Irrigation Scheduling Smart Phone App Gene Stevens, Professor-Cropping Systems MU-Fisher Delta Research Center Program is a Multi-Discipline Team Effort.

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Presentation transcript:

Irrigation Scheduling Smart Phone App Gene Stevens, Professor-Cropping Systems MU-Fisher Delta Research Center Program is a Multi-Discipline Team Effort

Evapotranspiration (ET) Total of two processes –Evaporation is water lost from soil surface –Transpiration is water lost from plant short grass alfalfa ETo ETr Reference Crops

ETo at Portageville station January December Daily ETo, inches Based on Penman-Monteith Equation

Check with NRCS

University of Georgia

237 GA cotton fields with 71 users lb lint/acre by checkbook vs 1259 lb lint/acre by App 12.2 inches by checkbook vs 3.0 inches by app (75% less) lb lint/acre by checkbook vs 1573 lb lint/acre by App 16.8 inches by checkbook vs 10.1 inches by app (40% less) Source: Dr. George Vellidis

Electronic Weather Station Network University of Missouri Mesonet

modified atmometer- ETgage In Missouri, five automatic ET gages will be installed and monitored near existing electronic weather stations.

Linking Information Together Standardized Penman- Monteith Equation Crop Coefficient based on Degree Days Calculated Daily Crop Water Use Growth stage

Calibration in 2014 Corn Soybean Cotton Pivot Rice

Reading and logging rainfall by field

Step 1. Crop Water Use Generation 1- MU Phone App

Source: Ohio Agronomy Bull Sand Loamy Sandy Fine Loam Silt Silty Clay Silty Clay sand loam sandy loam clay loam clay loam Available Water Holding Capacity Volumetric Soil Water Inch H 2 O/Inch Soil Field Capacity Permanent Wilting Point Allowable Depletion

Riding Our Bike While We Building It Pre-Testing New Parts Before Installation

Clarkton MO Cotton- Loamy Sand Lint per acre Source: Andrea Jones and Zach Straatmann

Requires Field Information

*, **, ***, XXX are 70%, 80%, 90%,>100% of MAD (Management Allowed Depletion)

Documentation

Gene Stevens, John Travlos, Stephen Martin, Zach Straatmann, Earl Vories, Andrea Jones, Joe Henggeler,, Pat Guinan, Ray Massey, A.J. Foster, Van Ayers, Steve Hefner, and John Hester TEAM EFFORT