N fixation

Newer methods to examine N-fixation by micro-organisms... 

J. S. Duhan, S. S. Dudeja, and A. L. Khurana. Siderophore production in relation to N fixation and iron uptake in pigeon pea-Rhizobium symbiosis. Folia Microbiol. 45 421 (1998). 

Von Fragstein, P (1995) Manuring, manuring strategies, catch crops and N-fixation , Biological Agriculture and Horticulture, 11, 275-287. 

Paerl, H.W., K.M. Crocker, and L.E. Prufert. 1987. Limitation of N fixation in coastal marine waters relative importance of molybdenum, iron, phosphorus, and organic matter availability. Limnol. Oceanogr. 32 525-536. 

I MICROBIAL ACTIVITY N FIXATION NITRIF1CAYION DENITRIFICATION S INCORPORATION... 

Soil surface balance measures the differences between the input or application of nutrients entering the soil (e.g. mineral fertilisers or organic manure) and the output or withdrawal of nutrients from harvested and fodder crops. Farm gate balances measure the nutrient input on the basis of the nutrient contents of purchased material (e.g. concentrates, fertilisers, fodder, livestock, biological N-fixation) and farm sales such as meat, milk, fodder, cereals (OECD 1997). 

Martinez-Toledo, M.V., T.D.L. Rubia, J. Moreno, and J. Gonzalez-Lopez. 1988. Effect of diflubenzuron on Azotobacter mtrog n fixation in soil. Chemosphere 17 829-834. 

Steen Jensen, E. and Hauggaard-Nielsen, H. 2003. How can increased use of biological N, fixation in agriculture benefit the environment Plant and Soil 252 177-186. 

Estuary export Atmosphere N fixation wastewater sources inputs column Denitrification Sedimentation landings Other losses Net... 

Thus, despite high rates of N fixation and denitrification, primary production in Moreton Bay is P limited (Eyre and McKee, 2002). 

Bebout, B.M., Paerl, H.W., Bauer, J.E., Canfield, D.E., and Des Marais, DJ. (1994) Nitrogen cycling in microbial mat communities the quantitative importance of N-fixation and other sources of N for primary productivity. In Microbial Mats (Lucas, J., and Caumette, P., eds.), pp. 32-42, Springer-Verlag, Berlin. 

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