Certified Crop Advisor Exam Questions With 100% Correct Answers

Certified Crop Advisor Exam Questions With 100% Correct Answers What reproductive stage is silking? - answerR1 How might weeds that emerge after the critical period affect crops? - answerProduce a significant amount of weed seed Micronutrients are ________ deficient in Iowa soils. - answerRarely Corn leaf initiation ends between what growth stages? - answerV4 - V6 The discovery of small nodules with pink to red centers on soybean roots would be a sign of: - answerProper nitrogen fixation for the soybean plant Physiological maturity occurs approximately ______ days after silking. - answer64 - 66 During which reproductive stage will the kernel be filled with clear liquid? - answerR2 Most pathogens survive Iowa's harsh winters in: - answerPlant Residue Which of the following is not a competitive trait of insects? - answerVery specific diet choice What is the disease cycle? - answerSequence of events in the development, reproduction, and survival of a plant disease Which of the following herbicides has a much longer half-life when pH is greater than 7? - answerChlorimuron Which of the following is an example of a signal word? - answerCAUTION, WARNING, DANGER Herbicides are often more persistent under _____ conditions. - answerDry Which of the following is a way that erosion reduces soil productivity? - answerLoss of top soil, nutrient loss to waterways, potential damage to plant stands The soil exchange complex is: - answerNegatively Charged Which soil component will have the most surface area? - answerClay The genetic makeup of soybean is most related to development of which nutrient deficiency symptom. - answerIron What soil usually will have the greatest total percent pore space? - answerClay Which of the following Kd values would belong to a herbicide that would be least tightly bound to soil? - answerKd = 10 At what stage does the milk line become visible in the kernels? - answerDent stage Active acidity is the hydrogen ions: - answerIn soil water Which of the following is the most efficient way to accurately estimate soybean populations in a field? - answerUse a hula hoop to determine plants in an area to estimate population The R1 stage is also referred to as beginning - answerBloom The majority of corn roots are located: - answerIn the upper 1.5 feet of soil The maximum potential number of rows per ear is determined at what growth stage? - answerV7 A corn plant has _________ flowers. - answerImperfect The R6 State is also referred to as - answerPhysiological Maturity Soil pH ____ is sufficient for alfalfa. - answer6.9 Soil structure plays an important role in: - answerWater Movement, Root Growth, Aeration What act established a health-based standard for assessing risk of pesticide residues in food or feed? - answerFood Quality Protection Act What is a likely cause of kernel abortion during the blister stage? - answerInadequate carbohydrate supply Mg2+ is considered a _______ cation. - answerbasic The mineral, organic matter, air, and water components of soil all form the: - answerSoil composition Which of the following Kd values would belong to a herbicide that would be most tightly bound to soil? - answerthe highest kd value possible What is a way that erosion reduces soil productivity? - answerLoss of organic matter and nutrients How does the potato leafhopper overwinter in Iowa? - answerPotato leafhopper does not overwinter in Iowa