by Ed Tripp, University of Nottingham
All 514 seedlings have been harvested.
It took a good week or so to separate all the seedlings from the soil, dry them in an oven to remove the water, and then to weigh them.
It looks like the initial results are OK; there is some relationship between plant size and nitrogen deposition. However, there are still a great many factors that need to be included in the analysis which could explain the differences in plant size.
These include the vegetation survey data, plant chemistry, the size of heathlands, management strategies, and many others.
Currently I am analysing the plants for nitrogen and phosphorus content, both of which indicate soil fertility.
A new video coming soon....