Results 231 to 240 of about 11,182 (261)

Effects of temperature and application rate of a nitrification inhibitor, dicyandiamide (DCD), on nitrification rate and microbial biomass in a grazed pasture soil

Soil Research, 2004
Abstract. The nitrification inhibitor dicyandiamide (DCD) has recently been shown to be effective in reducing nitrate leaching from grazed pasture soils. The objective of this study was to determine the influence of temperature and application rate on the effectiveness of DCD in nitrification inhibition.
H. J. Di, K. C. Cameron
openaire   +1 more source

NITRIFYING GENERA IN ACTIVATED SLUDGE MAY INFLUENCE NITRIFICATION RATES

Proceedings of the Water Environment Federation, 2007
Sequencing batch reactors were acclimated under aerobic and alternating anoxic/aerobic conditions. Greater nitrification rates in the alternating reactor were investigated by comparing environmental conditions. In the alternating reactor, pH, alkalinity, oxygen, and nitrite were higher at the onset of aerobic nitrification.
M A, Dytczak, K L, Londry, J A, Oleszkiewicz   +2 more
openaire   +2 more sources

The rates of nitrification of peat soils in British Guiana

The Journal of Agricultural Science, 1954
A study has been made of some of the nitrogen fractions of the pegasse soils of British Guiana in virgin and exhausted conditions, that is, before and after cropping.1. Preliminary field experiments on the virgin and exhausted soils adduced strong evidence in support of the complaints made by farmers that the productivity in yields of the pegasse soils
H. Paul, M. A. A. Shariff
openaire   +1 more source

The effect of storms on nitrification rates in a small stream

Water Research, 1985
Abstract The impact of storms on nitrification rates was examined over a 2-month period in the Waiohewa Stream, Rotorua, New Zealand. This stream receives high concentrations of geothermally derived ammonia. Changes in mass flows of ammonium and (nitrate + nitrite)-N were used to calculate apparent nitrification rates.
R.Bruce Williamson, James G. Cooke
openaire   +1 more source

Control of nitrification rate by increasing ammonium concentration

Fertilizer Research, 1988
Lysimeter experiments with maize and incubation experiments showed that increased ammonium concentrations in soil reduced nitrification rates. A modified Lees and Quastel kinetic model was proposed for predicting the relation between initial ammonium concentration in soil and nitrification rate.
openaire   +1 more source

Laboratory and Instream Nitrification Rates for Selected Streams

Journal of Environmental Engineering, 1987
Nitrification rate coefficients are predicted from biochemical oxygen demand tests for two rivers that are moderately deep but have some shoals and riffles. The two streams studied are notable for the lack of a thick benthic community and for the low flow velocities. Measured nitrification coefficients are compared to independently derived coefficients
openaire   +1 more source

Overlooked pathways of endogenous simultaneous nitrification and denitrification in anaerobic/aerobic/anoxic sequencing batch reactors with organic supplementation

Water Research, 2023
Fan Xing, Shuohui Shi, Xuejie He
exaly  

MEASURING NITRIFICATION RATES FOR BIG PAYOUTS

Proceedings of the Water Environment Federation, 2002
H. Melcer, P. Tam Brown, P. Wokulich, J.R. Coughenour, P.L. Dold, R. Jones, C. Bye, H.D. Stensel, R. Ke   +8 more
openaire   +1 more source

A review of research progress of heterotrophic nitrification and aerobic denitrification microorganisms (HNADMs)

Science of the Total Environment, 2021
Ji Li, Wenyi Dong
exaly  

NITRIFICATION RATES IN MICHIGAN BLUEBERRY SOILS

Acta Horticulturae, 1997
Eric J. Hanson, M. Mandujano
openaire   +1 more source