Calcium nitrate and ammonium nitrate limestone as sources of nitrogen for oats and barley

Urea and ammonium nitrate as sources of N for wheat,sugarbeets and chickpeas in A 3-year crop rotation

Nitrate and ammonia as nitrogen sources for deep subsurface microorganisms

We investigated the N-utilizing bacterial community in anoxic brackish groundwater of the low and intermediate level nuclear waste repository cave in Olkiluoto, Finland, at 100 m depth using (15)N-based stable isotope probing (SIP) and enrichment with (14∕15)N-ammonium or (14∕15)N-nitrate complemented with methane. Twenty-eight days of incubation at 12°C increased the concentration of bacterial...

Fate of Nitrogen-15 Enriched Ammonium Nitrate Applied to Corn

Nitrogen utilization by corn (Zea mays L.) is influenced by the form of inorganic N present in the root zone. A field experiment was conducted on Enon sandy loam (fine, mixed, thermic Ultic Hapludalf) to determine N use efficiency and its partitioning in various plant parts of corn. Ammonium nitrate labeled either as NH4-N or NO3-N and applied at 50, 100, or 200 kg N ha" was evaluated. Microplo...

Effect of electron donors on anammox coupling with nitrate reduction for removing nitrogen from nitrate and ammonium.

Anammox coupling with nitrate reduction under various electron donors was studied using sludge acclimatized to have anammox and denitrification activities. Due to a deficiency in electron donors for NO(3)(-) reduction, anammox activity in an inorganic medium containing NO(3)(-) and NH(4)(+) was lower than that in NO(2)(-) and NH(4)(+). Anammox could use NO(2)(-) competitively against denitrifie...

Nitrate transport and ammonium-nitrate interactions at high nitrate concentrations and low temperature

The unplications of the operation of biphasic nitrate transport and the effects of low temperature incubations on phytoplankton N-physiology are discussed. The inclusion of 2 nitrate transport systems (low rate, high affinity; high rate, low affinity) with different regulatory thresholds and temperature-dependent steps can be included readily in the structure of existing mechanistic models of N...