Reason why gardener will get the largest mass of peas from his garden if he grows variety?

Is there anything that kills thistles that doesn't harm the hay around them? What are the parts of a cactus called? Where is the Dr Craven's mansion located in The Secret Garden? What wealth do memories of the scene give to the poet fro poem daffodils? What was the earliest grasses? In which biome would you most likely find this plant and animals that are adapted to survive in hot humid climates? What is the native range of the aye aye? Does poison ivy grow by the beach? Why do you think sindh needs more fertilizer? What is eating sunflower leaves? What are amaryllis needs? Is almond a monocot? What is the plant indigo used for? What kingdom is the cypress tree? Do conch eat seaweed? What is a slave plantation? What are the two genes of a Venus's-flytrap? How can you use superheated steam to grow plants? How do you store the forced bulbs after they have bloomed indoors and replant them in the spring? What do you call the bristly process of barley?

Reason why gardener will get the largest mass of peas from his garden if he grows variety?