Environmental Sciences Europe

Table 1 Total N and P of rice-field drainage in retention ditch and adjacent stream water samples and the accumulated rainfall amount during the 6–48 h before the water samples were taken (n = 977)

From: Window phase analysis of nutrient losses from a typical rice-planting area in the Yangtze river delta region of China

	Total N (mg L⁻¹)			Total P (mg L⁻¹)
	Ditch	Stream	ΔD − S^a	Ditch	Stream	ΔD − S^a
Mean	2.11	2.36	− 0.25	0.24	0.18	0.06
Median	1.70	2.21	− 0.51	0.22	0.17	0.03
Minimum	0.31	0.48	− 0.17	0.01	0.00	− 0.86
Maximum	7.89	5.57	2.32	1.18	1.13	1.04
25% percentile	1.14	1.56	− 0.42	0.15	0.12	− 0.01
75% percentile	2.77	3.07	− 0.30	0.28	0.22	0.08

^aTotal N and P in retention ditch water minus that in the adjacent stream

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