ACP	Acid phosphatase
ALP	Alkaline phosphatase
TC	Soil total carbon
TN	Total nitrogen
$\mathrm{N}{\mathrm{H}}_4^{+}$-N	Ammonium nitrogen
$\mathrm{N}{\mathrm{O}}_3^{-}$-N	Nitrate nitrogen
TP	Total phosphorus
AP	Available phosphorus
TK	Total potassium
AK	Available potassium
C/N ratio	Soil total carbon/total nitrogen
C/P ratio	Soil total carbon/total phosphorus
N/P ratio	Total nitrogen/total phosphorus