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- A nutrient element is considered essential ifa. plant growth increases with a reduction in the concentrationof the element.b. plants die in the absence of the element.c. plants can substitute a similar element for the missingelement with no ill effects.d. the element is a positive ion.(a) Younger plant parts/materials decompose faster compared to older more lignified plant parts/materials; (b) Materials with narrow C:N ratio will decompose more easily compared to materials with wider C:N ratio. A. If statement A is true B. if statement B is true C. both statement A and B are true D. statement A nor B are trueWhen a plant is deficient of a macronutrient, such as nitrogen, it would have students growth will not be able to complete its life cycle. A. true b. False
- Zinc deficiency is more common in developing countries because: a) inhabitants usually eat a low-meat diet b) inhabitants usually eat a high grain diet which is high in phytate c) zinc may be lost through diarrhea, which is common in these countries d) all of these Probably the best indicator of micronutrient deficiency in children is a) hair loss b) low energy c) growth stunting d) irritability Genetic modification of a plant which results in increased zinc content and decreased phytate content is called: a) bio-enrichment b) bio-fortification c) nutrient engineering d) essential mineral genomics One region in which the use of zinc fertilizers has shown great success is: a) Northern Appalachia b) Eastern Ukraine c) Central Anatolia d) the U.S. Desert Southwest In India, zinc is often combined with which material to make fertilizer? A) horse manure b) ammonium nitrate c) tea leaves d) ureaCamellia and azalea are plants that produce yellow leaves, which is considered an undesirable outcome, when they are grown on alkaline soil. Which of the statements below support the fact about camellia and azalea stated above? a. Loam soil is not advisable to be used in growing camellia and azalea because of its acidity. b. Camellia and azalea should not be planted in chalk soil. c. Camellia and azalea produced yellow leaves because they are planted in acidic soil. d. Camellia and azalea require chalk soil to counter the effect of the alkaline soil used.In New York, farmers typically have a 3 year crop rotation of corn – soybeans – green manure. A) explain one reason crop rotation is important in farming B) explain what green manure is and why a grower would use it as part of their rotation schedule
- This is an essential macronutrient in plants Select one: a. sulfur b. selenium c. zinc d. arsenic e. carbonThis is a beneficial but not essential nutrient in plants. Select one: a. carbon b. sulfur c. zinc d. silicon e. arsenicA mineral deficiency is likely to affect older leaves more thanyounger leaves if(A) the mineral is a micronutrient.(B) the mineral is very mobile within the plant.(C) the mineral is required for chlorophyll synthesis.(D) the mineral is a macronutrient.
- The plant material left in the field after harvest is known as crop ____________; use of this material significantly boosts biofuel yields and should ease the cost of corn and corn-based foods.Which type of plant secondary metabolite is best known for theantioxidant properties of human foods such as blueberries, tea, andgrape juice?a. alkaloids b. cannabinoids c. carotenoids d. phenolics e. terpenoidsWhat time of day would you want to harvest hay in order to have the highest starch content in the forage? Select one: a. 8 am b. 4 pm c. 8 pm d. 6 am e. 12 pm
