International Certified Crop Adviser- Nutrient Management Terms Exam Questions With 100% Correct Answers

International Certified Crop Adviser- Nutrient Management Terms Exam Questions With 100% Correct Answers Acid Soil - answerA soil that has a pH value less than 7.0 Aerobic - answerA condition identified by the presence of oxygen Agronomic nutrient rate - answerAmount of supplemental nutrient required by a crop for a realistic yield goal (yield potential), after all the soil, water, plant, and air credits are considered. Agronomic rates consider nutrient credits from all soil tests, legumes, manure residuals, and any other nutrient source Alkaline soil - answerA soil that has a pH value greater than 7.0 Alum - answerA potassium aluminum sulfate or ammonium aluminum sulfate Ammonium (NH4+) - answerA form of nitrogen that is available to plants and is derived from fertilizer addition and soil organic matter mineralization Ammonium nitrate solution - answerNon-pressure solution of ammonium nitrate in water usually standardized to 20% nitrogen used for direct application or for making multinutrient liquid fertilizer. Analysis is 20-0-0 Ammonium phosphates - answerA group of phosphorus fertilizers manufactured by the reaction of anhydrous ammonia with superphosphoric acid to produce either solid or liquid fertilizers Ammonium sulfate - answerFertilizer material with an analysis of 21-0-0. Also contains 24% sulfur Anaerobic - answerA condition identified by the absence of oxygen Anhydrous ammonia (NH3) - answerFertilizer in pressurized gas form, made by reacting nitrogen in air with hydrogen gas (H2) under high temperature and pressure in the presence of a catalyst. The analysis is 82-0-0 Animal unit - answer1,000 pounds of live animal weight; a term used to determine volumes of animal manure produced Anion - answerAn ion with a negative charge. Common soil anions are chloride, nitrate, sulfate and bicarbonate Anion exchange capacity - answerThe sum total of exchangeable anions that a soil can adsorb at a specific pH. Expressed as centimoles of charge per kilogram (cmolc/kg) of soil or milliequivalents per 100 g of soil (meq/100 g of soil) Application rate - answerThe weight or volume of a fertilizer, soil amendment, or pesticide applied per unit area Aqua ammonia - answerA 20% N solution made by dissolving anhydrous ammonia in water. Available nutrient - answerA nutrient in a form that a plant can absorb. Banded nutrients - answerPlacing solid granular or liquid fertilizer in a band on the soil surface or ejected below the soil surface before, at, or after planting Base saturation percentage - answerThe proportion of the soil's cation exchange capacity occupied by basic cations (sodium, potassium, magnesium and calcium). Bioremediation - answerThe use of biological agents to remove substances hazardous to human health or the environment from contaminated soil or water Biosolid - answerAny organic material, such as livestock manure, compost, sewage sludge, or yard wastes applied to the soil to add nutrients or for soil improvement Buildup and maintenance - answerNutrients applied in order to build up a target soil test level and then maintained by annual addition of the quantity of nutrients expected to be removed in the harvested portion of the crop. Buffer pH - answerA soil test procedure whereby the pH of the soil is measured in buffer solution. This measurement is used to determine the exchangeable acidity of the soil and estimate the lime requirement of the soil. Calcitic lime - answerLimestone consisting of CaCO3 based material with very low magnesium content Calcium carbonate equivalent (CCE) - answerThe liming potential of a material as compared to CaCO3. Cation - answerAn ion that has a positive electrical charge. Common soil cations are calcium, magnesium, hydrogen, sodium, and potassium Cation exchange capacity (CEC) - answerThe sum total of exchangeable cations that a soil can adsorb at a specific pH. Expressed as centimoles of charge per kilogram (cmolc/kg) of soil or milliequivalents per 100 g of soil (meq/100 g of soil)