Soil Quality and Water Redistribution Influences on Plant Production over Low Hillslopes on Reclaimed Mined Land

Table 1

Soil properties at experimental reclamation sites. AWC, available water content; EC, electrical conductivity; SAR, sodium adsorption ratio; SOC, soil organic carbon.

	Zap reclamation site					Stanton reclamation site
	Topsoil	Subsoil A	Subsoil B	Subsoil C	Minespoil	Topsoil	Subsoil	Minespoil
Sand, g kg^−1	410	82	315	679	80	526	246	74
Silt, g kg^−1	349	443	420	187	482	341	425	563
Clay, g kg^−1	241	475	265	134	438	133	329	363
Texture, USDA system	Loam	Silty clay	Clay loam	Sandy loam	Silty clay	Sandy loam	Clay loam	Silty clay loam
AWC, kg kg^−1	0.174	0.147	0.149	0.096	0.128	0.190	0.157	0.157
Bulk density, g cm^−3	1.211	1.251	1.331	1.448	1.353	1.279	1.279	1.340
, dS m^−1	1.32	4.76	2.29	0.79	5.86	0.60	2.99	3.05
SAR, (mol m^−3)^1/2	4.86	7.67	6.77	5.46	17.30	3.47	9.96	16.40
Saturation%	41.2	60.1	48.5	27.4	99.6	41.0	62.7	112.4
	7.16	7.36	7.73	7.07	7.54	7.37	7.91	7.95
SOC, g kg^−1	14.3	9.7	7.1	7.2	8.5	15.6	8.1	9.5
Total , g kg^−1	1.16	0.80	0.60	0.69	0.71	1.3	0.7	0.3
available P, mg kg^−1	9.2	11.4	3.6	6.7	7.1	8.7	4.0	4.9

that EC was on 1 : 1 gravimetric basis and pH was from saturation extracts. may be elevated to some greater or lesser degree by presence of leonardite (partially oxidized lignite).