What is the process of growing plants without soil called?, Irrigation, Hydroponics, Which crop is the most widely grown cereal in the world?, Corn, Rice, What nutrient is primarily supplied by nitrogen fertilizers?, Nitrogen, Calcium, What is the name of the machine used to harvest grain crops?, Combine harvester, Tractor, Which gas is essential for photosynthesis?, Carbon Dioxide, Oxygen, Which type of soil is best for growing most crops?, Loam, Clay, What is the term for raising fish commercially for food?, Aquaculture, Apiculture, Which vitamin is abundant in carrots?, A Vitamin, D Vitamin, What is the process of bees transferring pollen called?, Pollination, Cultivation, Which livestock animal is mainly raised for wool?, Sheep, Cow, What does GMO stand for?, Genetically Modified Organism, General Market Organization, What is the main purpose of irrigation?, To supply water to crops, To remove weeds, Which crop is commonly used to produce bioethanol?, Corn, Oats, What disease in cattle is commonly called “mad cow disease”?, Bovine spongiform encephalopathy, Avian influenza, What is crop rotation mainly used for?, Improving soil health, Decreasing farm size

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