Potential for Sensor Based Systems in Corn-Sugar Beet Rotations John A. Lamb Department of Soil, Water, and Climate University of Minnesota – St. Paul.

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Presentation transcript:

Potential for Sensor Based Systems in Corn-Sugar Beet Rotations John A. Lamb Department of Soil, Water, and Climate University of Minnesota – St. Paul

Southern Minnesota Sugar Beet Rotations Current –Sugar beet-soybean-corn 78% of acreage –Future may include Sugar beet-corn-soybean-corn.. Quality is job 1. N is the key! 2003 increased N management put $141 per acre in grower’s pockets. Growers think they need a lot of N fertilizer to grow 200 bushel corn!

Southern Minnesota Beet Sugar Cooperative Area

Whole Rotation Soybean-Corn- Sugar beet Year 1 –Located plots and grew soybean. Year 2 –Apply N fertilizer at rates of 0, 120, and 200 pounds/acre to large plots. –Grew corn, harvest corn, and soil sampled for soil nitrate-N. Year 3 –Apply N fertilizer at 6 rates to large plots. –Grow sugar beet for yield and quality.

Whole Rotation Effects on Soil Nitrate-N (Soybean-Corn) N rate 2003OliviaMaynard pounds/acreSoil nitrate-N 0-4 ft. (lb/acre)

Possible sensor uses Better N management for corn preceding sugar beet in the rotation. –Less residual soil nitrate-N Delineate management zones for deep soil sampling. –For corn and/or sugar beet production years.

Southern Minnesota Sugar Beet Rotations Future –Sugar beet-corn-soybean-corn Soybean rust Soybean cyst nematode Soybean iron chlorosis Sugar beet root diseases

Whole Rotation: Sugar beet-corn Year 1 –Grow sugar beet with five N rates in large plots. –Measure beet yield, beet quality, and soil nitrate-N Year 2 –Grow corn –Apply four N rates with in the year 1 large plots –Measure corn yield and soil nitrate-N.

Whole Rotation: Sugar beet-corn This a project in progress. Two locations established spring 2002, 2003, and Example of one of 2002 locations.

Whole Rotation Effects Beet-Corn Maynard 2002 N rate 2002 Fertilizer plus Soil N 2002 Rec suc Soil nitrate-N Beet top N lb/acre

Whole Rotation Effects on Soil Nitrate-N Beet-Corn Maynard

Possible sensor uses Better N management for corn following sugar beet in the rotation. –Sugar beet top N credit. –N rec prediction as soil nitrate test is useless.

I’m out of steam!

Whole Rotation Effects Beet-Corn Olivia 2002 N rate 2002 Fertilizer plus Soil N 2002 Rec suc Soil nitrate-N Beet top N lb/acre

Grain Yield: Corn following Sugar beet Olivia, MN 2003

Chlorophyll: Corn following Sugar beet Olivia, MN 2003

Whole Rotation Effects on Soil Nitrate-N Beet-Corn Olivia