Agronomy Written Test Questions Part 1 updated and well Researched Correct Questions and Answers_100% Already Graded A+ Pass

Agronomy Written Test Questions Part 1 updated and well Researched Correct Questions and Answers_100% Already Graded A+ Pass Who is given credit for discovering that soybeans were an excellent source of protein and oil and for encouraging farmers to rotate their crops with soybeans? - CORRECT ANSWER-George Washington Carver What term is used to describe fine brown or gray hairs on the leaves, stems, and pods of soybeans? - CORRECT ANSWER-pubescence Which of the following is a true statement regarding soybeans? - CORRECT ANSWER-Soybeans are generally considered a source of complete protein. The top 2 states in terms of soybean production? - CORRECT ANSWER-Iowa and Illinois A (n) _________ is a plant that can fix nitrogen from the air in the soil - CORRECT ANSWER-legume Living organisms that cause disease are often referred to as ______. - CORRECT ANSWER-pathogens Which of the following is a benefit of integrated pest management? - CORRECT ANSWER-reduced pesticide costs Economic injury level is _____. - CORRECT ANSWER-the point at which the cost of pest control equals the revenue loss caused by a pest Which method of pest control involves making the crop environment unsuitable for pests to feed, live, or reproduce? - CORRECT ANSWER-cultural What are used to kill unwanted plants? - CORRECT ANSWER-herbicides What is caused by environmental imbalances and cannot be spread to other plants? - CORRECT ANSWER-noninfectious disease What are the three components of the disease triangle? - CORRECT ANSWER-a susceptible host, a causal agent, and environmental conditions What are the principle causes of most diseases that affect agricultural crops? - CORRECT ANSWER-Fungi Which of the following is a cultural/physical method used to manage pest populations? - CORRECT ANSWER-removing and destroying infected plants What is a pathogen? - CORRECT ANSWER-a living, disease-producing agent Optimum care of plants through irrigation and fertilization reduce weed, disease, and insect problems. Which type of disease control measure do these represent? - CORRECT ANSWER-cultural Use of beneficial predatory insects is an example of which type of pest control? - CORRECT ANSWER-biological Why is the implementation of an IPM program beneficial to the environment? - CORRECT ANSWER-There is reduced contamination and degradation of soil and water. A grower notices that a crop displays yellow streaking and stunted growth and identifies the problem as virus-related. How would this type of disturbance be classified? - CORRECT ANSWER-infectious diseaseinfectious disease What is a tiny, hair-like roundworm that feeds on the roots of plants? - CORRECT ANSWER-nematode What is a main objective of cultural control of plant pests? - CORRECT ANSWER-maintaining healthy plants by providing optimal growing conditions What is the first step in choosing an insecticide for pest control? - CORRECT ANSWER-properly identify the pest What is a nonselective herbicide? - CORRECT ANSWER-one that will kill any plant with which it comes in contact __________________ are absorbed by the roots or other plant parts and moved throughout the plant by vascular tissues - CORRECT ANSWER-Translocated herbicides Dicot plant weeds including dandelions, ground ivy, plantain, and spurge are called __________. - CORRECT ANSWER-broadleaf weeds What describes biological weed control? - CORRECT ANSWER-control uses insects, diseases, predators, or other plants that are harmful to weeds without causing damage to crops What type of weed is injurious to crops, people, or livestock? - CORRECT ANSWER-noxious What type of pesticide is used to kill unwanted plants? - CORRECT ANSWER-herbicides A farmer wants to eliminate ragweed and pigweed that are competing with corn in a field. What type of herbicide should she use? - CORRECT ANSWER-a selective herbicide What classification of herbicides is applied before the weeds and/or crop emerges, but after the crop has been seeded? - CORRECT ANSWER-preemergent herbicides What refers to how herbicides kill weeds, such as, seedling growth inhibitors and photosynthesis inhibitors? - CORRECT ANSWER-mode of action What is the most effective herbicide to use on stubborn perennial weeds such as Canadian thistle that have extensive rhizomes from which new shoots emerge? - CORRECT ANSWER-systemic Annual grasses and small-seeded broadleaf weeds can be controlled in sunflower crops by applying the herbicide before the sunflower is seeded. How would this treatment be classified? - CORRECT ANSWER-pre-plant How do annual weeds reproduce? - CORRECT ANSWER-sexually Why do contact herbicides have limited effectiveness on perennial weeds with underground storage organs? - CORRECT ANSWER-They only kill the plant tissue with which they come in contact. Unclean crop seed may contain weed seed and may be planted along with the crop seed. How is this process categorized? - CORRECT ANSWER-artificial weed dispersal What is the best reason why weeds are controlled in agricultural fields? - CORRECT ANSWER-Weed populations compete with crops or pasture for water, nutrients, light, and space. Nymphs are associated with ____________. - CORRECT ANSWER-incomplete metamorphosis What type of mouthparts do insects that cut, tear, crush, and chomp leaves, stems, roots, flowers, and fruit have? - CORRECT ANSWER-Chewing