Wheat: Delivering Unique Profit in your Rotation · PDF file2/17/2017 · The importance of Nitrogen and Sulphur in Wheat Production. The Role of Nitrogen in Wheat Production ......
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WHAT IS THE BREAK EVEN RATE OF APPLIED N IN WHEAT PRODUCTION?
• Trials completed over 3 years to generate Nitrogen response curves and determine MER-N
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Wheat Yields with different levels of N
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Trial Results
NITROGEN PAYS
• 23 Bu gain from 0 N to 60 N
• The same yield increase between 60 N to 90 N as there is between 90N to 120N + 6 Bu
• 2.7 Bu increase from 120 N to 150 N
•Over 60% of sites had MER-N of 150 N of higher
Nitrogen Sources
WHAT IS THE BEST SOURCE OF NITROGEN TO USE ON MY WHEAT CROP?
Nitrogen Sources
• Trials over the last number of years have shown little impact of N source on yield.
• Liquid 28% or 32% have shown a small yield increase (2.5bu/acre)
• ESN has shown no yield advantage in winter wheat but did increase protein.
• Works as part of a Nitrogen blend on hard red wheat when protein adds value
•Agrotain Plus decreased yields when N applications were delayed by weather.
• Used early26
When should I apply Nitrogen in the spring?I WANT TO IMPROVE MY YIELD WHEN SHOULD I APPLY NITROGEN?
• Crop dependent
• Planting Date Late Planting = Early N
• Winter /Tiller survival Poor W/T Survival = Early N
• Green Leaf Area Low GLA = Early N•Weather dependent
• Previous / Current / Expected Adjust to season
• Yield dependent
• Yield Goals High Yield Goal = Early N•Grower dependent
• How many applications of N
• How much total N Adjust to grower situation
Advantages of Splitting N Applications
A LOT MORE POSITIVES THAN JUST YIELD
• Reduced N loss
• Better weed control
•More Uniform Heading
• Lower lodging risk
• Lower disease risk
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Spring N applications
BEST RECOMMENDATIONS TO DRIVE YIELD
• 1st application in early April GS 30 % Total
80 lbs actual N 66.67%
• 2nd application in late April 2nd Node 33.33%
40 lbs actual N
Total Min N = 120 lbs actual N 100%
High Yield Potential Sites adjust N upwards to 150 lbs per acre and follow % guideline
In HRW save 25 lbs actual N for Flag Leaf Application
2017 N applicationsWHAT TO DO NEXT YEAR?
• 2017 Crop• Early planted/ high leaf growth/ lodging risk/ yield potential
•Management very important
• 1st application @ GS 30 (late March/Early April)•Apply 2/3 total N• 2nd application @ GS 32 (mid to late April) •Apply remainder of total N•Do NOT reduce overall total N Minimum 120lbs
Sulphur Use
SULPHUR THE 4TH MAJOR CROP NUTRIENT
Sulphur Use in Wheat
DO WE THINK ABOUT SULPHUR?
N, P and K = Wheat Production
OR
N, P and K + S = Wheat Production
Reduced atmospheric deposition of s
33
1989
Data courtesy of National Atmospheric Deposition Program/National Trends Network (http://nadp.isws.illinois.edu)
*Data represents sulfur ion concentration of
precipitation.
Sulphur Use in Wheat
WHY IS SULPHUR IMPORTANT?
• Building block of protein.
• Key ingredient in the formation of chlorophyll.
•Without adequate Sulphur, crops can not possibly reach their full potential in terms of yield or protein content.
• Sulphur promotes efficient use of Nitrogen, Phosphorus and other vital elements.
Sulphur Use in Wheat
NITROGEN AND SULPHUR
• The amount of Sulphur required is closely related to the amount of Nitrogen applied
• Sulphur deficient plants accumulate nitrogen as other compounds, (nitrate, ammonium, amides) therefore the quality of protein is reduced in such plants.
• The ratio of nitrogen to sulphur usually ranges from 10:1 to 7:1
• S improves nitrogen efficiency
•High N Crop = High S Crop
Sulphur ProductsWHAT FERTILIZER PRODUCTS CONTAIN SULPHUR AND HOW MUCH?
•Ammonium Sulfate – 24% Sulphur
• K- Mag – 21% Sulphur
•MESZ – 10% Sulphur
•Gypsum- inorganic Sulphur (calcium sulphate)
•Ammonium Thiosulfate – (Thiosol) 26% Sulphur 2.886 lbs/gal S