HOME

HELP

FEEDBACK

QUICK SEARCH:

	Author:		Keyword(s):
Year:		Vol:		Page:

	Help viewing high resolution images
	Return to article

Click on image to view larger version.

Fig. 4. Distribution of nitrate (NO₃)–N in 0- to 200-cm soil profile before winter wheat planting in 1999/2000 and after winter wheat and summer maize harvest from 1999 to 2003. No N, Con. N and Opt. N represent no N fertilization, conventional N fertilization, and optimized N fertilization treatment, respectively.