Table 5.

Effects of N fertilization practice on urea-¹⁵N recovery in rice plants and ¹⁵N use efficiency at maturity.

Treatment	Urea-15N recovery (%)				15NRE (%)	NRE (%)
	Grain	Straw	Root	Soil (0–20 cm)	Total
NBP	9.6 b	3.2 b	0.17 a	14.2 b	27.2 c	12.8 c	38.7 c
NDP	29.0 ab	8.2 ab	0.55 a	22.7 a	60.4 b	37.2 b	76.9 b
NPKDP	43.7 a	10.5 a	0.61 a	15.9 ab	70.7 a	54.2 a	86.5 a

Different letters means significant difference at the 0.05 probability level according to Duncan’s multiple comparison test.