Soil – checking the foundations
by Rob
“The soil is the great connector of lives, the source and destination of all”
Wendell Berry, The Unsettling of America: Culture and Agriculture
This week we finally moved onto Hogchester Farmland. The very next day we began the wild flower meadows project. Dorset Wildlife Trust conservationist Nick Grey and Soil Scientist Mark Kibblewhite (PhD) came to take soil samples and dig pits to assess the soil depth and type and quality.
![IMG_6856[1]](https://hogchester.wordpress.com/wp-content/uploads/2016/04/img_68561.jpg?w=328&h=437)
Mark KibbleWhite (left) and Nick Grey (right)
The principal tools of a soil scientist are familiar to all – a spade and pocket knife. But the world those simple tools revel is the most complex biological ecosystem on the planet bar none. The soil beneath our feet is poorly understood even today and our investigative tools seemed rudimentary. Never-the-less, in a couple of hours I leant simple techniques for assessing clay and sand content. If it rolls easily into a turd and holds its shape you have a good amount of clay, if you wet it, smooth it and it shines then you have a lot of clay. Sand can be felt by rubbing through the finger tips but like a blind person trying to read brail for the first time I found that information was hard to grasp. We investigated top soil depth, stone types, compaction, drainage and root depth. We also took a tradition ‘W’ series of soils samples to be sent away for biochemical analysis. This will give an indication of fertility and pH.
![IMG_5606](https://hogchester.wordpress.com/wp-content/uploads/2016/04/img_5606.jpg?w=500)
photo taken last summer of the view across the two fields
The soil in our two fields is all of a type with some degree of variation between our pits due to land slippage and the gentle movement of the topsoil over time. The soil is ‘young’ showing no stratification typical of more mature sites. It is a clay sandy loamy soil or some other combination of those words (forgive me Mike), and the depth varies from 15cm to over 30cm. There is some compaction due to sheep grazing over 10s of years. The drainage varied a lot from poor at the bottom of the hill to pretty good at the top. This was reflected in a variation in the sword from top to bottom. Mike’s assessment was that some of the soil would be ideal for tress, some for meadows and some was good enough to grow some potatoes in! – but that is not our mission.
It seems we can stick with our plan to sow these two fields as meadows this year. The basic analysis shows that there is a good amount of variations across the meadows that gives rise to a wide diversity of micro habitats. We will sow a broad range of seed and leave nature to sort out what should be growing where. The meadows, if carefully managed, will also ease the compaction problem as new roots open up the soil. “let the biology do that hard work for you”.
A big thank you Nick and Mike. Your enthusiasm is infectious and I learnt a great deal.