On 4/15/2016 10:43 AM, Chris Hogg wrote:
On Fri, 15 Apr 2016 14:45:44 +0100, "Dan S. MacAbre"
wrote:
A level standard teaspoon holds 5ml, which
will be about 5g of ammonium sulphate, so three level teaspoons per
sq.metre will be roughly right.

Are you quite certain on that measurement? 5ml of _water_ weighs 5g -
but I'd be surprised if 5 ml of ammonium sulphate does.