Question

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

Explanation:

Excessive irrigation can lead to soil salinization. When there is too much water, it can dissolve salts in the soil and bring them to the surface. As the water evaporates, the salts are left behind, increasing soil salinity. Pesticide residue is related to pesticide use, not irrigation. Consistent disease is more about pathogen presence and plant health management. Habitat destruction is a broader environmental issue not directly caused by just excessive crop watering.

Answer:

soil salinization