Spatial Variability of Physical Soil Quality Index of an Agricultural Field

Table 2

Transformation and combination of physical soil quality indicators data to form a soil quality index (SQI_P). Each soil physical quality indicator is transformed into 1 if that indicator meets the threshold ranges specified in Table 1, otherwise is denoted 0. Similarly, specific SQI_P was transformed into 1 or 0 by evaluating how many measured physical soil quality parameters satisfied the threshold ranges of soil quality.

Location		Measured values					Transformed values					Combined indicator values
𝑋	𝑌	Clay	Bulk density	Porosity	𝐾𝑆^‡	MWD^#	Clay	Bulk density	Porosity	𝐾𝑆^‡	MWD^#	SQIP; (2 of 5)	SQIP; (3 of 5)	SQIP; (4 of 5)
10	10	48.16	1.16	50.85	24.46	1.44	0	0	1	1	1	1	1	0
10	20	42.81	1.25	46.81	4.44	0.63	0	0	0	0	0	0	0	0
10	30	45.6	1.23	44.30	1.00	0.56	0	0	0	0	0	0	0	0
10	40	45.60	1.22	48.30	2.98	0.53	0	0	0	0	0	0	0	0
10	50	45.61	1.13	52.13	7.76	0.7	0	0	1	0	0	0	0	0
10	60	61.14	1.19	49.36	2.09	1.96	0	0	0	0	1	0	0	0
10	70	50.94	1.1	53.19	9.10	0.84	0	1	1	1	0	1	1	0
10	80	53.22	1.27	45.96	25.82	0.92	0	0	0	1	0	0	0	0
10	90	47.88	1.25	46.81	7.13	0.86	0	0	0	0	0	0	0	0
10	100	50.73	1.31	44.56	5.98	1.99	0	0	0	0	1	0	0	0

‡Saturated hydraulic conductivity; ^#mean weight diameter.