An improved solvent system for the formulation and application of N-alkyl thiophosphoric triamide urease inhibitors. These formulations provide safety and performance benefits relative to existing alternatives and enable storage, transport and subsequent coating or blending with urea based or organic based fertilizers. These formulations are comprised primarily of environmentally friendly aprotic and protic solvents (particularly dimethyl sulfoxide and alcohols/polyols) to stabilize the urease inhibitor.

A composition including (a) at least one (thio)phosphoric acid triamide (T) according to the general formula (Ia)

R.sup.a1R.sup.a2N—P(X)(NH.sub.2).sub.2  (Ia)

wherein X is oxygen or sulfur; R.sup.a1 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.a2 is H; or R.sup.a1 and R.sup.a2 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 (b) at least one specific herbicide.

An improved nitrification inhibitor composition comprising UFP particles and a nitrification inhibitor, and optionally other components, is used as an additive for liquid and solid fertilizers, typically containing urea. The nitrification inhibitor particularly can be nitrapyrin and/or DMPP. Methods of making the compositions and their use are also disclosed.

The present invention relates to improving the efficacy of man-made and/or natural organic-based animal manure fertilizers by administration of an organic solvent formula containing polyorganic acids and/or their salts. The formulation liberates nutrient(s) that are normally bound in the soil as insoluble salts and complexes. These delivery formulations also provide an environmentally sound and inherently safe solvating system that improves diffusion of polyorganic acids to the granule fertilizer. These delivery formulations enable safe storage, transport and subsequent application or blending with solid or liquid fertilizers. The combined formulation and fertilizer can be applied to soil to provide improved efficacy of fertilizer by liberating nutrients bound in the soil for uptake by plant life.

The present disclosure provides novel agricultural microbial inoculant compositions for uses in promoting plant growth, plant productivity and/or soil quality. The novel microbial inoculant compositions comprise one or more microbial species, one or more urease inhibitors and/or one or more nitrification inhibitors. The present disclosure also provides fertilizer compositions comprising said microbial inoculant compositions.

Methods for enhancing the stability of urease inhibitors and urease inhibitor-containing compositions and for reducing the rate of degradation of urease inhibitors and urease inhibitor-containing compositions are provided. Such methods generally involve providing the urease inhibitor in the form of one or more adducts of the urease inhibitor with urea, an aldehyde, or both urea and the aldehyde.

A urease inhibiting acidic fertilizer composition is provided, the fertilizer composition including urea; one or more adducts of a urease inhibitor with urea, formaldehyde, or both urea and formaldehyde; a particulate acidic fertilizer; and a basic component. Methods of forming and using such fertilizer compositions are also provided herein.

An improved nitrification inhibitor composition comprising UFP particles and a nitrification inhibitor, and optionally other components, is used as an additive for liquid and solid fertilizers, typically containing urea. The nitrification inhibitor particularly can be nitrapyrin and/or DMPP. Methods of making the compositions and their use are also disclosed.

Reaction products and methods for making and using such reaction products are provided. For example, a reaction product comprising an adduct formed from two or more of a first nucleophile (e.g., including, but not limited to, a urease inhibitor), a second nucleophile, and an electrophile is described, which can be provided in various forms. Such a reaction product can be in the form of a solid or solution. Such a reaction product can also be combined with one or more additional components, including but not limited to, free urease inhibitor and/or a nitrogen-based fertilizer composition.

An inhibitor composition contains dicyandiamide as a nitrification inhibitor, alkyl thiophosphoric triamide as a urease inhibitor, or a combination thereof, dissolved in a liquid medium comprising an organic solvent selected from, among others, one or more polar aprotic solvents, including one or more organophosphates, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, is useful in making fertilizer compositions and in a method of fertilizing target plants.