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Aggregation agents and structural stability in soils with different texture and organic carbon contents Scientia Agricola
Carrizo,María Eugenia; Alesso,Carlos Agustín; Cosentino,Diego; Imhoff,Silvia.
The flat pampas in the state of Santa Fe in Argentina have soils with high silt content, variable carbon content, and diverse degrees of structural degradation. Aggregate stability has been used as an indicator of the structural condition of the soil. This study aimed to quantify the effect of the addition of crop residues and root activity on the agents of aggregation and mechanisms of aggregate breakdown in soils with different carbon contents and textures cultivated under no-till. An experimental trial was conducted on a loamy soil (Typic Hapludoll, Santa Isabel series) and a silty soil (Typic Argiudoll, Esperanza series) under controlled conditions for 112 days with the following treatments: (i) with and without wheat plant growth and (ii) with and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glomalin; Carbohydrates; Crop residues; Active roots.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100075
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Root system distribution of sugar cane as related to nitrogen fertilization, evaluated by two methods: monolith and probes Rev. Bras. Ciênc. Solo
Otto,Rafael; Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo; Vitti,André Cesar.
Few studies on sugar cane have evaluated the root system of the crop, in spite of its importance. This is mainly due to the difficulty of evaluation and high variability of results. The objective of this study was to develop an evaluation method of the cane root system by means of probes so as to evaluate the mass, distribution and metabolically active roots related to N fertilization at planting. For this purpose, an experiment was conducted in an Arenic Kandiustults with medium texture in Jaboticabal/SP, in a randomized block design with four replications and four treatments: control (without N) and 40, 80 and 120 kg ha-1 of N applied in the form of urea in the planting furrow of the cane variety SP81 3250. One week before harvest, a urea-15N solution...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Active roots; Root sampling methods.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000300013
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