Agriculture Test Questions/Answers Best Exam Solutions Guaranteed Success.

The most abundant gas in Earth's atmosphere is - correct answer Nitrogen Which of the following are advantages of crop rotation? I. Improvement of soil fertility II. Decreased erosion III. Decreased pest infestation IV. Increased incidence of plant diseases - correct answerI, II, and III The water-holding capacity of soil is LEAST likely to be affected by the addition of which of the following? - correct answer Pesticide Which of the following statements about genetic diversity is true? - correct answer Genetic engineering technology is used to increase genetic diversity by creating new species with synthetic genes Which of the following is likely to minimize soil erosion? - correct answer No-till agriculture When a pesticide was tested, it had no toxicity to mammals. When the pesticide was applied to a farm, the mammals that ate fish in the nearby pond became very sick. Which term below would best explain what happened? - correct answer Biomagnification The green revolution included all of the following "improvements" except: - correct answer Increased soil fertility Which of the following is a process that indirectly removes carbon from Earth's atmosphere? - correct answer Formation of carbonate deposits Elements that cycle in the environment and that also have a gaseous phase at some point in their cycle include which of the following? 1. Carbon 2. Phosphorous 3. Nitrogen - correct answer1 and 3 only Organic farming has all of the following regulations except: - correct answerRadiation can be used during packaging only Photosynthesis is the major source of which of the following gases in Earth's atmosphere? - correct answerO2 Chlorinated hydrocarbon pesticides, such as DDT, - correct answerAre noteworthy because of their persistence in the environment. The Soil Conservation Service was originally established under the ____________________________________ but was later put under the ________________________________________. - correct answerDepartment of the Interior, Department of Agriculture Decomposition - correct answerThe rapid rate of this process in tropical forests by fungi and bacteria results in low nutrient soils. Photosynthesis - correct answerThe process by which glucose is synthesized. Denitrification - correct answerThe process by which a soil nutrient is reduced and released to the atmosphere as a gas. Nitrification - correct answerAmmonia is converted to nitrite then to nitrate Which of the following would be the best definition for Integrated Pest Management? - correct answerB. Combining methods including biological control, chemical pesticides, and different planting methods Information gathered by a scientist about the toxicity of chemical X and chemical Y showed that they had individual safe limits for fish at particular concentrations. But when they were used together at the safe concentrations, there were extensive fish kills. This is an example of: - correct answerSynergism First generation pesticides refer to: - correct answerSynthetic organic chemicals used for control of pests since World War II. Various inorganic chemicals, such as sulfur, cyanide, and heavy metals. Which of the following would be the correct order for the soil horizons from the surface down to the bedrock? - correct answerO, A, E, B, C, and R The two major processes involved in the carbon cycle are: - correct answerPhotosynthesis and respiration To prevent desertification and erosion, which of the following irrigation methods would be best? - correct answerDrip irrigation It has been observed that when a pesticide is repeatedly used over a period of several years it gradually loses its effectiveness in killing pest species. What is the best explanation for this? - correct answer The genetically resistant members of the pest species survive and reproduce a population that is more resistant to the pesticide.