Question

✏️on what basis plants are selected for breeding( one marks question )
✏️name any three fodder crops (one marks question)
✏️ how do earthworms improve the soil fertility( one mark question)



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Answer 1

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(1)
☀Self-fertilization, where pollen from a plant will fertilise reproductive cells or ovules of the same plant


☀Cross-pollination, where pollen from one plant can only fertilize a different plant

☀Asexual propagation (e.g. runners from strawberry plants) where the new plant is genetically identical to its parent



(2)
☀barley
☀ alfalfa
☀ maize


(3)


As they deposit their castings, their mucous is deposited into the soil
. It helps to slow the release of nutrients and prevents them from being washed away with the first watering. Earthworm manure or casts are richer in minerals than the soil in which the earthworms work to breakdown their organic matter.

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Answer 2

1. The mode of reproduction of a crop determines its genetic composition, which, in turn, is the deciding factor to develop suitable breeding and selection methods.

2. maize,alfalfa and barley.

3.As they deposit their castings, their mucous is deposited into the soil. It helps to slow the release of nutrients and prevents them from being washed away with the first watering.

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