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International Journal of Agronomy
Volume 2009, Article ID 609717, 7 pages
http://dx.doi.org/10.1155/2009/609717
Research Article

Evaluation of Pigeon Pea Lines for Biological Soil Decompaction

1Embrapa Pecuária Sudeste, Caixa Postal 339, 13560-970 São Carlos, SP, Brazil
2Centro de Energia Nuclear na Agricultura, CENA/USP, Caixa Postal 96, 13400-970 Piracicaba, SP, Brazil
3Fellow of Environmental Engeneering of FUMEP, Avenida Monsenhor Martinho Salgot 560, 13414-040 Piracicaba, SP, Brazil

Received 26 June 2009; Revised 26 November 2009; Accepted 10 December 2009

Academic Editor: Bernd Lennartz

Copyright © 2009 Rodolfo Godoy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Soil decompaction is generally achieved through mechanical cultivation practices; however biological processes can significantly add to this process through root growth, development, and later senescence. This study was carried out in Piracicaba, SP, Brazil and had the purpose of selecting, among forty one pure pigeon pea lines, the most efficient genotypes that promote soil decompaction by roots penetrating compacted soil layers. Utilizing artificially compacted 30 mm high soil blocks, in a series of experiments, these lines were compared to the cultivar Fava Larga taken as a standard. Three lines were preliminarily selected out of the initial group, and afterwards, in more detailed screenings by monitoring soil resistance to penetration and also evaluating the behavior of Tanzania grass plants seeded after pigeon pea, two of them, g5-94 and g8-95, were selected as possessing the most fit root system to penetrate compacted soil layers.