TURF 435 UNIT 3 EXAM QUESTIONS WITH CORRECT ANSWERS LATEST 2025

TURF 435 UNIT 3 EXAM QUESTIONS WITH CORRECT ANSWERS LATEST 2025 What is generally considered a critical (deficiency threshold) tissue concentration of potassium? a) 0.5% b) 1% c) 1.5% d) 3% e) 4% - Answers c Which of the following traits is NOT associated with soluble K fertilizers? a) High salt indices b) Susceptible to leaching loss c) Acid formation d) Good compatibility in tank mixes e) None of the above - Answers c Compared to a 12-8-14 fertilizer, fertilizing with which of the following would require half the material: a) 6-2-0 b) 24-16-20 c) 6-4-7 d) 24-16-28 e) potassium nitrate - Answers c Adequate potassium nutrition is essential to turfgrass: a) synthesis of chlorophyll b) water use and regulation c) canopy color d) disease resistance e) cellular energy storage - Answers b Annual application of what total quantity of S generally ensures turfgrass sufficiency: a) 1 lb ammonium sulfate / acre b) 10 lbs gypsum / M c) 125 lbs gypsum / acre d) 28 lbs potassium sulfate / acre e) all of these choices - Answers a Which of the following group of statements is true about Manganese (Mn): a) mobile, cool season turfgrass tissue threshold deficiency level is 4% b) mobile, cool season turfgrass tissue threshold deficiency level is 3% c) immobile, cool season turfgrass tissue threshold deficiency level is 30 g/kg d) immobile, and available to plants only as Mn+2 and chelated-Mn e) mobile, warm season turfgrass tissue threshold deficiency level is 40 ppm - Answers d Which of the following iron fertilizer forms is/are most dependably available to all turfgrass roots? a) Ferric / ferrous sulfate b) glucoheptonate-chelated Fe c) Calcitic limestone d) iron oxide (i.e. rust) e) synthetically-chelated Fe (EDTA-Fe / EDDHA-Fe) - Answers e This essential macronutrient has only one plant available form, and its primarily role is protein synthesis. a) Potassium b) Nitrogen c) Magnesium d) Phosphorus e) Sulfur - Answers e Imagine you manage a 2-acre bermudagrass sports field. If you needed to raise the upper 6" exchangeable K soil level 75 lbs K per acre, approximately how many total lbs KCl (0-0-60) would you have to use?