A method of calcination includes providing a raw material including whitlockite Ca.sub.9(Mg,Fe.sup.2+)[PO.sub.3(OH)|(PO.sub.4).sub.6], and/or iron phosphate FePO.sub.4, and/or aluminum phosphate AlPO.sub.4 and/or fluorapatite Ca.sub.5(PO.sub.4).sub.3F; providing an alkaline-sulfuric compound as an additive; and calcining a mixture of the raw material with the additive to obtain a product, including a citrate soluble phosphate compound.

A controlled release phosphate-based glass fertilizer composition includes at least one macro element selected from the group consisting of 28-50P.sub.2O.sub.5, 36>CaO, 25>SiO.sub.2, 0.1-10 Al.sub.2O.sub.3, 20>Na.sub.2O, and 20>K.sub.2O as a mole percent, an oxide selected from the group consisting of SO.sub.3 and MgO, and a microelement selected from the group consisting of Mn, Cu, B, Mo, Zn, and Fe. The controlled release phosphate-based glass fertilizer composition has a glass transition temperature which is adjusted above 230? C.

A controlled release phosphate-based glass fertilizer composition includes at least one macro element selected from the group consisting of 28-50P.sub.2O.sub.5, 36>CaO, 25>SiO.sub.2, 0.1-10 Al.sub.2O.sub.3, 20>Na.sub.2O, and 20>K.sub.2O as a mole percent, an oxide selected from the group consisting of SO.sub.3 and MgO, and a microelement selected from the group consisting of Mn, Cu, B, Mo, Zn, and Fe. The controlled release phosphate-based glass fertilizer composition has a glass transition temperature which is adjusted above 230? C.

A method of fertilizing a plant comprises applying to a plant an effective amount of a composition comprising a product of a salicylic acid, a potassium polyphosphite, a potassium phosphite, and a potassium phosphate. The composition may be prepared by reacting salicylic acid, ammonium hydroxide, potassium hydroxide and/or potassium carbonate, phosphoric acid, and phosphorous acid.

A method of fertilizing a plant comprises applying to a plant an effective amount of a composition comprising a product of a salicylic acid, a potassium polyphosphite, a potassium phosphite, and a potassium phosphate. The composition may be prepared by reacting salicylic acid, ammonium hydroxide, potassium hydroxide and/or potassium carbonate, phosphoric acid, and phosphorous acid.

A method of fertilizing a plant comprises applying to a plant an effective amount of a composition comprising a product of a salicylic acid, a potassium polyphosphite, a potassium phosphite, and a potassium phosphate. The composition may be prepared by reacting salicylic acid, ammonium hydroxide, potassium hydroxide and/or potassium carbonate, phosphoric acid, and phosphorous acid.

A composition, in the form of an aqueous suspension. The composition comprises at least one form of attapulgite present in a solid weight fraction (SWF) amount ranging from 0.065% to 0.30%. The composition comprises kaolin present in a percent solids by weight (w/w %) amount ranging from 0.80% to 2.80%. The composition comprises one or more main plant nutrients or major animal mineral nutrient supplements. In the composition, the total percent solids by weight (w/w %) amount in the composition ranges from 45% to 90%. Although usable for other purposes, the composition is usable as a fertilizer. Although makeable in other ways, the composition is makeable by mixing the ingredients with agitation sufficient enough to form an aqueous suspension.

A composition, in the form of an aqueous suspension. The composition comprises at least one form of attapulgite present in a solid weight fraction (SWF) amount ranging from 0.065% to 0.30%. The composition comprises kaolin present in a percent solids by weight (w/w %) amount ranging from 0.80% to 2.80%. The composition comprises one or more main plant nutrients or major animal mineral nutrient supplements. In the composition, the total percent solids by weight (w/w %) amount in the composition ranges from 45% to 90%. Although usable for other purposes, the composition is usable as a fertilizer. Although makeable in other ways, the composition is makeable by mixing the ingredients with agitation sufficient enough to form an aqueous suspension.

A phosphate-based glass fertilizer and a method for producing the same are provided. The glass fertilizer and a glass blend from which the glass fertilizer is obtained, have a composition that includes P.sub.2O.sub.5 with a molar proportion within the range between 40% and 50%, K.sub.2O with a molar proportion within the range between 8% and 17%, CaO with a molar proportion within the range between 15% and 25%, Al.sub.2O.sub.3 with a molar proportion within the range between 3% and 10%, and Na.sub.2O with a molar proportion within the range between 8% and 17%, with respect to the combined total molar amount of components that constitute the composition.

A phosphate-based glass fertilizer and a method for producing the same are provided. The glass fertilizer and a glass blend from which the glass fertilizer is obtained, have a composition that includes P.sub.2O.sub.5 with a molar proportion within the range between 40% and 50%, K.sub.2O with a molar proportion within the range between 8% and 17%, CaO with a molar proportion within the range between 15% and 25%, Al.sub.2O.sub.3 with a molar proportion within the range between 3% and 10%, and Na.sub.2O with a molar proportion within the range between 8% and 17%, with respect to the combined total molar amount of components that constitute the composition.