Journal of Chemistry

Research Article

High Nitrogen Fertilization of Tobacco Crop in Headwater Watershed Contaminates Subsurface and Well Waters with Nitrate

Table 2

Bulk density (Bd), total porosity (Tp), macroporosity (Ma), microporosity (Mi), and saturated hydraulic conductivity (Ks) of soil for five transects and different points in the watershed.


Transect	Position/use^**	Soil layer (m)	Bd	Tp	Ma	Mi	Ks
Transect	Position/use^**	Soil layer (m)	Mg m⁻³	m³ m⁻³			mm h⁻¹

1	1, tobacco	0.0-0.1	1.01	0.65	0.33	0.32	482
		0.1-0.2	1.04	0.60	0.27	0.33	201
		0.2-0.3	0.92	0.59	0.30	0.29	209
		0.3-0.4	1.23	0.57	0.19	0.38	—^*

1	2, tobacco	0.0-0.1	1.11	0.38	0.13	0.25	316
		0.1-0.2	1.23	0.56	0.19	0.36	461
		0.2-0.3	1.15	0.58	0.21	0.36	183
		0.3-0.4	1.19	0.56	0.20	0.36	148

1	3, tobacco	0.0-0.1	1.06	0.61	0.28	0.33	429
		0.1-0.2	1.19	0.58	0.22	0.36	449
		0.2-0.3	1.16	0.61	0.21	0.40	171

1	4, tobacco	0.0-0.1	1.22	0.57	0.14	0.43	151
		0.1-0.2	1.16	0.57	0.14	0.42	94
		0.2-0.3	1.07	0.57	0.15	0.42	315

2	1, tobacco	0.0-0.1	0.97	0.64	0.33	0.31	375
		0.1-0.2	1.33	0.58	0.25	0.34	138
		0.2-0.3	1.27	0.53	0.12	0.41	137
		0.3-0.4	1.14	0.65	0.09	0.56	554

2	2, tobacco	0.0-0.1	1.32	0.53	0.12	0.41	201
		0.1-0.2	1.26	0.53	0.15	0.38	215
		0.2-0.3	1.11	0.55	0.21	0.34	345

2	3, forest	0.0-0.1	1.02	0.53	0.29	0.24	609
		0.1-0.2	1.08	0.55	0.26	0.29	510
		0.2-0.3	1.11	0.54	0.26	0.29	564
		0.3-0.4	1.12	0.56	0.27	0.28	—^*

3	1, forest	0.0-0.1	1.14	0.58	0.17	0.42	138
		0.1-0.2	1.10	0.59	0.20	0.39	130
		0.2-0.3	1.31	0.56	0.11	0.45	104
		0.3-0.4	1.15	0.59	0.17	0.41	362

3	2, forest	0.0-0.1	1.06	0.63	0.26	0.37	321
		0.1-0.2	1.16	0.61	0.19	0.42	103
		0.2-0.3	1.26	0.54	0.10	0.44	197
		0.3-0.4	1.10	0.63	0.17	0.46	378

3	3, grassland	0.0-0.1	1.31	0.54	0.11	0.42	113
		0.1-0.2	1.31	0.57	0.16	0.41	95
		0.2-0.3	1.26	0.55	0.14	0.41	54
		0.3-0.4	1.42	0.50	0.12	0.38	112

3	4, grassland	0.0-0.1	1.21	0.56	0.09	0.47	176
		0.1-0.2	1.35	0.53	0.16	0.37	336
		0.2-0.3	1.34	0.53	0.15	0.38	47

4	1, tobacco	0.0-0.1	1.19	0.55	0.25	0.30	585
		0.1-0.2	1.08	0.55	0.26	0.29	463
		0.2-0.3	1.11	0.54	0.26	0.29	452
		0.3-0.4	1.12	0.56	0.27	0.28	451

4	2, tobacco	0.0-0.1	1.11	0.52	0.27	0.26	374
		0.1-0.2	1.18	0.51	0.27	0.25	490
		0.2-0.3	1.24	0.52	0.24	0.28	389

4	3, tobacco	0.0-0.1	1.16	0.53	0.26	0.27	447
		0.1-0.2	1.30	0.50	0.19	0.31	142
		0.2-0.3	1.23	0.51	0.24	0.27	427
		0.3-0.4	1.45	0.43	0.14	0.28	435

Mean			1.18	0.56	0.20	0.36	298

Not possible to measure due to very coarse texture. ^**Points: 1: upper slope, 2: mid slope, 3: lower slope, and 4: plateau.