Nitrogen fertilizer: retrospect and prospect.
Frink
C R
CR
The Connecticut Agricultural Experiment Station, New Haven, CT 06504-1106, USA. charles.fink@po.state.ct.us
Waggoner
P E
PE
Ausubel
J H
JH
D017753:Ecosystem; D005308:Fertilizers / Q000706:statistics & numerical data; D005523:Food Supply; D006801:Humans; D009584:Nitrogen; D009586:Nitrogen Fixation; D011157:Population Dynamics; D014481:United States