relation: https://eprints.nwisrl.ars.usda.gov/id/eprint/451/
title: Fixation of Isotopic Nitrogen on a Semiarid Soil by Algal Crust Organisms
creator: Mayland, H.F.
creator: McIntosh, T.H.
creator: Fuller, W.H.
subject: Nitrogen
subject: Mass Import - autoclassified (may be erroneous)
description: Semiarid desert algal crust organisms were found to fix N2 when exposed to an atomosphere which contained isotopically enriched N. Significant quantities of the N isotope were detected in the total crust N after 3 days of incubation under field-simulated conditions.  Net N2 fixation rates by the algal crust organisms were 0.16 and 0.10 lb of N/acre of crust surface per day under continuous wet and cycling wet-dry conditions, respectively. Net fixation of N under field-simulated conditions adequately compensated for the removal of N by livestock. The rate of N2 fixation under field-simulated conditions increased linearly for at least 520 days. The amount of N in the algal crust was doubled during this time. No net N change was observed in dry crusts.  Growing algal crusts contained 1% to 2% of the total N as extracellular NH4-N. Excretion of some fixed nitrogen was suggested by the isotopic enrichment of the extracellular N fraction and uptake of labeled N by grass seedlings (Artemesia sp.) growing on incubated crusts.
date: 1966
type: Article
type: NonPeerReviewed
format: application/pdf
language: en
identifier: https://eprints.nwisrl.ars.usda.gov/id/eprint/451/1/56.pdf
identifier:   Mayland, H.F. and McIntosh, T.H. and Fuller, W.H.  (1966) Fixation of Isotopic Nitrogen on a Semiarid Soil by Algal Crust Organisms.   Soil Science Society of America Proceedings.      30(1):56-60.               
relation: 0056
identifier: 0056