This set of Agriculture Multiple Choice Questions & Answers (MCQs) focuses on “Crop Weed Competition”.
1. Which of the following is not important factor for Crop-weed competition?
a) Nutrients
b) Light
c) Soil
d) Water
View Answer
Explanation: Nutrients, light and water are important factors for Crop-weed competition. Weeds fight the crops for these factors which are essential for their survival.
2. The critical crop weed competition for most of the weeds is ___________
a) 12 days
b) 30 days
c) 25 days
d) 60 days
View Answer
Explanation: The critical crop weed competition for most of the crops is 30 days. Critical crop weed competition is the time between which the weed should be controlled in order to reduce its effect on the yield of crop.
3. Which of the following weed induces water shortage in Soybean crop?
a) Abutilon theophrasti
b) Euphorbia hirta
c) Cyperus rotundus
d) Lantana camara
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Explanation: Abutilon theophrasti extract decreases water status of soybean, which leads to stomatal closure.
4. Which of the following is not a property of weeds?
a) They spread reproductively
b) Able to regenrate lost parts
c) Compete with cultivated parts
d) It produces seeds in flushes
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Explanation: The weeds are mainly spreaded by vegetative parts such as rhizome. They are able to generate lost parts, compete with cultivated plants and hinder their growth.
5. Which is not a characteristic of weed?
a) Bearing seeds
b) Propagules
c) Seed production through apomixes
d) All seed of weed mature differentially
View Answer
Explanation: The property of all weed seed is to mature simultaneously at same time. They are prolific with high fecundity.
6. Which of the following is not a way to disseminate weeds?
a) Weeds fall near to the mother plant
b) Travel a long or short distance
c) Travel with agricultural crops
d) Weeds fall far from mother plant
View Answer
Explanation: The weed plants are prolific bearers. They fall near to mother plant. They can travel short or long distance.
7. Which of the following weed was introduced from outside?
a) Jhonson grass
b) Abutilon
c) Cyperus
d) Cyanodon
View Answer
Explanation: Jhonson grass was introduced from outside. The other name for Jhonson grass is Sorghum halepense.
8. Which of the following is a not way for the weeds to travel to different areas?
a) Birds
b) Irrigation
c) Human activities
d) Impurities in crop seed
View Answer
Explanation: The weeds travel to different places through various factors such as human activities, irrigation and impurities in the seed.
9. Which of the following is not true for weeds?
a) Threshing and cultivating machines spread rhizomes
b) Canada thistle seeds disseminate by wind
c) Manuring with decomposed FYM and compost
d) Animals are responsible for weed infestation
View Answer
Explanation: Manuring with partially decomposed FYM and compost is responsible for semination of weeds to different places. Threshing and cultivation machines spread rhizomes, animals are responsible for weed infestation.
10. Which of the following does not come under Weed Control?
a) Preventive measures
b) Curative measures
c) Eradication
d) Management
View Answer
Explanation: Preventive measures and curative measures such as Eradication and Control are useful to control the weeds scientifically with chemical and biological measures.
Sanfoundry Global Education & Learning Series – Agriculture.
To practice all areas of Agriculture, here is complete set of Multiple Choice Questions and Answers.
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