CCA Exam Questions with 100% Correct Answers | Verified | Updated 2024, Exams of Advanced Education

Download CCA Exam Questions with 100% Correct Answers | Verified | Updated 2024 and more Exams Advanced Education in PDF only on Docsity! CCA Exam Questions with 100% Correct Answers | Verified | Updated 2024 Which of the following is NOT an essential nutrient for plants? - Correct Answer-Na Which of the following plant nutrients is a cation in soils? - Correct Answer-Potassium Which of the following plant nutrients is a macronutrient? - Correct Answer-S Which of the following regulates stomatal openings in plants? - Correct Answer-K Which of the following is a beneficial element that is important in animal nurtition? - Correct Answer-Se Which of the following plant nutrient forms is most immobile in soil? - Correct Answer-Co pg. 1 professoraxe l Which of the following is an uptake form of nitrogen? - Correct Answer-NO3- Which of the following is an uptake form of Phosphorous? - Correct Answer-H2PO4- Which of the following is a chemical uptake form of potassium? - Correct Answer-K+ Which of the following nutrients is a micronutrient? - Correct Answer-Cu At which of the following plant growth stages would you expect the highest demand for soil nutrients? - Correct Answer-mid vegetative Chelates are commonly used to increase the availability of - Correct Answer-Fe Which of the following is the least available source of nutrients? - Correct Answer-Soil minerals pg. 2 professoraxe l Soil sampling in a non-uniform field should be done by the _____ method. - Correct Answer-Grid The depth of sampling no-till soils as compared to conventionally tilled soils is - Correct Answer-Shallower Nutrient concentrations _____ change with depth. - Correct Answer-Usually At which of the following soil test levels would you expect the greatest crop response? - Correct Answer-Low How are soil surveys useful in a soil sampling plan? They _____ - Correct Answer-Provide yield potentials Which of the following concepts of fertilizer recommendations increases soil fertility level most slowly? - Correct Answer- Crop sufficiency If a soil contains 40 lb P/acre, it contains _____ ppm P. - Correct Answer-20 pg. 5 professoraxe l Fertilizer recommendations obtained from a plant tissue analysis are _____ used to make a foliar fertilizer recommendations during that crop year. - Correct Answer- Sometimes _____ plant parts should be sampled to obtain reliable tissue test results. - Correct Answer-Specific Which is the best sample pretreatment for a tissue sample prior to submitting the sample? - Correct Answer-Partially air dry in the paper bag _____ is the plant nutrient concentration below which crop growth rate declines significantly. - Correct Answer-Critical value The chlorophyll meter determines _____ sufficiency in a crop. - Correct Answer-N Which of the following would NOT usually be a good source of N? - Correct Answer-irrigation water pg. 6 professoraxe l The rate of N release is least affected by microbial activity for _____ - Correct Answer-Sulfur coated urea (no wax) If substantial ammonia is lost after application of UAN, a _____ inhibitor might reduce this loss. - Correct Answer- usrease Which of the following nitrogen fertilizer sources has the least % nitrogen? - Correct Answer-ammonium sulfate Which of the following P sources is a liquid? - Correct Answer- ammonium polyphosphate What is the most common form of potassium fertilizer? - Correct Answer-KCl If a fertilizer is 13-13-13 on an oxide basis, what is the analysis on an elemental basis? - Correct Answer-13-5.7-10.8 The portion of a fertilizer that easily dissolves in water is _____. - Correct Answer-water soluble pg. 7 professoraxe l WHich of the following is the best measure of total acidity in a soil? - Correct Answer-buffer pH Which of the following fertilizers has the greatest potential to decrease soil pH? - Correct Answer-ammonium nitrate Which of the following soils would have the highest lime requirement to meet a target pH of 6.5? - Correct Answer-pH 5, 25% clay, 2% OM At which of the following soil pHs would phosphorous be most available for plant uptake? - Correct Answer-6.8 Which of the following micronutrients is more available at pH of 7 than at pH 5? - Correct Answer-Mo Which of the following actually neutralizes soil acidity when lime is applied? - Correct Answer-CO3- Which of the following is NOT used in determining a lime recommendation? - Correct Answer-exchangeable sodium percentage pg. 10 professoraxe l Lime passing through which of the following mesh sizes would be of greatest benefit in neutralizing soil acidity? - Correct Answer-60 ECCE is the product of Effectiveness and _____. - Correct Answer-calcium carbonate equivalence If the ECCE of a liming material is 65 and the lime recommendation for a state is based on a material with an ECCE of 80, how should lime rate be adjusted for the material with an ECCE of 65? - Correct Answer-1.2 times recommendation Which of the following is least likely to change soil pH? - Correct Answer-gypsum Which of the following is characteristic of a N deficiency? - Correct Answer-leaves yellow at the bottom of the plant first Soil testing and plant tissue test are usually _____ - Correct Answer-used to test for nutrient deficiencies pg. 11 professoraxe l Which of the following best describes adaptive nutrient management? - Correct Answer-adjust nutrient applications to optimize yields and profits Production history or level of management is a good way to determine _____. - Correct Answer-yield goals Which of the following is not part of the 4R system? - Correct Answer-sink Which of the following is commonly used to P loss assessments at the field scale? - Correct Answer-P index Which of the following N losses is probably most important for a field of soybenas? - Correct Answer-crop harvest Which of the following conditions allow N-based manure applications? - Correct Answer-low P index If a manure contains 0.2% total P and 50% of the P contributes to soil test P, how much would soil test P increase if 5 ton/acre of the manure is applied to a soil? - Correct Answer- 10 lbs/acre pg. 12 professoraxe l