Extent, Distribution, and Causes of Soil Acidity under Subsistence Farming System and Lime Recommendation: The Case in Wolaita, Southern Ethiopia

Table 2

Pearson’s correlation matrix between soil pH and different factors in crop lands (N = 674).

	pH	Altitude (m.a.s.l)	Slope (%)	CI no.	Al Cmol(+) (kg)	Ex. Ac Cmol (+) (kg)	FYM t (ha)	DAP (kg/ha)
Altitude	0.03^ns
Slope	0.00 ^ns	0.49
Crop intensity (CI)	−0.16	−0.02^ns	−0.13
Al	−0.67	0.05^ns	0.15	0.08
Ex. Ac	−0.58	−0.10	−0.06^ns	0.05^ns	0.63
FYM	0.37	0.03^ns	−0.05^ns	−0.23	−0.25	−0.15
DAP	−0.39	−0.14	−0.05	0.14	0.20	0.20	−0.46
Urea	−0.10	−0.14	−0.06^ns	−0.06^ns	−0.01^ns	0.01^ns	−0.17	0.42

CI = cropping intensity, Al = aluminum, Ex.Ac = exchangeable acidity, FYM = farmyard manure, DAP = Diammonium phosphate, ns = not significant, < 0.05,  < 0.01.