Sewage sludge as a source of phosphor for greenhouse horticulture?
Wagening University point out that Dutch nursery horticulture is extremely efficient . " Looking at food , we are on our way to achieving ' virtually ' zero emissions by 2027 , to match the Water Framework Directive . However , to date , little attention was pay to the other end of the chain : that which go into the greenhouse , i.e. the rootage of these nutrients . "...