Natural enrichment of 15N during decomposition of plant material in soil

Current Perspectives in Nitrogen Fixation

1982 • 587 citations

The absolute abundance of the nitrogen isotopes in the atmosphere and compressed gas from various sources

1958 • 318 citations

Estimate of symbiotically fixed nitrogen in field grown soybeans using variations in15N Natural abundance

1979 • 148 citations

THE PRECISION OF DETERMINATIONS OF THE NATURAL ABUNDANCE OF NITROGEN-15 IN SOILS, FERTILIZERS, AND SHELF CHEMICALS

1974 • 118 citations

Variations of Nitrogen-15 Abundance in Soils

1964 • 108 citations

Ecological aspects of nitrogen fixation by Purshia tridentata

1977 • 57 citations

Natural abundance of 15N in root nodules of soybean, lupin, subterranean clover and lucerne

1983 • 42 citations

Nitrogen isotope ratios in surface and sub-surface horizons of new zealand improved grassland soils

1981 • 33 citations