Notes

Slide Show

Outline

1	PEANUT IRRIGATION
2	Irrigated Peanut Acres in Georgia*
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5	To Effectively Schedule Irrigation, you need Knowledge Base of: Soil type – sand, loamy sand, sandy loam, sandy clay loam Equipment limitations – pivot, hardhose Water resource – underground, surface Crop water needs Highest water requirement during the various physiological growth stages of each crop
6	Weekly Water Use by Peanut
7	Weekly Water Use by Peanut
8	Rainfall Totals – Tifton June – August compared to Normal
9	Maximum Air Temperature Coastal Plain Experiment Station - Tifton
10	Maximum Air Temperature Coastal Plain Experiment Station - Tifton
11	Temperature Measured 3 Inches Above Soil Surface Strip Till vs. Conventional, RDC Pivot - Tifton
12	Temperature Measured 3 Inches Above Soil Surface Strip Till vs. Conventional, RDC Pivot - Tifton
13	Critical Periods for Water Use by Peanut
14	Water Deficit Affect on Peanut reduced flowering and pegging when stress occurs at 50-80 DAP delayed flowering reduced total # of flowers significantly reduced root growth when stress occurs at 20-50 DAP Significant yield reduction when deficit occurs during the 50-110 DAP time period.
15	Irrigator Pro^® Released in 2000 Requires rain gauge and soil thermometer Soil probe Revised version for ’03 Available on web after April 1 Version will be based on mathematical equations, not rules Part of FarmSuite Software available at a cost of $25 through: GPC GPPA Software is “share ware”
16	UGA EASY Pan Irrigation Scheduler EASY = Evaporation-based Accumulator for Sprinkler-enhanced Yield developed by Ag Engineers at UGA provides in-field monitoring of crop water needs operates on basic principle of potential evapotranspiration (PET) unit made with simple, common components (washtub, toilet bowl float, 12”x 15” sheet of 18 gauge aluminum sheet, etc.) Extension bulletin on internet @: www.ces.uga.edu/pubs/pubsubj.html (look under Bio and Ag Engineering heading, Bulletin 1201)
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19	Irrigation Research Irrigation strategies UGA (Hook, Beasley, Baldwin) Sub-surface drip USDA-NPRL (Sorensen), AU (Hartzog), & UGA (Beasley) Water use efficiency (new cultivars) USDA-NPRL (Rowland) & UGA (Beasley)
20	Irrigation Strategies Research Initiated in 2002, conducted 2002-2004 Investigators – Jim Hook, John Beasley, John Baldwin Conducted at Lang Farm (CPES) in Tift County and Stripling Irrigation Research Park in Mitchell County Eight comparisons + non-irrigated treatment Cultivar X Irrigation Strategy interaction in 2004
21	Cultivar Interaction with Irrigation Strategies Conducted at UGA’s Stripling Irrigation Research Park near Camilla 12 cultivars and 3 irrigation strategies Irrigator Pro – 5 irrigations = 5.25 in. UGA Easy Pan – 3 irrigations = 2.5 in. Experimental strategy (Growth Stage) – 6 irrigations = 5.5 in. Growth Stage model Weeks 5&6 after planting – 0.5 inches (less rainfall) Weeks 7-9 – 0.75 inches Weeks 10-16 – 1.5 inches Weeks 17-20 – 0.5 inches
22	Weekly Water Use by Peanut
23	Weekly Water Use by Peanut 2 inches/wk (red line) vs. Growth Stage strategy (green line)
24	Weekly Water Use by Peanut
25	Irrigation Strategies 2002-2004, Yield (lbs/A)
26	Irrigation Strategies 2002-2004, Irrigation Inches Applied
27	Irrigation Strategies
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