Question

what can excessive irrigation (or watering of crops) result in?
soil salinization
pesticide residue
consistent disease
habitat destruction

Explanation:

Excessive irrigation can cause water - logging. As water evaporates, salts are left behind in the soil, leading to soil salinization. Pesticide residue is related to pesticide use, consistent disease may be due to pathogens and poor plant health management, and habitat destruction is more about land - use changes and deforestation etc.

Answer:

soil salinization