Please answer 3&4 fasst
Answers
Explanation:
weeds are unwanted plant that grow along with other plants and take there nutrients. we control them by using weediesides .
giving water to crop in the interval of time is called irrigation.
two method of irrigation which conserve water are
1.sprinkler system
An irrigation sprinkler is a device used to irrigate agricultural crops, lawns, landscapes, golf courses, and other areas. They are also used for cooling and for the control of airborne dust. Sprinkler irrigation is the method of applying water in a controlled manner in way similar to rainfall.
2.Drip system
Drip irrigation is a type of micro-irrigation system that has the potential to save water and nutrients by allowing water to drip slowly to the roots of plants, either from above the soil surface or buried below the surface. The goal is to place water directly into the root zone and minimize evaporation.