The Determination of Ammonia in Soils

The Absorption of Ammonium and Nitrate Nitrogen by Various Plants at Different Stages of Growth1

“…NH4-N in the soils was determined by the aeration method of Potter and Snyder (6). N0 3 -N in the soil was determined by the phenoldisulfonic acid method.…”

MBLDP-R: A Multiple Biomolecules Based Rapid Life Detection Protocol Embedded in a Rover Scientific Subsystem for Soil Sample Analysis

“…However, considering the factors of requirement analysis such as the complexity of the equipment required for the tests, compatibility with the rover system and budget constraint of URC 2021, the traditional methods seemed to be more suitable than the modern methods. On a similar note, methods of detecting ammonia from soil samples may include Schloesing's methods, Baumann's method or Russel's methods 35 . Ammonia can also be detected by using dilute sodium hydroxide solution and heating it.…”

“…It, therefore, had to be discontinued because this strong alkali even at low temperatures gradually decomposes the organic nitrogen compounds giving rise to ammonium ions. Hydrochloric acid (#1) needed in the second Schloesing's method removes approximately 60% to 70% of the added ammonium ions 35 . This method requires the distillation of the soil directly with magnesia, and the amount of ammonium obtained by distillation is dependent on the duration of the distillation, which is proportional to the amount of water and soil used and, on the amount of heat applied.…”

Decomposition of cyanamide and dicyanodiamide in the soil

“…The amounts of ammonia in the soil were determined by Folin's aeration method, which has been modified and adapted for soil investigation by Potter and Snyder (26). It was essential to success that the method should entail no formation of ammonia from the cyanamide or dicyanodiamide.…”