drip fertilizer irrigation
irrigation water and nitrogen fertilizer
Paste irrigation fertilizer
~(15)N labelled nitrogen fertilizer
15N labelled nitrogen fertilizer
aftereffect of nitrogen fertilizer
amide nitrogen fertilizer
ammoniacal nitrogen fertilizer
ammonium nitrogen fertilizer
Amount of nitrogen fertilizer
Amount of nitrogen fertilizer applied
Application mode of nitrogen fertilizer
Application of Nitrogen fertilizer
application technology of nitrogen fertilizer
application timing of nitrogen fertilizer
available nitrogen fertilizer
base-tillering nitrogen fertilizer
biological nitrogen fertilizer