Day 5 - all done

With three banks and fields to sample today and a lengthy drive home I got up at 6 a.m. to make sure I was at Sennowe Park prompt at 7 a.m. This entailed a cold breakfast of toast which didn't put me in the best of moods. I got to Sennowe Park for about 7.15 am but then was unable to get started until after 8. Whilst I waited it started to rain. So not a great start but the clouds had a silver lining because by the time I was able to start the rain had stopped and it turned into a sunny day. Two of the three banks turned out to be the same age so I only sampled one of those which also meant an early finish enabling me to get home at a reasonable hour though in truth three banks of different ages would have been good.

A rather diffuse bank, c. 20 years old

The final bank of the tour, c. 26 years old

The first bank was rather diffuse and it was tricky to work out where the bank began and ended - it sort of merged into the uncultivated strip next to it. The second was a bit better though had lots of brambles on it which was a nuisance.

The soil was far sandier than the previous days but still had a little flint in it. It was also deeper and ended in a clay rich layer rather than the previous three days chalk - nice for a change.

Flinty not chalky surface

A good auger's worth of soil without hitting parent material

Orange tinted, clayey stuff from the bottom of a core

And that was it - a drive back to York with more Radio 4. In total over 700 miles of driving and a grand total of 216 samples which now I just have to process....

Day 4 - breakfast mysteries and banks in the sun

A lovely days sampling today in the sunshine despite the predicted rain but the day started with a mystery.....

Gregg's porridge with a serving suggestion of dry oat flakes!

Fond as I am of Greggs, how can a picture of some dry porridge oats be a sensible "serving suggestion" for porridge?

I tried not to let this perplexing question delay my sampling too much and was soon back in the field. only two banks today, the second in particular was a delight with buzzards overhead in the clear blue sky.

2005 bank - lovely blue sky

2015 bank - sky looks a bit ominous but soon it was sunny

The soil was still shallow and chalky, I have high hopes of the Norfolk sampling tomorrow at Sennowe Park for some less stony, deeper soils.

A final shot of chalk bespeckled soil

It was a four to five hour drive from Cranbourne up to Norfolk through some very unpleasant rain (the thick stuff you have to strain to see through, I was very pleased to be in the car and not sampling) but the M25 was moving quite well and I got to my hotel (a Best Western this time, the room is boiling due to some hot water pipes!) at around 6 pm.  It's another early start tomorrow so I can be at the estate office for about 7 am then just 3 banks and fields to sample before heading home!

Day 3 - the banks keep coming

Another busy day sampling - three more banks done, this time dating from 2017, 2013 and 2011.

The 2017 bank

The 2013 beetle bank

The 2011 bank

Again the soils were shallow with chalk parent material at depths somewhere between 20 and 30 cm.

Chalk at the bottom of the auger from the 2017 bank

2013 samples with depth (and chalk) increasing left to right

The last bank was about 2 km from where I parked so this was an excellent opportunity to work out how to carry the auger, the corer, the GPS system and my bucket over distance - I'll need to do that again tomorrow for a 2005 bank, again at Cranboune. Despite the walk I was finished by 1700 and back to the Ringwood Travel lodge where I chanced my arm and got some additional complementary tea bags (that's four I've had now over 3 days!) and my shower gel dispenser topped up. The pub over the road (The St Leonard) is OK for food and has decent beer and you can get breakfast at Greggs next door to the Travel lodge (porridge for me!) but it has to be said that I won't be rushing back to the Travel lodge (though to be fair the bed is comfy and the shower is hot).

Day 2 of the Beetle Bank blitz

Another early start this morning but given the level of amenities at Ringwood Travel Lodge I am at least getting early nights!

Field kit present and correct for another morning

First stop was Woodyates farm - two banks here, one about 22 years old, the second created last year.

Bank 1 - a venerable c. 22 years old

Bank 2 - produced last year following the line of some power cables

Both these banks are quite different from yesterdays (and look at the Pentridge one, last stop today as well) which highlights I guess what a simple concept Beetle banks are - they really are just a bank of soil that is left uncultivated. They are produced by farmers turning the ploughed top soil onto the line where they want the bank. This makes them easy to produce but might complicate comparing how the carbon builds up over time between banks.

Another contrast with yesterday was that these soils are quite chalky - you can see the creamy coloured bits of stone in the photos above (and below).

You can see the white chalk at the bottom of the "soil sample" on the left and the brown colour of the overlying soil on the right

Normally soils form through a combination of silicate minerals in rock breaking down and organic matter accumulating. Chalk bedrock is largely calcium carbonate, it doesn't have many silicate minerals to break down; typically the chalk just dissolves leaving very few soil minerals behind, so chalk soils are often very thin. The good news is that this means you don't have to sample very deep to get to the parent mineral material, the bad news is that you can spend a lot of time trying to core through rock!

So the shallower samples vs trying to core through rock kind of cancelled each other out and I didn't make really quick time. I did however, have time for a final field at Pentridge farm - again this was a "new beetle bank" and was on my list for tomorrow so I got one ahead.

The bank was a bit of a monster - the photo doesn't really do it justice, far higher than the others I've seen so far, with wide strips on either side that weren't cultivated.

The Pentridge beetle bank

Again, you can see the chalk quite clearly and the soils in the fields were rather shallow. I managed to finish just before the light gave out on me (the last time I did torch lit field work was with Stuart Black and Tracy Buckby in the Rio Tinto about 20 years ago I can't recommend it).

You can tell that it's getting dark (despite the camera's best efforts) as the lights on the GPS base station and clearly visible.

The drizzle started again and I packed up in the dark. Tomorrow's weather looks OK and it is off to Cranbourne for two days of banks.

Beetle banks tour 2020

So, after a brief hiatus of a mere 4 ish years my term as Head of Department has finished and I'm safe to blog again (I'd stopped previously for fear of saying something I'd regret later!).

2020 begins with a tour of Beetle banks - these are strips of grassed soil in arable fields designed to encourage beetles, the clue is in the name! The beetles help control pests in the arable fields. However as the banks are not ploughed they should accumulate carbon as well. So, working with Dr Alistair Leake of the Allerton project we've identified Beetle banks of various ages and are now sampling them. This should allow us to determine the rate of carbon accumulation in the banks and demonstrate another valuable service they provide.

The first beetle bank - a relatively new one planted c. 10 years ago.

After an early start (0500) I got to the Allerton project just as it was getting light and spent a happy half day sampling a couple of banks with Alistair. Then it was back in the car and a drive down south to Ringwood where I'll be sampling banks at a couple of farms over the next several days then, on Thursday evening, it is back up to Norfolk for a final set of banks on Friday then home to York.

Bank 2 - this one is about 25 years old and is far better established

Alistair in action - he was a bit of a pro when it came to the sampling, far faster than me!