אסיף מאגר המחקר החקלאי

Nitrogen extraction from the soil by a soybean crop [Balance de nitrogeno en un suelo cultivado con soja]

Year:

1995

Source of publication :

Authors :

Volume :

13

Co-Authors:

Alvarez, R., Lab de Radioissotopos, Univ de Buenos Aires, Av. San Martin4453, Buenos Aires, Argentina
Lemcoff, J.H., Lab de Radioissotopos, Univ de Buenos Aires, Av. San Martin4453, Buenos Aires, Argentina
Merzari, A.H., Lab de Radioissotopos, Univ de Buenos Aires, Av. San Martin4453, Buenos Aires, Argentina

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Abstract:

Uses the A value methodology, employing a non nodulating isoline as control crop in an Argiudoll of the Southeast of the Buenos Aires Province (Argentina). Nitrogen derived from the atmosphere accounted for ca. 40% of total plant nitrogen while fixed nitrogen was ca. 46-51 kg N ha-1 for two soybean cultivars. Grain nitrogen derived from the soil ranged between 53 and 62 kg ha-1, meanwhile straw incorporated ca. 8-10 kg N ha-1 from the atmosphere. Thus, a negative balance of 44-51 kg N ha-1 was estimated for the soil-plant system. -from English summary

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