The biggest advantage for us is that the quarry is an island in the otherwise acidic sea of ​​the surrounding soil. Which makes it worse for spreading to the surrounding vegetation, but if it weren't for that, we wouldn't have to set up the experiments at all, because cocklebur wouldn't grow in our quarry. Fortunately, this is not the case, so now I can happily analyse how our cockle develops and yields.
The amount of grown cockle plants is a little less cheerful. We don't really have deep yellow squares and a few flowering plants is a win for us even though we have sown a lot of seeds.
And why is that so? One of the reasons that we have probably all noticed in recent years is the drought. In the experiment, it showed that the seeds were waiting for suitable conditions to germinate. Some did not germinate at all and others with delay.
The second reason is purely statistical. Chance and various other sub-influences play a big role in our number of repetitions, so our results are good even if it doesn't look like it at first glance. The photos were provided by Ing. Kamila Botkova.