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Which problem does the prolonged liberal irrigation of agricultural fields create?
A crop is defined as a cultivated plant which is commercially grown on a large scale, particularly vegetable, cereal, and fruit. An agricultural field is a field which is used for growing high-valve species of plants or crops.
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- Drought is the main constraint for agriculture sector. What is the major consequence of water insufficiency in plant? *The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Which of the following is not an abiotic factor that affects plants being used in crop rotation? a) NH3 availability b) Soil temperature c) Herbivore density d) Oxygen concentrationSome of the problems associated with intensive irrigationinclude all of the following except(A) soil salinization.(B) overfertilization.(C) land subsidence.(D) aquifer depletion.
- The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? a) To increases usable nitrogen in the soil. b) To increase water retention. c) Nitrogen-fixing plants are not a food crop. d) To decrease bacteria in the soil.Why do pasture grasses continue growing despite being grazed upon by animals and why do lawn grasses continue growing despite being trimmed regularly? *Why are total soil concentrations poor indicators of the amounts of ions that may bioaccumulate (enter the food chain)?
- What are the consequences of soil erosion in urban settings?Describe the effects of overgrazing on soil. What policies can be linked to the practice of overgrazing? What conditions characterize sustainable grazing practices?The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Crop rotation would allow the farmer to reduce which of the following? a) Planting seeds. b) Watering the fields. c) The use of manufactured fertilizer. d) The burning of fossil fuels by farm equipment.