Beyond Sensor Technologies Where Do We Go ? What’s Next ? Where Others Have Been.

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Presentation transcript:

Beyond Sensor Technologies Where Do We Go ? What’s Next ? Where Others Have Been

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Ferte and Balp 1937 Optical Weeder

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Marihart 1943 Variable rate nutrient, fungicide and herbicide

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Palmer and Owens 1969 Chemcial weeder first to use digital computer

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Henderson and Grafton 1975 First solid-state (LED) plant sensor

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Stafford et al Handheld turf sensor

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Beck and Vyse 1992 Solid state weeder

’ ‘50‘702000‘60‘80‘90 Prof. Robert Olson Warned about Nitrate Leaching Graduate Students : Curt Clausen, Bill Raun, Albert Simms Producers had “discovered” the merits of N fertilizer on corn yields and “assumed” that: If a little is good, more would be better !

’ ‘50‘702000‘60‘80‘90 High – Nitrate Groundwater in Nebraska Deep soil cores showed nitrate leaching toward groundwater. Causes : Too much N fertilizer and water Producers said - “If you want us to apply less N fertilizer, you will have to come up with a practical way to detect a pending deficiency and fix it before it reduces yield ! ! ! > 10 mg/L NO 3 -N

’ ‘50‘702000‘60‘80‘90 Hageman Enlightenment Regarding C & N Schepers takes sabbatical leave with Dick Hageman and works with Fred Below to explore ways to monitor corn N status. Leaf chlorophyll is key to high yields !

’ ‘50‘702000‘60‘80‘90 Concern over Nitrate and Pesticide Leaching Burlington Northern Railroad funds project to protect groundwater quality. Nitrification inhibitor Realistic N fertilizer rates and timing Richard Ferguson Raun Lohry (Nutra-Flo) Developed leaf N vs. chlorophyll concentration relationships for corn at different growth stages

’ ‘50‘702000‘60‘80‘90 Problem – Variability in Yield Responses to N Pioneer HiBred studies (Curt Clausen) Schuyler, Page, ???? Nebraska How to compare corn yield responses to N fertilizer rates across years, hybrids, and locations ? Used Relative Yield to evaluate N fertilizer effects across studies

What portion of corn-yield variability should realistically be attributed to climatic conditions after silking ? Question <5% 5% 10% 15% 20% 25% 30% 35% >40% ?

July 12, 2012 August 11, 2012 Value of Irrigation

Thermal IR image Water Distribution Problems Someplace in Kansas 2011

’ ‘50‘702000‘60‘80‘90 Minolta Introduces SPAD Meter Project manager (Todd Peterson) Graduate student (Tracy Blackmer) SPAD meters used to make spoon-feeding decisions for fertigation in MSEA studies “Sufficiency Index” concept is published

Canopy sensors can not quantify excess N N Status Similar

’ ‘50‘702000‘60‘80‘90 Real-time Active Sensor History Heege and Reusch 1995 First commercial variable rate applicator

Early N Planting In-season N V6V9 Tasseling When? How much? How much early? In season? Sensor based N uptake

40% of requirement after silking Building Block

Irrigated Corn Silking

Corn YieldNUE All Yield Fertilizer Only Yield EONR = 176 kg/ha Economic Optimum N Rate FREE yield “Nitrogen Use Efficiency” Fertilizer Effect Total N Effect

Pay More Attention to Cultural Practices ? Corn is the Wrong Crop ? Data Interpretation ? Algorithm Development ? Product Quality Issues ?

Seed Corn Male Female

RapidSCAN V8 Do high yielding hybrids have the same nutrient uptake patterns as older hybrids ? ….similar nutrient balance ?

Silking

Harvest

Forget about - building a better mouse trap ? Rather Start by working with farmers to - catch 50 – 75% of the mice with existing technologies ? Drive and Fly Safely

Jim Schepers