A nitrogen stabilizing composition is provided. The composition includes 10% to 18% w/w N-(n-butyl) thiophosphoric triamide (NBPT), a light oil, an emulsifier, and a solvent including N-methyl-2-pyrrolidone (NMP) and two or more of propylene glycol, ethylene glycol, morpholine and glycerine.

Novel polyanionic polymers including families of repeat units, such as maleic, itaconic, and sulfonate repeat units. The polymers are at least tetrapolymers and may be in the acid form or as partial or complete salts. The polymers may be synthesized using free radical initiators in the presence of vanadium compounds. The polymers have a variety of uses, particularly in agricultural contexts.

The invention relates to a method for producing a liquid compound and to the compound used to improve the results of the application of ammoniacal nitrogenated fertilizers to crops requiring same and the ammonium present in the ground, said compound being a mixture consisting mainly of 3.5 DMPP as a nitrification inhibitor, phosphorus, the main function of which is to participate in all of the processes and energetic reactions of the crop, and amino acids winch are synthesized by the plants in enzymatic reactions generated by means of the animation, where absorbed ammonium salts and organic acids are produced.

Solvent systems for the formulation of alkyl thiophosphoric triamide urease inhibitors, that provide stable dispersion of alkyl thiophosphoric triamides for even distribution (in low or high concentrations) onto fertilizers containing urea in liquid or solid form.

An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I)
R.sup.1R.sup.2NP(X)(NH.sub.2).sub.2, wherein X is oxygen or sulfur; R.sup.1 is a C.sub.1 to C.sub.20 alkyl, C.sub.3 to C.sub.20 cycloalkyl, C.sub.6 to C.sub.20 aryl, or dialkylaminocarbonyl group; R.sup.2 is H, or R.sup.1 and R.sup.2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.21, wherein at least one of the groups R.sup.21 is different to the other groups R.sup.21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.22, wherein at least one of the groups R.sup.22 bears the alkoxy or hydroxy substituent at a secondary or tertiary carbon atom and wherein at least one of the groups R.sup.22 is different to the other group(s) R.sup.22, and (C4) an amine containing at least one saturated or unsaturated C.sub.8 to C.sub.40 alkyl group R.sup.23, and (C5) a saturated or unsaturated heterocyclic amine which contains at least one oxygen atom as ring atom and which does not contain a further alkoxy group.

Provided herein are a use of thioether compounds of formula I as nitrification inhibitors, and agricultural mixtures and compositions including the thioether compounds.

Reaction products and methods for making and using the same are provided. In at least one specific embodiment, the fertilizer can include a nitrogen source comprising urea, ammonia, ammonium nitrate, or any combination thereof and a reaction product of formaldehyde, an ammonia source, and a nitrification inhibitor.

Disclosed are compositions and methods of making a liquid fertilizer additive of biodegradable polymeric and/or oligomeric nitrification inhibitors comprised of utilizing a non-aqueous polar, aprotic organo liquid (NAPAOL) as the reaction medium for the reaction of aldehyde(s) with cyano-containing nitrification inhibitors that have one or more aldehyde reactive groups selected from the group consisting of a) primary, b) secondary amines, c) amides, d) thiols, e) hydroxyls and f) phenols.

A low VOC, low vapor pressure, low flash point and nonfoaming fertilizer stabilizer composition comprises: (A) two or more glycol ethers of Formula 1 Each of R.sup.1 and R.sup.3 are independently hydrogen or phenyl with the proviso that R.sup.1 and R.sup.3 are not simultaneously hydrogen, n is an integer of 3-10, and R.sup.2 is 90 to 100% hydrogen or 0 to 10% of one or more of methyl, ethyl or phenyl; and; and at least one fertilizer stabilizer, e.g., an N-alkyl thiophosphoric triamide.

##STR00001##

The invention relates to a solid, particulate, urea-based blend composition comprising a urea-based compound in particulate form, one or more components in particulate form, selected from the group of nitrates, phosphates, sulphates and chlorides, and a urease inhibitor of the type phosphoric triamide, in particular N-(n-butyl) thiophosphoric triamide (nBTPT), wherein the urea-based blend composition is further characterized in that it comprises one or more reactive alkaline or alkaline-forming inorganic or organic compounds. The composition according to the invention has been stabilized against the degradation of a urease inhibitor of the type phosphoric triamide, in particular N-(n-butyl) thiophosphoric triamide (nBTPT). The invention further relates to a method for the manufacture of the claimed solid, particulate, urea-based blend composition.