Fertilizer101 Resources Ferti Quote
"I know of no pursuit in which more real and important services can be rendered to any country than by improving its agriculture, its breed of useful animals, and other branches of a husbandman's cares."
-- George Washington

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Acid-Forming - A product that tends to make the soil more acid.

Ammonia - See Anhydrous Ammonia and Aqua Ammonia.

Ammoniated Superphosphate - A product formed by reacting superphosphate with ammonia.

Ammoniation - A process wherein ammonia (anhydrous, aqua or a solution containing ammonia and other forms of nitrogen) is used to treat superphosphate to form ammoniated superphosphate, or to treat a mixture of fertilzer ingredients (including superphosphate) in the manufacture of a multiple-nutrient fertilizer.

Ammonium Hydroxide (NH4OH) - See Aqua Ammonia.

Ammonium Nitrate (NH4NO3) - A product containing approximately 33.5 percent nitrogen, one half of which is in the ammonium form and one half in the nitrate form. Ammonium nitrate is water soluble and is also used in fertilizer solutions.

Ammonium Nitrate Limestone - A combination of ammonium nitrate and limestotne to form a product containing 20.5 percent nitrogen.

Ammonium Phosphate - A product manufactured by reacting ammonia with phosphoric acid. Different phosphates can be formed, depending upon the amount of ammonia reacted with the acid. Two commonly used for fertilizer purposes are monoammonium phosphate, NH4H2PO4 (11-52-0); an diammonium phosphate, (NH4)2HPO4 (21-53-0, 16-48-0, and 18-46-0), the latter two analyses resulting when wet process phosphoric acid is used.

Ammonium Phosphate Sulfate - Wet process phosphoric acid containing an excess of sulfuric acid is neutralized with ammonia to make products such as 16-20-0.

Ammonium Sulfate ((NH4)2SO4) - A solid material manufactured by reacting ammonia with sulfuric acid, typically containing 20.5 percent-21 percent nitrogen.

Analysis - (see also grade.)The percentage composition as found by chemical analysis, expressed in those terms that laws require or permit. Although analysis and grade sometimes are used synonymously, the term grade usually is applied only to the three primary plant nutrients - nitrogen (N), available phosphate (P2O5), and soluble potash (K2O) - and is stated as the guaranteed minimum quantities present.

Anhydrous Ammonia (NH3) - A gas containing approximately 82 percent nitrogen. Under pressure, ammonia gas is changed to a liquid and is stored and transported in this form.

Aqua Ammonia (NH4OH) - Is ammonium hydroxide, and is formed by dissolving anhydrous ammonia in water. Commercial grades of ammonia liquor usually contain 20 percent-25 percent nitrogen. Most of it is used either for direct application to the soil or in the manufacture of ammoniated superphosphates.

Available Phosphate - The P2O5 equivalent of a fertilizer soluble in water plus neutral ammonium citrate, and considered readily available to growing plants. The traditional term has been available phosphoric acid (frequently abbreviated A.P.A.). This is a misnomer because, chemically, phosphoric acid is H3PO4. The correct chemical name for P2O5 is phosphorus pentoxide. The compound, P2O5, as such, never is found in fertilzer, but historically, has been an accepted term for expressing content of phosphorus.

Basic Slag - A by-product in the manufacture of steel, containing lime, phosphate and small amounts of the plant food elements such as sulfur, manganese and iron. Basic slags may contain from 10 percent-17 percent phosphate (P2O5) and 35 percent-50 percent calcium oxide (CaO) and 2 percent-10 percent magnesium oxide (MgO). The available phosphate content of most American slag is in the range of 8 percent-10 percent.

Best Management Practices - In agriculture and the fertilizer industry, best management practices (BMPs) are measures taken to prevent air and water pollution during the manufacture, transport, storage, and use of crop inputs such as fertilizer.

Bone Meal - Raw bone meal is cooked bones ground to a meal without any of the gelatine or glue removed. Steamed bone meal has been steamed under pressure to dissolve part of the gelatine.

Borax (Na2B4O7.10H2O) - A salt used in fertilizer as a source of the plnat nutrient element boron. Fertilizer borax contains about 11 percent boron.

Boron (B) - See borax.

Brand - The trade name assigned by a manufacturer to his particular fertilizer product.

Broadcast - Application of fertilizer or other material to the soil surface.

Broadcast Incorporated - Broadcast application of fertilizer or other material that is then worked into the soil.

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