Final answer:
Podsolization is the process responsible for reduced fertility in moist acidic soils.
Step-by-step explanation:
The reduced fertility occurring in moist acidic soils is known as podsolization. This process is distinct from other soil processes such as cation exchange, which involves the soil's ability to hold onto and exchange cations (positively charged ions) and is an important factor in a soil's fertility.
Processes like oxidization and laterization relate to other specific soil characteristics and weathering processes, but do not directly describe the phenomenon of reduced fertility in moist acidic soils that podsolization does.