How do weeds compete with crop plant for resources?

Answer 1

Weeds steal the nutrients from the soil that the crops need. Some weeds grow so thick that they choke out the crop. If the weeds get tall enough, they will shade out the crops so that they can not get the sunlight they need.

Answer 2

Air space, heat, light, moisture, nutrients, and space are what weeds compete for. They generally do quite well in doing so since they can colonize degraded or disturbed sites which are too high or low in moisture- and nutrient-retention for edibles and ornamentals to thrive.

Answer 3

Quick intake of moisture and nutrients, rapid expansion into horizontal and vertical spaces, and tolerance of low living standards are ways whereby weeds compete with crops for resources. Weeds manage to flourish in high- and low-moisture and nutrient situations on disturbed soils. They spread in more than one way -- by rhizomes, roots, seeds, and stolons -- so that they assert first claims to sub-surface and surface moisture and nutrients.

Answer 4

they compete with the crop plants for sunlight, water, room and nutrients in the soil