Regulating N Application for Rice Yield and Sustainable Eco-Agro Development in the Upper Reaches of Yellow River Basin, China

Table 1

Properties of the anthropogenic-alluvial soil in the study site.

Soil depths (cm)	Bulk density (g·kg^−1)	Organic matter (g·kg^−1)	Total N (g·kg^−1)	Porosity (%)	Soil particle size (%)
					Clay	Silt	Sand
0–15	1.35	15.21	0.98	44.25	18.25	53.76	27.99
15–30	1.43	13.07	0.99	42.04	17.33	51.07	26.59
30–45	1.55	10.12	0.86	40.71	17.70	52.15	25.74
45–60	1.59	8.30	0.73	42.07	28.04	67.71	4.26
60–90	1.50	5.56	0.34	44.82	12.11	31.96	55.93
90–100	1.52	4.48	0.31	43.72	15.96	42.05	42.00
100–120	1.48	3.55	0.25	45.28	6.41	26.93	66.67