Agtm 405 “Correlation of Yield Maps with Infrared Photography”


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AgTM 405


“Correlation of Yield Maps with Infrared Photography”



The Advantages of Infrared Photography Correlated to Yield Maps



Madison Farms



Madison Farms

  • 3rd generation farm since 1914

  • 15,000 acre farm

  • Crops grown include: Alfalfa, Canola, Corn, Buckwheat, Wheat, Potatoes, & Peas

  • 6,479 irrigated acres

  • Desert acres applied with bio-solids from Portland metro areas

  • Employs 18-24 people



Circle #17



Early Season Infrared - C17

  • Picture taken on August 11, 1997



Early Season Infrared - C17

  • Small future yield changes starting to show up



Early Season Infrared - C17



Mid-Season Infrared - C17

  • Picture taken on August 23, 1997

  • Yield changes become less noticeable



Late Season Infrared - C17

  • Picture Taken on Sept 4, 1997



Raw Yield Data - C17

  • Yield decrease in Northwest corner



Raw Yield Data - C17



Raw Yield Data - C17

  • Yield monitor malfunction



Average and Contour - C17

  • After average and contour yield decreases show up the same as monitor malfunctions



Circle #3



Early Season Infrared - C3



Infrared with Contours - C3

  • Infrared not showing a yield reduction on the West side



Late Season Infrared with Contours - C3

  • Picture taken September 4, 1997

  • Center ring showing up



Late Season Infrared - C3

  • Center ring showing up

  • Ring caused by rotator sprinkler pressure set to high causing leaf damage to corn crop



Late Season Infrared with Contours - C3

  • Picture taken September 4, 1997

  • Noticeable ring showing up in the center of the circle



Raw Combine Data - C3



Raw Combine Data - C3

  • Slight center ring yield reduction showing up at harvest time



Raw Combine Data - C3

  • Slight center ring yield reduction showing up at harvest time.



Average and Contour - C3

  • Assumed low yield on West side

  • No center ring showing up



Circle # 53



Infrared - C53



Infrared - C53

  • Outer edge of the circle shows up in the infrared



Infrared with Contour Lines C53

  • Yield contour lines show the sandy ridge and the reduction in yield



Raw Data - C53



Average and Contour - C53

  • Sand ridge shows yield reduction



Average and Contour - C53

  • Outer ring of the circle shows yield reduction



Circle #55



Infrared - C55



Infrared - C55

  • Infrared shows no future reduction in yield at this spot



Infrared with Contours - C55



Infrared with Contours - C55

  • Yield map contours and the infrared do not show the same location for yield reduction



Average and Contour - C55

  • Large yield reduction in the Northeast corner

  • Center pivot reversed before the reverse stops



Raw Data - C55



Raw Data - C55

  • Combine monitor shows actual low yield at arrow due to sandy ridge



Circle #16



Corn Yield - C16



The Question is “What causes the low yield spot”?



Nitrogen - C16

  • Sample date 2/12/1997

  • Red area 29 lbs/acre

  • Yellow area 85 lbs/acre

  • Green area 141 lbs/acre



Potassium - C16

  • Red area 368 lbs/acre

  • Yellow area 501 lbs/acre

  • Green area 634 lbs/acre



Ph. - C16

  • Red area 6.8 p.h. level

  • Yellow area 7.45 p.h. level

  • Green area 8.09 p.h. level



Phosphorus - C16

  • Red area 33 lbs/acre

  • Yellow area 51 lbs/acre

  • Green area 69 lbs/acre



Iron - C16

  • Red area 5 lbs/acre

  • Yellow area 12 lbs/acre

  • Green area 19.9 lbs/acre



Magnesium - C16

  • Red area 3 lbs/acre

  • Yellow area 6.5 lbs/acre

  • Green area 9.9 lbs/acre



Corn Yield - C16 Rocky Out-Cropping



Circle #12



Raw Combine Yield Data on Canola - C12



Average and Contour Canola C12



Circle #21



Raw Combine Data - C21

  • Lower yield shows up across the center of the circle



Average and Contour - C21



Potassium - C21



Nitrogen - C21



Phosphorus - C21



Sulfur - C21



Summarizing the Advantages of Infrared Photography

  • Shows potential yield reduction due to irrigation, soil type or fertility problems

  • Helps in diagnosing combine monitoring errors that show up on yield maps

  • Low cost - less than $.50 per acre






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