International Certified Crop Adviser- Nutrient
Management Terms With 100% Correct Answers
2024. 127 Terms.
Acid Soil
A soil that has a pH value less than 7.0
Aerobic
A condition identified by the presence of oxygen
Agronomic nutrient rate
Amount 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
A soil that has a pH value greater than 7.0
Alum
A potassium aluminum sulfate or ammonium aluminum sulfate
Ammonium (NH4+)
A form of nitrogen that is available to plants and is derived from fertilizer addition and soil organic
matter mineralization
Ammonium nitrate solution
Non-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
A group of phosphorus fertilizers manufactured by the reaction of anhydrous ammonia with
superphosphoric acid to produce either solid or liquid fertilizers
Ammonium sulfate
Fertilizer material with an analysis of 21-0-0. Also contains 24% sulfur
Anaerobic
A condition identified by the absence of oxygen
Anhydrous ammonia (NH3)
, Fertilizer 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
1,000 pounds of live animal weight; a term used to determine volumes of animal manure produced
Anion
An ion with a negative charge. Common soil anions are chloride, nitrate, sulfate and bicarbonate
Anion exchange capacity
The 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
The weight or volume of a fertilizer, soil amendment, or pesticide applied per unit area
Aqua ammonia
A 20% N solution made by dissolving anhydrous ammonia in water.
Available nutrient
A nutrient in a form that a plant can absorb.
Banded nutrients
Placing 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
The proportion of the soil's cation exchange capacity occupied by basic cations (sodium, potassium,
magnesium and calcium).
Bioremediation
The use of biological agents to remove substances hazardous to human health or the environment from
contaminated soil or water
Biosolid
Any 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
Nutrients 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
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