2.2.2. Soil
Soil samples were taken from depths of 0–20 cm from each pot at the end of the second experiment,
and the samples were analyzed for chemical properties with the soil analysis methods of the American
Society of Agronomy (ASA) and Soil Science Society of America (SSSA) [27]. The chemical analyses
included pH, electrical conductivity of the saturated-soil extract (ECe), cation exchange capacity (CEC),
T-N, T-P, phosphorus pentoxide (P2O5), organic matter (OM) as well as exchangeable cations including
Ca2+, Mg2+, Na+
, and K+