Weed control is important in agriculture to prevent weeds from competing with crops and desired plants for space, sunlight, water and nutrients. Techniques for weed control include manual removal with tools, tilling of soil with cultivators, applying mulch, using heat to kill weeds, burning, and applying herbicides. Weeds can reduce crop yields if left uncontrolled and some weed species are invasive, noxious or interfere with livestock. The impact of weed competition depends on conditions, seasons and the type of weed and crop species involved.

1. Weed control
Weed control is the organic segment of bug control, which endeavors to
stop weeds, particularly harmful weeds, from rivaling wanted vegetation
including tamed plants and domesticated animals, and in common
settings forestalling non local species contending with local species.
Weed control is significant in farming. Techniques incorporate hand
development with tools, fueled development with cultivators, covering
with mulch, deadly withering with high warmth, consuming, and
substance control with herbicides (weed executioners).
Weeds rival profitable yields or field, they can be noxious, offensive,
produce burrs, thistles or in any case meddle with the utilization and the
board of attractive plants by defiling harvests or meddling with
domesticated animals.
Weeds rival crops for space, supplements, water and light. Littler, more
slow developing seedlings are more helpless than those that are bigger
and more fiery. Onions are one of the most powerless, on the grounds
that they are delayed to develop and create thin, upstanding
stems[citation needed]. By contrast wide beans produce huge seedlings
and endure far less impacts other than during times of water deficiency
at the pivotal time when the cases are filling out[citation needed].
Relocated harvests brought up in sterile soil or preparing manure
increase a head begin once again developing weeds.
Weeds likewise fluctuate in their serious capacities as per conditions
and season. Tall-developing vivacious weeds, for example, fat hen
(Chenopodium collection) can have the most articulated consequences
for adjoining crops, in spite of the fact that seedlings of fat hen that show
up in pre-fall produce just little plants. Chickweed (Stellaria media), a low
developing plant, can cheerfully exist together with a tall harvest
throughout the late spring, yet plants that have overwintered will develop
quickly in late-winter and may overwhelm yields, for example, onions or
spring greens.
The nearness of weeds doesn't really imply that they are harming a
harvest, particularly during the early development stages when the two
weeds and yields can develop without impedance. Nonetheless, as
development continues they each start to require more noteworthy
measures of water and supplements. Appraisals propose that weed and
harvest can coincide amicably for around three weeks before rivalry gets
huge. One investigation found that after rivalry had begun, the last yield
of onion bulbs was diminished at nearly 4% every day