Is that calculated usage based on manure aplied in resent years
or just on bagged usage
When we got high yield in the 1980s with 120 kg n out of the bag but 250 kg from muck 4 plus tonnes of 13.5% protein wheat per acreBagged. Suppose you can make an allowence for residual - I'll consider current guesses to be based on what I consider the usual UK arable basis IE 20kg smn at the beginning of a crop and after the offtake.
The water, along with an excellent growing climate (like where Tim lammyman etc are in the U.K.) must make these fairly nitrogen efficient crops?I'm used to applying 300kg from a bag. But with yields to go with it. I expect his irrigation would drop his nitrogen per ton of grain to lower than we would get here. 30kg per ton of 13 percent milling. 25kg for 11.4 feed.