Table 2.

Correlation coefficient between the soil cations (H⁺ and aluminum) and soil nutrients.

Soil Nutrient Factors	pH	Exchangeable Acidity	Hydrolytic Acidity	Exchangeable Aluminum
Soil organic matter	−0.0703 ns	−0.0263 ns	0.0280 ns	−0.0450 ns
Total carbon	−0.1536 ns	−0.0729 ns	0.1094 ns	−0.1223 Ns
Available phosphorus	0.4343 ns	−0.5018 *	−0.3414 ns	−0.5052 *
Total phosphorus	0.7490 ***	−0.6509 ***	−0.5147 *	−0.6234 **
Available nitrogen	0.2155 ns	−0.1789 ns	−0.1282 ns	−0.2141 ns
Total nitrogen	0.3626 *	−0.5047 *	−0.3723 ns	−0.4928 *
Total potassium	0.0929 ns	−0.1059 ns	0.0294 ns	−0.0225 ns
Total iron	−0.009 ns	0.0986 ns	0.0298 ns	0.2353 ns
Total calcium	0.344 ns	−0.3218 ns	−0.3622 ns	−0.3125 ns

The notes for the asterisks and the abbreviation ns in the table: * significant level at 0.05, ** significant level at 0.01, *** significant level at 0.001, and ns: no significance.