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Oilseed rape weed management has evolved over the last 10 years, mainly due to the challenge of establishing the crop with certainty and the introduction of more effective post-emergence broad-leaved weed herbicides. Before this development in chemistry there was a lack of flexibility - crops had to be treated early and all that was left was to hope for the best.

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Today, there's more emphasis on sustainable, environmentally friendly crop production systems. As a result, cover and catch crops are becoming a widely understood and embraced method for aiding soil health.

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With harvest just beginning, now seems a sensible time to draw breath and assess the season before harvest gets in full swing followed in short order by establishing next year's crops.

And what a season it's been. Yes, there have been weather events to talk about, especially the dry April and for some also the first half of May and most of June, but these pale in comparison to the economic impacts we've seen in the last 12 months.No more so than in my world of fertiliser, where an initial new season price for AN back in June 2021 - at 81p/kg N (£280/t) - was considered by some to be too expensive, only to then rise dramatically during the season to an eye watering £2.68/kg N (£925/t) at the peak.

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At this time of year, I'm often asked: "How much nitrogen should I apply to my milling wheat crops?" My tongue-in-cheek response to that question is often: "Tell me exactly how much your crop is going to yield and then I'll be able to give you a guide on nitrogen rates." Now, clearly it is impossible to know the exact yield you are going to achieve at this stage so a definitive answer will always be hard but even so, I believe all milling wheat growers should fully understand the impact yield has on the nitrogen requirement for their crops.

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Last year, I wrote a blog on how to increase nitrogen use efficiency (NUE) to improve your farm efficiency rating and part of this looked at the impact of nitrogen losses.Following on from this DEFRA recently announced a non-regulatory approach which outlines how to reduce ammonia emissions from any urea-based fertilisers.

To be frank, a sample bag of grain doesn't really tend to excite many of us. Why would it? It's just a sample, it's minute in comparison to the hard graft that's come before it. But then – if we really think about it – doesn't that make it quite a significant thing?

That bag of grain represents at least a year of hard work; significant investments, the challenges you've overcome and the opportunities you've taken. When you consider the efforts that have gone into creating that bag of grain you realise that, if we are to be completely honest, it all comes down to that bag. The fact is that it isn't just grain in there. It's information, data, learnings, it's proof of things that worked well and sometimes things that didn't.

The start of a new year is often when most of us traditionally think back to what has happened over the past 12 months before looking ahead at those to come.

Before Christmas, we published this news release announcing some exciting digital investments that have upgraded our variable rate nitrogen service for 2022. One of the most significant developments is the adoption of radar technology, meaning users can now access cloud-free imagery.

Maize is a high-value crop with a number of uses and so it is not surprising to see that the planted area is increasing year on year. With harvest now complete, it's a good opportunity to think about the learnings from this season as well as any steps you can take to reduce overwinter soil erosion and nutrient loss following removal of the crop.

"We're on a journey". That's what I say to my crop production customers when they see me take yet another set of tissue samples from the same fields that we started tissue testing over five years ago.

Over the years, I've formed a true partnership approach with my customers when it comes to crop nutrition. In the early days, soil analysis consisted of only measuring the most basic components: pH, phosphorous, potassium and magnesium. In addition, tissue analysis was taken sporadically here and there throughout the season.

​In the first blog of this soil management series, we're exploring why it's vital to start planning for soil management in autumn-drilled crops well in advance of planting; when the previous crop is still in the ground.

​The low levels of sulphur we see today are not a new problem. Rather, it is something we've been aware of for over 30 years; ever since the first sulphur-deficient oilseed rape crops were seen on very light soils. Over time, this deficiency has progressed and now impacts virtually all crops and soil types. By looking at the factors that influence sulphur availability, you can make informed decisions and opt for products that match your crops' sulphur demand. 

Since the rain has started to fall across the UK, I've had several people asking about the final nitrogen applications on a number of crops. Unsurprisingly, there's quite a lot to consider so we've put together a two-part blog series to help you address all of the key information.

In this first blog I've compiled some advice on final nitrogen decisions for the main arable crops, taking into account overall conditions we've seen this season and what they mean for final doses on oilseed rape, winter wheat and spring cereal crops.

If a production system experiences losses, its efficiency is going to be reduced. Often this can lead to a reduction in output too and, if losses are severe enough, even an increase to overall running costs.

If we look at this in relation to our fertiliser programmes the risks are similar, so preventing any losses can lead to some real gains. For example, by reducing the CO₂e/t of production you could improve your margins and simultaneously benefit the environment.

With April quite literally around the corner and early nitrogen doses now applied, it's an opportune time to reflect on what's happened so far this season and factor in decisions for future applications. I believe it's always sensible to constantly question the fertiliser plans and programmes made earlier in the season and it's not to say they are wrong, it's to check they are still right!

We are seeing an increased interest from growers when it comes to the use of advance micro-nutrition and biostimulants as part of their integrated approach to pushing crop performance. Given where we are in the season, we thought it would be useful to give an overview of biostimulants and their role in crop production – specifically how and when to use them. We'll also explain our BioPlan service and how taking a sequenced approach to applications can support overall performance and sustainability.

​At this stage of the season, there is a lot to think about and plan on farm.

At SOYL, we have been running an extensive precision farming research and development programme for nearly 30 years. The work is central to the value of our technology and services, and today we now possess one of the largest trial databases in the world. A significant part of this work involves trials to compare our variable rate application approach against flat rate applications.

It's one of the first questions we face from growers when discussing variable rate nitrogen (VRN) and it's understandable given sulphur is one of the major nutrients required by plants. If optimum amounts aren't available, it will have a direct impact on end yield.

As it happens, in nearly all of these conversations our recommendation to growers is to apply sulphur variably alongside their nitrogen in order to achieve optimum yields and quality. Of course, as with all nutritional decisions, some forward planning is required.

With this in mind, we're going to address some common questions to help you plan for the spring and ensure you get the maximum benefits from variably applying sulphur.

I'll admit that at first sight filling your tractor with oil and planning your nitrogen applications don't appear to have much in common but in one simple way they are very similar. Before you do both, you need to know how much you've already got in the tank or in the soil, so you know exactly how much more you need to put in.

When it comes to nitrogen applications, rates should only be decided once you have fully assessed the requirements of your crops. As well as thinking about inputs, this also means making an informed judgement on how much nitrogen will be supplied by your soils.