Loosing Our Biggest Asset-or not?

LiDAR Image of the Carrent Catchment - source Environment Agency

Every day is a school day and so we have to keep learning about our environment and how we interact with our natural surroundings.  We are just starting to develop a local group of farmers, with help from Gloucestershire FWAG called the 'Carrant Catchment Restoration Project', with the aim of increasing water quality and biodiversity in the local stream that originates around Bredon Hill.  One of the most staggering bits of information came from our local Environment Agency and uses LiDAR information to look at the erosion risk from farmland.  At first glance this sea of red shows high risk areas all over he top of the hill!  Quite alarming.  We then have to start looking at land use, and some of the red areas are taken out of the equation with woodland and the grassland.  We mustn't ignore the grassland-as significant soil erosion can stem from overgrazed or compacted grassland, but it's the arable area of the hill that is by far and above the largest proportion and so poses the largest risk of erosion.

Surface runoff is caused when the field is at water capacity or when compaction is present, both cause the next rainfall to run downhill taking soil particles with it.  These particles are potentially carrying fertiliser and pesticides off down into the nearest water coarse, causing the very typical brown water often seen after heavy rainfall events.

Winter Barley Rooting Structure on Bredon Hill

Our new system of zero tillage (no till) crop farming is the best way to stop erosion from happening on our fields.  The system means that the soil is not disturbed so it can structure itself to allow more water to enter it, reducing runoff.  By leaving crop residue or by growing cover crops the soil surface is protected form rain droplets, stopping surface compaction from happening.  By not cultivating the land we are not burning the organic content of the fields, reducing green house gas emissions.  From a water storage position the organic matter acts like a sponge so the more we have, the more water we can store before it runs off through the soil profile into the groundwater.  The picture above is from a field that has been in zero tillage for 4 years and is really starting to come to life in many ways.  The crop residue is present and under that a crumbly mixture of roots and soil particles attached to the roots of the plants.  This is just the start of what I hope our soils will turn into over time.

Looking Underground for Long Term Solutions

I had a really nice comment, via a good friend, from a local retired farmer. "Bredon Hill is looking very green".  Now I am not sure it was meant as a complement or a statement but I shall take it as the former as that is what we are trying to achieve.  We need to cover up, indeed don't farm naked, to protector our biggest and most valuable asset, our soil.

Buckwheat Companion Crop with Oilseed Rape

We have had a really super summer and autumn, after the damp and cloudy June, we've had good sunlight, warm temperatures and periodic rain events.  It reminds me of the summers I can remember growing up as a child, endless days of sunshine.  Harvest ran like a dream, our new header performing very well and crops nice and dry, although the yields were disappointing they were on par with our neighbours, which with a completely new system is very encouraging indeed.

The cover crops we have planted have all grown very well indeed and are now producing many environmental benefits.  The most obvious to see is the huge array of flowers producing pollen and nectar for insects to feed on.  During the sunny afternoons these fields are filled with bees.  There is so much insect feed available that a local bee keeper has brought 6 hives down for his bees to feed on the flowering buckwheat.

Buckwheat Root, Root Hairs and Mycorrhizal Fungi

There is also a lot going on underground that we are unable to see, unable to really understand, but we are starting to explore the dark world of the plant and fungal interaction.  The fact that we have plants growing in our soils means that they are capturing every bit of sunshine and turning it into organic matter.  They are growing roots, root hairs, leaves, stems and even fruit.  All of this is capturing carbon from the atmosphere and locking it up in the soil.  The roots are pushing into the soil, helping to repair soil structure so that when we get heavy rains it will infiltrate the soil rather than run off.  The leaves will intercept rain droplets and stop them compacting the soil surface.  The roots are feeding the fungal and bacterial populations in the soil, helping to build a web of different colonies able to scavenge for nutrients as the plants need them.  As these populations grow, they excrete waste which the plants can use.  The waste has a high level of nitrogen in it, which is a key nutrient for our crops, so we can in time use less natural resources in the form of fertiliser.

Cross Slot Drill Planting Wheat into Buckwheat Covercrop

One of the key aspects of making this system work is by having a planting machine (drill) that can cut through these heavy crop and cover crop residues to get he seeds into the soil with good seed placement.  The fact that we can also add starter fertiliser and any slug control products at the same time makes this a very efficient system.  Its better for the environment, better for our productivity and our profitability.  In an uncertain; post Brexit world, where farm support will be reduced, reducing costs and reliance on purchased inputs will be essential to arable farming survival but I believe we are developing a system that will enable us to achieve this.

Agrii Agronomy Day

On the 1st May I had a really interesting agronomy meeting (day) with Agrii down near Marlborough.  It consisted of a morning session in a rather chilly grainstore and an afternoon session outside in the first bit of sunshine I had seen for nearly a month!.  I met up and had a good conversation with Stuart Alexander from Soilquest (part of Agrii ) all about using precision farming techniques to really target nutrient application.  The Soilquest system works in a slightly different way to that of SOYL who's technology we have been using since 2006 but ultimately using expensive nutrients targeted in the correct areas of the field has to worth while both from a financial and environmental aspect.

Stuart had some really great pictures demonstrating how soil changes with a field.  As farmers we have been joining fields together to get more efficiencies, to use bigger and bigger machinery.  Many of the old field divisions, such as hedges or walls, were put in place where different soil types naturally occurred and those different fields needed different applications and handling and here we are putting them all back into one area.  Now we can try and manage those smaller parcels of soil differently within the same field, which can only lead to better yields with targeted management.  However, and this is where precision farming can be a loose arrangement; if we have a fertiliser spreader or a sprayer at 24, 36 or even over 40m wide then that is currently as precise on these inputs as we can get.  When using narrower seed drills (ours is 6m) that I feel is the way to start the process off by trying to create a more even establishment of plants at the start of the year.

In addition to the Soilquest team Dr Peter Gladders was there talking about disease levels in this years Oilseed Rape crops, especially sclerotinia, which at the time were not very threatening, (cooler night-time temperatures stopping the sporilation). He also spoke about the long flowering period that we may have with  these lower temperatures that could expose the crop to risk for a longer period of time, if the weather warms up.  Therefore timings of fungicide are crucial this year as there is no 'kickback' control on sclerotinia.  Verticillium wilt was also mentioned where there is potential to build up the fungi in the soil, with close rotations of rape and certain varieties, (such as Excalibur) increasing it's occurrence from 6% of the UK's arable fields. I will be out spotting the disease later in the year, usually about symptoms start appearing as the crop is getting ready for dessication.

Finally I found listening to Phillip Marr very interesting, he spoke about the flowers being formed in the plant in mid winter (say dec on a conventionally timed crop).  at this point the crop turns from being vegetative to being reproductive and new main root development stops.  All that happens through the spring and summer is the root cells increase in size giving an appearance of growth, so root development shouldn't be hindered in the autumn with poor cultivations or poor fertility, everything is linked together and can therefore only be managed with Integrated Farm Management it's where autumn metconazole has a great role to play.