Question

Q4. Define the following terms .
1)
Weeding. II) Biodegradable substances​

Answer 1

Weeding:-

Weeding is the process to remove out the weeds. Weeds are unwantedvplants which grown along the useful crops. Weeding is required because weeds are competitive plants as they reduce the useful crop yield by acquiring space, fertilizers and nutrients from the soil.

Biodegradable substances:-

Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion or similar processes.

Answer 2

Answer:

1. The unwanted plants which grow along with a cultivated crop are called weed. The type of weed vary from field to field,crop to crop,season to season. For Ex:Wild oat,grass, Amaranthus, chenopodium etc. The process of removing weeds from a crop field is called weeding

2. Common, everyday substances that are biodegradable include food refuse, tree leaves, and grass clippings. Many communities now encourage people to compost these materials and use them as humus (an organic-rich material in soil) for gardening

Explanation:

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