Yield Comparisons:

• Crop: Peanuts - 'Georgia Green'
  
• Year: 2002
  
• Location: USA, GA, Tift County, Lang Farm
  
• Soil Type, USDA Series: Tifton loamy sand
  
• Meteorological Observations:
  
  Daily: Lang Farm, 2002
  Hourly: Jan-Feb, Mar-Apr, May-Jun, Jul-Aug, Sep-Oct, Nov-Dec
  
  

Research Objectives:

1. Develop irrigation management systems for consistent high yield and quality peanuts for loamy sand soils.
2. Establish soil water requirements needed for consistent pod development.
3. Validate peanut irrigation models (especially with respect to restricted irrigation) and evalutate envirocaster and simple Pan scheduling equipment.

Basic Crop Management: PLANTED - 02 May 2002; HARVEST - 12 Sep 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
Grade Values
Cost Breakdown

Easy Pan (Evaporation Pan) - LDN Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 44; % infected - 0.367 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 4.00; Individual plots - 4.09, 4.20, 3.36, 4.35 Text File
  

Irrigator Pro - LEPA Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 49.75; % infected - 0.415 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 3.37; Individual plots - 3.10, 4.29, 1.86, 4.22 Text File
  

Irrigator Pro - LDN Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 42.25; % infected - 0.352 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 3.43; Individual plots - 3.25, 3.39, 3.21, 3.88 Text File
  

Growth Stage - LEPA Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 47.5; % infected - 0.396 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 3.67; Individual plots - 4.38, 3.86, 2.89, 3.57 Text File
  

Growth Stage - LDN Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 40.5; % infected - 0.338 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 4.24; Individual plots - 3.78, 5.20, 3.39, 4.59 Text File
  

Watermark at 28 cm or deeper depths avg greater than 40 kpa - LDN Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 42.625; % infected - 0.355 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 3.87; Individual plots - 4.37, 4.52, 2.58, 4.01 Text File
  

Watermark at 28 cm or deeper depths avg greater than 40 kpa - LEPA Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 57.5; % infected - 0.479 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 3.53; Individual plots - 3.52, 3.33, 3.28, 4.01 Text File
  

Two inches per week less rainfall - LDN Nozzles

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 50.25; % infected - 0.419 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 4.16; Individual plots - 3.98, 4.73, 3.43, 4.50 Text File
  

Dry Land

• Irrigation Dates and Amounts: Text Format;
• Stand Count: Text Format;
• Pod Sets: Text Format;
• Canopy Measurements: Text Format;
• Soil Water Pressure Observations: Watermarks
  
• TSWV Counts: Average - 49.5; % infected - 0.413 Text File
  
• Yield Peanuts, 7% moisture, T/ha: Average - 1.33; Individual plots - 1.75, 0.77, 1.17, 1.64 Text File