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Morphological characteristics of soybean root apexes as indicators of soil compaction Scientia Agricola
Ramos,Julio César; Imhoff,Silvia Del Carmen; Pilatti,Miguel Ángel; Vegetti,Abelardo Carlos.
Plant soil compaction poses a serious problem to agriculture because it produces different types of changes in plant characteristics. No method has been implemented to date to use root morphological changes as indicators of soil compaction levels. Therefore, the aim of the present study was to evaluate whether or not the morphological changes in root apexes of soybean (Glycine max (L.) Merrill) can be used as indicators of soil compaction levels. To this end, a silt-loamy soil material (from a Typic Argiudoll, Esperanza series), sieved through a 2 mm mesh was used and the following soil bulk density levels were determined: 1.1, 1.3 and 1.5 g cm³ for which the corresponding mechanical resistances were < 0.1, 0.5 and 3.5 MPa, respectively. The distance...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Mechanical impedance; Root indicator; Root hair.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600013
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Soil physical quality of Mollisols quantified by a global index Scientia Agricola
Ghiberto,Pablo Javier; Imhoff,Silvia; Libardi,Paulo Leonel; Silva,Álvaro Pires da; Tormena,Cassio Antonio; Pilatti,Miguel Ángel.
Indicators synthesizing the state of the structural quality and the function of the porous system are useful for assessing soil production capacity as well as the way it may serve natural ecosystems. This research aimed (i) to determine indicators of the state and function of the porous system, (ii) to use them to derive a global index to characterize the soil physical quality, and iii) to establish a reference pore-size distribution curve for Mollisols from the province of Santa Fe (Argentina). Sixty water retention curves (WRC) of A and B horizons of Mollisols, with clay varying between 119 and 538 g kg−1, organic matter between 5 and 40 g kg−1, and soil bulk density between 1.09 and 1.49 Mg m−3, were used. The indicators measured were: pore size...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water release curve; Silty-loam; Macropore; Soil management.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200167
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