Abstract: A water dispersible solid or semi-solid composition is disclosed which comprises metal ions sequestered by an alkali-modified brewer's wort. The composition provides a source of bioavailable, stabilized trace metals for use in animal feeds or fertilizers.

Abstract: There is provided a solid composition of an organic fertilizer which is the solid product obtained by desalting a vinasse with phosphoric acid in the presence of ethanol. The product contains at least 1.5% of nitrogen, at least 4% of P.sub.2 O.sub.5, at least 5% of K.sub.2 O and at least 8% of carbon. Another composition, this one comprising a mixture of the foregoing with one or more inorganic or organic nitrogen, phosphorus or potassium compounds to yield a complex organo-mineral fertilizer, is also described.

Abstract: A process for the preparation of a slow-release fertilizer comprising the steps of:(a) grinding a first volume of peanut hulls to a particle size of 1/32 to 1/4 inch and a second volume to 1/8 to 1/2 inch,(b) treating said first a volume of hulls with an equal volume of 2N (normal) nitric acid for 30 minutes at 121 degrees C. and 15 p.s.i. pressure to extract and solubilize the liqueous material from the hulls,(c) adding 1 volume of 1 normal solubilized sodium hydroxide to 2 volumes of said second volume of peanut hulls and heating and stirring said mixture until said nutrients are solubilized,(d) heating said second volume of peanut hulls and sodium hydroxide with steam and at a temperature of 121 degrees C. and pressure of 15 p.s.i.

Abstract: Micronutrient fertilizer consisting of iron, manganese, copper, boron, and zinc in which the manganese-to-iron ratio is 8 to 20%, the copper-to-iron ratio is 5 to 10%, the boron-to-iron ratio is 0.4 to 1.0%, and the zinc-to-iron ratio is 6 to 12%.

Abstract: A process for producing a citric acid soluble potassium silicate fertilizer comprises a step for kneading a mixture consisting essentially of potassium carbonate, fly ash, pulverized coal, other necessary starting materials and a caustic potash solution as a binder and then granulating the kneaded mixture, a step for drying the granulated product to a nearly absolutely dry state, and a step for calcining the dried granular product, whereby a chemical reaction takes place between the potassium and the silicon present in fly ash to convert them into a citric acid soluble potassium silicate.

Abstract: The production of a fertilizer from tree bark is improved by a process of the type wherein crushed waste bark is treated together with waste molasses under elevated pressure and at a temperature of 75.degree. to 140.degree. C. for a time of 10 min. to 2 hrs. said time being dependent on the treatment temperature, and wherein the improvement comprises adding of yeast to the waste molasses, and maintaining its temperature at 30.degree. to 40.degree. C. for 35 to 45 hours, whereby its pH value decreases to 3-4, before it is mixed with the ground waste bark.

Abstract: A process for the preparation of a high grade fertilizer from pressing residues obtained from wine and fruit juice production is disclosed wherein the residues are first stored under anaerobic conditions and are then loosely mixed with air to produce a mass which then undergoes intense aerobic degradation to produce heat, carbon dioxide, moisture and a finely divided high quality fertilizer. Apparatuses for carrying out this process are also disclosed.

Abstract: An acidic organic agricultural product is made by conditioning organic sewage sludge with amounts of FeCl.sub.3 and sugar factory waste lime to provide an acidic conditioned sludge, of pH greater than 3.0 but less than 5.7 and then mechanically dewatering the conditioned sludge.

Abstract: A process for obtaining fertilizer salts and organic substance concentrates of high nutritive value from industrial waste waters, in particular of waste waters of the agricultural, food processing and food preserving industries, with a high content of Totally Dissolved Solids (T.D.S.), includes the following operating phases:Automatic diversion of the high T.D.S. content waste waters from those of low T.D.S. content by means of a conductivity or density measuring instrument.Mixing of the high T.D.S. content waste waters with strong acids or bases, according to the composition of the waste waters, so as to form stable salts.Filtration of the so-formed solution for the purpose of eliminating the insoluble substances and precipitates.Concentration of the solution by means of evaporation.Crystallization of the concentrated solution.Separation by means of centrifugation of the fertilizer salts from the mother liquors containing organic substances of high nutritive value.