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Nitrogen - variable rate tips for 2026.
In light of the dramas the industry is facing. A few important points to remember if you are planning on using biomass for VR nitrogen: #jfg 🧵
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VRT Solutions
733 posts
VRT Solutions
@vrtsolutions
Aiming to help growers maximise the value and efficacy of inputs through precision farming methods and data utilisation.
Western Australia, Australia Katılım Eylül 2018
1.4K Takip Edilen1K Takipçiler
@becsta1984 A prime example of why satellite imagery needs to be micro-managed x variety/pdk/growth stage/growth habit. Vigour of varieties may be similar, but growth habits can dictate differences in ndvi. Be careful with VR N rates !
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The different growth habits of Neo (left) and Bigfoot (right) are obvious side by side. Neo has the competitive advantage for ground cover if that’s something you like in a barley. Will be interesting to see how they finish up.
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@vrtsolutions @CraigDavis_Agro @andrewdunx @BOM_au Yes, but they choose not to…
@BOM_au seems just to be a place for pigs at the trough…
Science basics are ignored…
But get funding for biggest supercomputer in the Southern Hemisphere…
There are serious questions here about their purpose and execution of that…
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I’m going to comment….
We’ve done a lot of analysis lately of @BOM_au seasonal forecasts accuracy…
It’s not good by any measure…
The only time they reach moderate accuracy is for spring rainfall at the end of August…
Watch this space for a lot more on this topic…
Jonathan Dyer@dyerjonathan
Friday Night Shot: - Autumn forecast for March-June bom.gov.au/climate/ahead/… Then chaser- Actual rainfall deciles for March-June bom.gov.au/climate/maps/r… Presented without comment.
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@Agrivetbusiness @CraigDavis_Agro @andrewdunx @BOM_au This is how AI should be used. As a calculator, not as a Google search. Sounds promising!
BTW what are the benefits of 100m investment at BOM? Shouldn't gov and GRDC money be doing this?
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@CraigDavis_Agro @andrewdunx @BOM_au Have used published relationships between SOI and spring rainfall to develop a model…
After testing that AI was doing the stats correctly, have use AI to do advanced number crunching as part of the development of the model…
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Our wind forecasting tool is good for planning the week of spraying. Colour scheme makes for easy reading.
Its a global model, so you can leverage anywhere... even Antartica.
#jfg #deeperisbetter
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Your rainfall .... variable
Your soils .... variable
Your yields .... variable
Your application rates .... blanket.
Yes it can be simpler, but does it make sense??
#jfg #deeperisbetter
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Here we have "As applied" fert data, grower challenging his VR prescription 👌
Our latest trial strip analyser tool will help growers evaluate their on-farm trials easily! Pull in "As applied" or yield data, build your strips, hit GO!
#jfg #deeperisbetter
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@farmersgrowit This chart is from 1946, and even the author wasnt certain of its accuracy. The other main issue with this chart is that it is pH H20, and most agros/farmers read it like it is pH CaCl2. 0.5 of a pH unit on average different. It also doesn't account for soil moisture content.
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Balancing Ph should be our priority over chasing nutrients.
Alyx Selsmeyer 👩🏻🌾🚜🥩🍯@AussieAlyx
Soil pH isn't just a number — it controls which nutrients your plant can actually access. Most crops want pH 5.5–7.0. Outside that range, nutrients lock up even when they're physically present in the soil. Don't throw money at the wrong solution.
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This chart is from 1946, and even the author wasnt certain of its accuracy.
The other main issue with this chart is that it is pH H20, and most agros/farmers read it like it is pH CaCl2. 0.5 of a pH unit on average different.
It also doesn't account for soil moisture content.
Alyx Selsmeyer 👩🏻🌾🚜🥩🍯@AussieAlyx
Soil pH isn't just a number — it controls which nutrients your plant can actually access. Most crops want pH 5.5–7.0. Outside that range, nutrients lock up even when they're physically present in the soil. Don't throw money at the wrong solution.
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@CropDoctor54 Can you show us a photo of the soil samples please, interested in soil type
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Soil testing, and 1st assessment of the MaxSil Trial 1 today in saline soil.
Despite 25mm of rain on the weekend, it is easy to pick the Untreated plots - particularly when looking back across the plots.
6 reps across paddock, so 🤞 there should be some handy data later on.
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$10.6 billion, and this was at last years prices 🤯
Variable rate adoption has moved to a requirement, not a luxury. Make sure you find the best methods to optimise your targets.
#jfg #deeperisbetter
VRT Solutions@vrtsolutions
Global agriculture's future leans towards doing more with less. Just 11.5% smarter use of urea alone could save farmers nearly $10.6 billion USD globally each year. $10,600,000,000 USD The data is ready, LETS GO! #jfg #deeperisbetter
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VRT Solutions retweetledi
We have made some adjustments to our plant density/seed rate calculator, with a focus on canola seed. Optimise your rates!
Free for everyone, feedback and comments welcome. #jfg #deeperisbetter
tools.vrt-solutions.com/denseedy
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Soil testing deep N on some poor EP sandy country, tips on how much N is left over?
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World leading in WA.
10cm increments, you'll notice "measured and predicted" in top left alongside the depth increment. Fantastic insight into the soil profile and where sands meet clays, moisture retention and salinity issues in a vertical plane #jfg #deeperisbetter
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VRT Solutions retweetledi
Nitrogen - variable rate tips for 2026.
In light of the dramas the industry is facing. A few important points to remember if you are planning on using biomass for VR nitrogen: #jfg 🧵
English
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@David_Agronomy Use soil maps to identify best areas to attack. This makes time/$ spend most effective, removes ambiguity especially if using contractors. Have seen $500/hr reefinators driving aimlessly around farms before...!
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Anyone got experience with a Reefinator for rock crushing new land? I imagine it very much depends on the type of rock, but can you realistically do hundreds of ha's, or are they more suited to targeting problem areas and do they need multiple passes? How many Ha's would you realistically cover in a season? Any thoughts appreciated.
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Question put to a panel of agronomists on Nitrogen decision making at seeding. Useful?
What are you doing to manage N this year?
#nitrogen
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VRT Solutions retweetledi
7. Remove or reduce saline/waterlogged areas as zones of application. This is particularly easy with EM maps or historical yield or biomass data.
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VRT Solutions retweetledi
6. If you have soil maps, even setting 2 rates (light country, heavy country) can help mitigate risk in a year like this. This can be done any number of ways.
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VRT Solutions retweetledi
5. Canola – After 5% flower, NDVI data becomes increasingly useless. However, the last 2 weeks of cabbage normally have a good correlation to yield at the end of year. Please refrain from using NDVI data on Canola once the flowers come out.
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