What type of nutrient competition do weeds primarily engage in with desirable plants?

Weeds primarily engage in resource competition with desirable plants. This competition occurs when multiple plants compete for essential resources necessary for their growth and survival, such as light, water, and nutrients. Weeds often have aggressive growth habits and can outcompete desirable plants for these limited resources, leading to reduced availability for the crops or ornamental plants.

Resource competition significantly impacts agricultural productivity and plant health, as weeds can hinder the growth of desired species by monopolizing these key resources. This principle is fundamental in understanding weed management and the importance of maintaining healthy crop plants to ensure they can effectively compete with weeds in shared environments.