TERM OF THE WEEK

Calcids: [soil taxonomy] A suborder of Aridisols that have considerable Ca present (i.e., a calcic or petrocalcic horizon that has its upper boundary within 100 cm of the soil surface). Precipitation is insufficient to leach or even move the carbonates to great depths. Calcids have an aridic soil moisture regime (USDA, 1999; Appendix 1).