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Impact of Weeds on Rice Production

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Questions and Answers

What is a major way that weeds reduce rice yields?

By serving as alternate hosts of insect pests and diseases

By competing with rice plants for sunlight, moisture, space, and soil nutrients (correct)

By releasing toxic chemicals that harm rice plants

By increasing the water requirements of rice plants

In which type of rice paddies are weeds a more serious problem?

Flooded rice paddies

Rainfed rice paddies

Transplanted irrigated rice paddies

Upland and direct seeded wet land (correct)

What is an additional role that weeds play in rice cultivation?

They serve as a food source for beneficial insects

They increase the fertility of the soil

They improve the water-holding capacity of the soil

They serve as alternate hosts of insect pests and diseases (correct)

What is the definition of a weed?

A plant that grows in places where they are not wanted Signup and view all the answers

What is NOT a way that weeds affect rice cultivation?

They increase the soil's water-holding capacity Signup and view all the answers

What is one of the essential resources that weeds and rice plants compete for?

Soil nutrients Signup and view all the answers

What is a secondary role that weeds play in rice cultivation?

Alternate hosts of insect pests and diseases Signup and view all the answers

In which type of rice cultivation do weeds have a relatively smaller impact?

Transplanted irrigated rice paddies Signup and view all the answers

What is the primary effect of weeds on rice yields?

Competing with rice plants for essential resources Signup and view all the answers

What is the main difference between the impact of weeds in upland and transplanted irrigated rice paddies?

Weeds are more serious in upland rice Signup and view all the answers