write short note on weeds
Answers
Explanation:
A weed is any plant that requires some form of action to reduce its effect on the economy, the environment, human health and amenity. Weeds are also known as invasive plants. Many plants introduced into Australia in the last 200 years are now weeds.
weeds......
Definition:
Weeds are unwanted and uncultivated plants that grow with crops and compete with crops for nutrients and can also cause crop toxification.
How can we control them???
➢Weeding is removal of weeds and is mostly done before flowering begins in crop plants.
➢It is done using trowel, harrow or weedicides.
➢Trowel is used in manual removal of weeds.
➢Ploughing/tilling of soil, before seed sowing, using plough or cultivar followed by breaking the left over soil crumps using leveller also removes the weeds.
➢Similarly, use of weedicides, the chemicals that control the growth of weeds, is also practised.
The two common weeds are Amaranth and Taraxacum officinale.
why it is important to remove weeds from the fields???
➢It is important to remove weeds from the fields because they rob soil moisture and nutrients from the crop and decrease harvest efficiencies.
➢Weeds also compete with the crop for sunlight because they are competing to survive in a limited space.
➢Weeds are actively removing nutrients from the soil to grow taller, stronger and healthier each day.
sea weeds:
➣Seaweeds are among the most potent accumulators of iodine.
➣Kelps of the Laminaria genus were identified as a major iodine source.
➣Iodine is found at low concentrations throughout the ocean waters, many types of seaweed accumulate the element in very high levels.
➣It has been suggested that seaweeds could be an important route to transfer iodine to the atmosphere.
hope it helps you
#Soloqueen❤️