Table 1.

Effects of local nitrogen application (NN, no nitrogen; HN, high nitrogen) on dry weight (DW) of the shoot and root of Zea mays plants

	DW Shoot (g)	DW Seminal (g)	DW Crown (g)
	0.730±0.06
NN		0.032±0.01*	0.100±0.01***
HN		0.072±0.01	0.399±0.04

Plants were grown without N for 15 d after which half of the root system received 17mM nitrogen. Values are means ±SE (n=18). Asterisks indicate significance between LN and HN (paired t-test: ***, P<0.001; **, P<0.01; *, P<0.05; (*), P<0.1; NS, P<1.0).