@article{article2f9a3da6,
title   = {Estimation of N2 -fixation by sugarcane, Saccharum sp., and soybean, Glycine max, grown in soil with 15 N-labelled organic matter},
author = {Freitas, J. R. de and Victoria, Reynaldo Luiz and Ruschel, Alaides Puppin and Vose, Peter B},
year = {1984},
doi = {10.1007/bf02220252},
journal   = {Plant and Soil}
}