Effect of Saturated Near Surface on Nitrate and Ammonia Nitrogen Losses in Surface Runoff at the Loess Soil Hillslope

Table 1

List of experiment treatments.

Soil moisture treatment	Fertilizer treatment	Fertilizer inputs
		N
		Kg hm^−2
Saturation (SA)	Control (NF)	0
	Low input (LF)	120
	High input (HF)	240
Free Drainage (FD)	NF	0
	LF	120
	HF	240

NF, no fertilizer input; LF, low fertilizer treatment/input (120 kg N ha⁻¹); HF, high fertilizer treatment/input (240 kg N ha⁻¹). FD, free drainage hydraulic gradient; SA, saturated hydraulic gradient.