Sorry it's a bit basic but........ where, when, how and why do you use lime on the allotment?
Thanks.
You will find a bit of info here; http://tinyurl.com/yf7byh and use the related links to find out more.
I hope it helps!
This may explain it ..
http://www.rhs.org.uk/advice/profiles1104/limingsoils.asp
Or if you want to read a more in depth article on liming try this one ...
http://www.aglime.org.uk/technical17.htm
Cheers ..Jim
If ground/soil has that green tinge on top of it, I say the soil is sour and always lime it, then plant brassica's in it the following spring. I never manure and lime.
Chloe