Planning and Costing Agriculture's Adaptation to Climate Change
Does Optimum Surface Landforming offer Precision Agriculture's Highest ROI? David Cox
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Transcript of Does Optimum Surface Landforming offer Precision Agriculture's Highest ROI? David Cox
DOES OPTIMUM SURFACE LANDFORMING OFFER PRECISION AGRICULTURE'S
HIGHEST ROI?
80/20 RULE OF PRECISION AGRICULTURE
80% OF YIELD VARIABILITY & LOSS IS CAUSED BY 1 THING…..
WATER - BOTH TOO LITTLE AND TOO MUCH.
SO FOCUS ON IMPROVING THATFIRST
PONDING KILLS YIELD & PROFIT
MUNGBEAN YIELD VARIES FROM 0% TO 100% WHERE PONDING DEPTH VARIES FROM ONLY 50MM TO 0MM.
PONDING CAUSES NITROGEN LOSS
PONDING DISRUPTS MACHINERY OPERATIONS
WET DEPRESSION AREAS DISRUPT HARVEST
WHAT IS OPTIMUM SURFACE LANDFORMING?
THE PROCESS OF RESHAPING THE LAND SURFACE TO AN OPTIMISED 3D SURFACE USING EARTHMOVING EQUIPMENT CONTROLLED BY RTK GPS MACHINE CONTROL SYSTEM
WHY OPTIMUM SURFACE LANDFORMING?
ACHIEVES DRAINAGE BENEFITS BY ELIMINATING ALL REVERSE GRADES THAT FORM DEPRESSIONS
SMOOTHS THE SURFACE TO PROMOTE MORE UNIFORM INFILTRATION
ADVANTAGES OVER TRADITIONAL LASER GRADING:
MUCH LOWER EARTHWORKS (AIM: +70% LOWER)
MUCH LOWER TOPSOIL MOVEMENT
OPTIMUM SURFACE TYPES
Surface types to suit different farming systems
1 WAY – FURROW/SURFACE IRRIGATION
2 WAY – DRAINAGE FURROW/BED
4 WAY – DRAINAGE NO FURROWS
1 WAY CIRCLE -
2 WAY CIRCLE -
CENTRE PIVOT CIRCULAR FURROWS DRAINAGE
Long Section Plot
Long section plot
C7
Downslope: 0.111% to 0.333%
Long Section Plot
C7
Downslope:0.050% to 1.000%
OptiSurface - Downslope Map
C7
Runoff Velocity MapFLOW
DIRECTION
C7
Rainfall: 75mm/hr Max Velocity: 0.44m/s
Runoff Depth Map
C7
Rainfall: 75mm/hr Infiltration:0mm Max Depth: 0 170m
FLOW
DIRECTION
85HA
DRIP IRRIGATED SUGAR CANE
ON 2.4M BEDS
CASE STUDY 1 – DAVCO FIELD D4
AVERAGE SLOPE 0.25%
CASE STUDY 1 – EXISTING TOPOGRAPHY
CASE STUDY 1 – EXISTING PONDING ANALYSIS
WITH BEDS 200mm HIGH
RESULT: 25% OF THE FIELD PONDED
ESTIMATE LOSS IN PONDED AREA 75% YIELD LOSS $3,800/HA $81,000/yr
CASE STUDY 1 – PROPOSED TOPOGRAPHY
DESIGN MAIN SLOPES MIN: 0.08% MAX: 0.3% SMOOTHING: 200m/%
DESIGN CROSS SLOPES MIN: -0.5% MAX: 0.5% SMOOTHING: 200m/%
CASE STUDY 1 – CUT/FILL
AVE. CUT PER AREA: 182 m3/ha
AVERAGE CUT: 38mm FILL: 36mm
EARTHWORKS COST/HA: $330/HA FIELD COST: $30,000
LONG SECTION FOR OPTISURFACE LOOSE
LONG SECTION FOR OPTISURFACE TIGHT
LONG SECTION FOR LASER
FIELD COST: $30,000 BENEFIT: $81,000
ROI 270%/yr
PLUS OTHER BENEFITS ↑TIMELINESS ↓NITROGEN LOSS ↓WEEDS ETC
CASE STUDY 1 – RETURN ON INVESTMENT
DRYLAND GRAIN FARM, WARRA, QUEENSLAND
CASE STUDY 2 – BIDSTRUP FIELD ALOE 3
"I lost half my crop to ponding. I was ecstatic to see zero water laying in the field I Optisurfaced!" Wade Bidstrup
AREA: 117ha
YIELD MAPGreen = high yieldRed = low yield
2012 LOSS: $600/ha $70,000
CASE STUDY 2 – YIELD MAP
PHOTO
AVERAGE SLOPE 0.08%
CASE STUDY 2 – EXISTING TOPOGRAPHY
1m Fall1200m
PONDING >25mm: 45%
CASE STUDY 2 – EXISTING PONDING ANALYSIS
FOR COMPARISON TO PONDING MAP
CASE STUDY 2 – YIELD MAP
2WAY SURFACE TYPE
DESIGN SLOPES: MIN: 0.05% MAX: 0.5%
SMOOTHING: 250m/%
CASE STUDY 2 – PROPOSED TOPOGRAPHY
AVE. CUT PER AREA: 96 m3/ha
AVERAGE CUT: 17mm FILL: 18mm
EARTHWORKS COST/HA: $250/HA FIELD COST: $30,000
CASE STUDY 2 – PROPOSED CUT/FILL
FIELD COST: $30,000 2012 BENEFIT: $70,000
ROI 2012: 233% AVERAGE: ?
PLUS OTHER BENEFITS ↑TIMELINESS ↓NITROGEN LOSS ↓WEEDS ETC
CASE STUDY 2 – RETURN ON INVESTMENT
WATER IS KING WHEN IT COMES TO YIELD VARIABILITY AND HENCE PROFIT
OPTIMUM SURFACE LANDFORMING CAN HELP
HIGH ROIs ARE USUALLY ACHIEVED
SUMMARY
davcofarming.com optisurface.com