Parameters	Nutrient supply		Placement		Nutrient supply × placement
Parameters	F-value	P-value	F-value	P-value	F-value	P-value
Grain yield	12.3	0.001	17.2	0.001	3.9	0.04
Grain Pcon	6.3	0.01	1.1	0.32	4.6	0.03
Straw Pcon	0.8	0.48	2	0.18	0.2	0.85
Grain Ncon	1.9	0.18	5.7	0.03	0.97	0.4
Straw Ncon	10.4	0.001	1.2	0.29	2.1	0.16
Total P uptake	10.6	0.001	14.9	0.002	4.3	0.03
Total N uptake	10.9	0.001	16	0.001	0.8	0.46
Root length density	46.3	<0.001	132.5	<0.001	1.7	0.22
Root mass density	12.9	0.001	221.1	0	1.7	0.21
Root/shoot ratio	17.4	0	0.6	0.44	5.4	0.02

Table 1 : Two-way analysis of variance tests for significant effects of nutrient supply, nutrient placement, and their interaction on rice grain yield, grain and straw N and P concentrations (con), aboveground N and P uptake, root length, root mass density, and root/shoot dry weight ratio.

Placement (cm)	Nutrient supply	Grain Pcon (mg g^-1)	Straw Pcon (mg g^-1)	Total P uptake (mg ^-1)
3	LN	2.27 b	0.88 a	68 b
	LP	2.48 b	0.97 a	73 b
	LNP	2.95 a	0.92 a	103 a
	UNP	2.53 b	0.82 a	73 b
10	LN	2.52 a	0.70 a	69 ab
	LP	2.35 a	0.75 a	54 b
	LNP	2.78 a	0.92 a	77 a
	UNP	2.53 a	0.82 a	73 a

Placement (cm)	Nutrient supply	Grain Ncon (mg g^-1)	Straw Ncon (mg g^-1)	Total N uptake (g^-1)
3	LN	15.7 a	13.8 a	0.65 ab
	LP	16.0 a	10.5 bc	0.57 b
	LNP	16.9 a	11.2 b	0.72 a
	UNP	16.5 a	9.7 c	0.58 b
10	LN	16.5 a	11.9 a	0.58 a
	LP	17.8 a	10.2 bc	0.45 b
	LNP	16.9 ab	11.3 ab	0.60 a
	UNP	16.5 a	9.7 c	0.58 a

Placement (cm)	Nutrient supply	Root length density (cm cm^-3)	Root mass density (mg cm^-3)
3	LN	17.6 a	1.3 a
	LP	9.5 b	0.9 b
	LNP	15.6 a	0.9 b
	UNP	6.6 c	0.8 b
10	LN	10.3 a	0.4 a
	LP	3.6 b	0.2 b
	LNP	8.7 a	0.3 a
	UNP	2.2 b	0.1 b

Tables at a glance

Figures at a glance