Nano urea fertiliser and method of manufacture thereof

An aqueous fertiliser composition containing stabilized nano clusters of ≤100 nm comprising a nitrogen source, a non-ionic surfactant, an amino acid, a polymer matrix, optionally an acid, antimicrobial agents, and multi-functional chemical moieties such as amino, nitrogen, sulphur, boron;

• wherein, the non-ionic surfactant is in a range from 0.5-2% w/v, the polymer matrix is in a range from 0.05-5% w/v, the amino acid is in a range from 0.1-1% w/v,
• wherein the nitrogen source is selected from urea, thiourea, a first ammonium salt, a second ammonium salt, or combinations thereof;
• wherein the nitrogen source comprises,
• i) (urea):(first ammonium salt):(second ammonium salt) in a ratio of (1-7):(1-7):(1-7), or
• ii) (urea):(thiourea) in a ratio of (1-8):(1-4), or
• iii) (urea):(first ammonium salt) in a ratio of (1-4):(1-3), or
• iv) (urea):(second ammonium salt) in a ratio of (1-10):(1-10). or
• v) (urea):(thiourea):(first ammonium salt) in a ratio of (1-6):(1-3):(1-4), or
• vi) (urea):(thiourea):(second ammonium salt) in a ratio of (1-5):(1-4):(1-4), or
• vii) (urea):(thiourea):(first ammonium salt):(second ammonium salt) in a ratio of (0.5-30):(0.5-3):(1-30):(1-30).