Tzi-Tziboy, E.A. Dinamica do nitrogenio (15N)de material vegetal incorporado ao solo - Piracicaba, SP (Brasil): 1993. - 184 p. 44 tables; Bibliography p. 167-184 (168 ref.); Summaries (Eng, Por) Subjects--Topical Terms: SoloNitrogenioIsotopo