 2.15 Text File