For the control of the pH value of a nutrient solution for growing plants the pH value is increased by supplying nitrate nitrogen and is decreased by supplying ammonium nitrogen to the nutrient solution.
申请公布号
NO139245(B)
申请公布日期
1978.10.23
申请号
NO19760003170
申请日期
1976.09.16
申请人
SJOESTEDT, ERNST HORST SEVERIN,;NISSMO, JIM ARTHUR,
发明人
SJOESTEDT, ERNST HORST SEVERIN,;NISSMO, JIM ARTHUR,