update
Just to clarify things I do have a grade 2 Ag rating put into practice briefly about 20 years ago and to save digging into the books to refresh my memory on a formula I was hardly conversant with I thought this forum might help with a quick answer.
To the Dear Sir with the innuendo about my crop if you know my name I would have hoped you would know also the high ethical standards by which I conduct my life, reflected by my bank balance i might add and know that crops are not in my experience.
On the other hand if you are a mate of mine just being a smart a@#$e pm me and we will swap insults.
cheers