A Comparison of 15N-Depleted and 15N-Enriched Fertilizers as Tracers1
- J. L. Starr,
- F. E. Broadbent and
- P. R. Stout2
(14NH4)2SO4 from which virtually all 15N had been removed was compared as a tracer with (NH4)2SO4 containing 8.95% 15N excess in a plant uptake experiment using soil columns maintained at ⅓ bar tension and conventional greenhouse pots. Uptake of fertilizer nitrogen in three cuttings of ryegrass (Lolium Perenne L.) was identical with the two fertilizers.
Estimates of residual fertilizer N in the pots agreed less closely, owing to the high dilution factor.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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