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The ammonium transported in runoff from the composted dairy manure was somewhat consistent for the 10-week study.
In addition, the enzyme was not inhibited by levamisole and ammonium molybdate, excluding alkaline phosphatase and nucleotidase activities, respectively.
Microbial immobilization of ammonium and nitrate in relation to ammonification and nitrification rates in organic and conventional cropping systems.
The differentiation process was stopped by transfer briefly to alkaline alcohol (0.25 ml ammonium hydroxide in 250 ml 70% ethanol).
Differentiation was stopped by transfer briefly to alkaline alcohol (0.25 ml ammonium hydroxide in 250 ml 70% ethanol).
Ammonium was the major source of mineral nitrogen, and glutamine was the most abundant free amino acid.
Nitrification was significantly increased in soils amended with ammonium or with ammonium plus phosphorus, suggesting that nitrification is substrate-limited.
During that time period, the ammonium loss from sulphur-coated urea was significantly greater than that measured from the composted dairy manure.
Treatments include ammonium nitrate (closed circles), sulphur-coated urea (open circles), composted dairy manure (closed triangles), and poultry litter (open triangles).
The post-1996 wheat crop samples were also analysed for exchangeable bases (ammonium acetate extraction) and cation exchange capacity (potassium chloride).
Simulations were performed in three different scenarios of availability of ammonium and oxygen, to evaluate the evolution of the three microbial species present.
One bit of information is from the quaternary ammonium ions and their entry and escape rates through this gate in the open and closed states.
Nitrogen was quite low compared to other species, and it was essentially supplied in the form of ammonium and amino acids.
Ammonium and nitrate were extracted before and after the incubation as described above.
Potassium, nitrate and ammonium concentrations and fluxes showed dramatic responses to hurricane disturbance.
