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| Fernandes,Carolina; Corá,José Eduardo. |
| Change on substrate bulk density during the growing period may negatively affect other substrate physical properties and, consequently, plant growth. The objectives of this research were 1) to characterize physical properties of two horticultural substrates (S1 and S2), 2) to evaluate the effect of different bulk densities values of those substrates on their air/water relationship, and 3) to develop mathematical functions to estimate the air/water relationship by increasing substrates bulk density value. First, the distribution of particles size, the bulk density, and the water release curve of the substrates were determined. Then, substrates were packed with three different bulk density values, i.e. 10% (D1), 20% (D2) and 30% (D3), higher than the bulk... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Particle size distribution; Substrate bulk density; Water release curve; Regression equation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400015 |
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| BACCHI,O.O.S.; REICHARDT,K.; VILLA NOVA,N.A.. |
| Fractal scaling has been applied to soils, both for void and solid phases, as an approach to characterize the porous arrangement, attempting to relate particle-size distribution to soil water retention and soil water dynamic properties. One important point of such an analysis is the assumption that the void space geometry of soils reflects its solid phase geometry, taking into account that soil pores are lined by the full range of particles, and that their fractal dimension, which expresses their tortuosity, could be evaluated by the fractal scaling of particle-size distribution. Other authors already concluded that although fractal scaling plays an important role in soil water retention and porosity, particle-size distribution alone is not sufficient to... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Fractal; Particle size distribution; Pore size distribution; Soil water retention; Soil hydraulic conductivity. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000200027 |
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| Beretta,Andrés N; Silbermann,Ana V; Paladino,Leonardo; Torres,Deborah; Bassahun,Daniel; Musselli,Raquel; García-Lamohte,Adriana. |
| A.N. Beretta, A.V. Silbermann, L. Paladino, D. Torres, D. Bassahun, R. Musselli, and A. García-Lamohte. 2014. Soil texture analyses by hydrometer: modifications of the Bouyoucos method. Cien. Inv. Agr. 41(2): 263-271. The Robinson pipette method (Pipette) is accurate and precise but time consuming. Bouyoucos (1936) proposed a more rapid and simpler procedure called the hydrometer method. Both analytical techniques are sedimentation procedures accepted as standard techniques for particle-size analysis. The sand, silt, and clay contents of several soil samples were determined using the Pipette method as a control and compared with the Bouyoucus, the Bouyoucos Modified (Bouyoucos_M) and the Bouyoucos Modified with gravimetric determination of the sand content... |
| Tipo: Journal article |
Palavras-chave: Particle sedimentation; Particle size distribution; Pipette method. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200013 |
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