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2. Labeling of fertilizer - Wikipedia

   en.wikipedia.org/wiki/Labeling_of_fertilizer

   In the U.K., fertilizer labeling regulations allow for reporting the elemental mass fractions of phosphorus and potassium.The regulations stipulate that this should be done in parentheses after the standard N-P-K values, as in "15-30-15 (15-13-13)".

3. Potassium nitrate - Wikipedia

   en.wikipedia.org/wiki/Potassium_nitrate

   Potassium nitrate can be made by combining ammonium nitrate and potassium hydroxide. NH 4 NO 3 + KOH → NH 3 + KNO 3 + H 2 O. An alternative way of producing potassium nitrate without a by-product of ammonia is to combine ammonium nitrate, found in instant ice packs, [30] and potassium chloride, easily obtained as a sodium-free salt substitute.

4. Acron Group - Wikipedia

   en.wikipedia.org/wiki/Acron_Group

   Acron is a global mineral fertiliser producer of complex fertilisers such as NPK and bulk blends, and nitrogen fertilisers such as urea, ammonium nitrate and urea-ammonium nitrate. [2] The Group's key markets are Russia, Brazil, Europe and the United States.

5. Critical relative humidity - Wikipedia

   en.wikipedia.org/wiki/Critical_relative_humidity

   The critical relative humidity of most salts decreases with increasing temperature. For instance, the critical relative humidity of ammonium nitrate decreases 22% with a temperature from 0 °C to 40 °C (32 °F to 104 °F). The critical relative humidity of several fertilizer salts is given in table 1:

6. Urea - Wikipedia

   en.wikipedia.org/wiki/Urea

   The structure of the molecule of urea is O=C(−NH 2) 2.The urea molecule is planar when in a solid crystal because of sp 2 hybridization of the N orbitals. [8] [9] It is non-planar with C 2 symmetry when in the gas phase [10] or in aqueous solution, [9] with C–N–H and H–N–H bond angles that are intermediate between the trigonal planar angle of 120° and the tetrahedral angle of 109.5°.

7. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   Fertilizers are applied to crops both as solids and as liquid. About 90% of fertilizers are applied as solids. The most widely used solid inorganic fertilizers are urea, diammonium phosphate and potassium chloride. [54] Solid fertilizer is typically granulated or powdered. Often solids are available as prills, a solid globule. Liquid ...