Microspatial variability and sampling concepts in soil porosity studies of vertisols

Puentes, Rodrigo; Wilding, L. P.; Drees, L. R.

doi:10.1016/0016-7061(92)90065-f

Cited by 16 publications

(3 citation statements)

References 11 publications

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“…Root growth of Lc and Lt would have been affected by the fine texture and high microporosity of the Vertisol (Puentes et al, 1992), thus preventing the same growth that plants achieved in the Andisol, and exhibiting particular physical, chemical, and microbiological properties. These properties facilitate optimal development of deep roots in both species (Rahman et al, 2008).…”

Section: Shoot and Root Dmmentioning

confidence: 99%

Phosphorus absorption and use efficiency by Lotus spp. under water stress conditions in two soils: A pot experiment

Castillo¹,

Acuña

Zagal³

et al. 2013

Chilean J. Agric. Res.

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The response to P and water deficiencies of forage Lotus species has not been sufficiently studied in the Andisol and Vertisol soil orders in Chile's marginal areas. A pot experiment under cover was carried out between October 2007 and March 2008 to study the effects of P and soil water availability (SWA) on DM production, P absorption, and P use efficiency in Lotus spp. The experiment included three Lotus (L. corniculatus L., L. tenuis Waldst. & Kit. ex Willd., and L. uliginosus Schkuhr) species, two soils (Andisol and Vertisol), two contrasting P levels (low and high), and two SWA levels (10% and 100%). A completely randomized design with a 3 × 2 × 2 × 2 factorial arrangement with four replicates was used. Accumulated shoot and root DM, P absorption and efficiency, and arbuscular mycorrhizal (AM) colonization were measured. Phosphorus absorption was significantly higher in Andisol with 100% SWA and high P in the three species, which was reflected in P efficiency where the species exhibited higher P absorption efficiency (PAE) and P utilization efficiency (PUE) with low P, and mean of the three species with low P and high SWA. When the P level was low, L. uliginosus showed the highest PAE and L. corniculatus exhibited the highest PUE. Phosphorus efficiency was also influenced by AM colonization since on the average mycorrhization in the three species was significantly higher in the low P treatments. Differences existed among species for DM production, response to P, P absorption, PAE, and PUE.

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Section: Shoot and Root Dmmentioning

confidence: 99%

Phosphorus absorption and use efficiency by Lotus spp. under water stress conditions in two soils: A pot experiment

Castillo¹,

Acuña

Zagal³

et al. 2013

Chilean J. Agric. Res.

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“…Soil cracking behavior in Vertisols is particularly complex because Vertisols can form their own microtopography, gilgai, which consists of circular mounds or linear ridges and depressions. This gilgai affects the shrink-swell soil properties at microscopic and pedon scales and consequently at the landscape scale (Puentes et al, 1992;Coulombe et al, 1996a). In humid climates and relatively fl at landscape, such as in the Texas Gulf Coast Prairie, formation of round gilgai is most typical (Nordt et al, 2004).…”

mentioning

confidence: 99%

Vertisol Crack Extent Associated with Gilgai and Soil Moisture in the Texas Gulf Coast Prairie

Kishné

Morgan

Miller

2009

Soil Science Soc of Amer J

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Long‐term observations of in situ crack formation and closure in shrink‐swell soils are rare, but important to understanding hydrology in shrink‐swell soils. To analyze spatial and temporal variability of crack development in a Vertisol with gilgai, soil cracks were measured on a 100‐m2 area of Laewest clay (fine, smectitic, hyperthermic Typic Hapludert) with native tallgrass vegetation on 42 dates from 1989 to 1998. Our objectives were to (i) report the distribution of Vertisol cracking across gilgai microtopography; (ii) estimate crack depth as a function of crack width considering gilgai; (iii) investigate the relationship of surface cracking and soil moisture considering gilgai and hysteresis. All surface cracks were mapped on scaled diagrams with width categorized, and some crack depth measured. Gravimetric soil moisture corresponding to crack measurements was measured on 18 dates, and on an additional 32 dates without crack measurements. Drying, wetting, and uniform soil moisture conditions were classified from the difference in soil moisture from 10‐ to 25‐cm depths. Microtopography was quantified using a digital elevation model. Results showed that crack area density was greatest on microhighs and microslopes, though microlows had the largest cracking potential. The linear correlation between crack depth and width was moderately strong (r2 = 0.5), and not affected significantly by gilgai and hysteresis. However, taking hysteresis into account improved the linear regression models of crack area density versus soil moisture (up to r2 = 0.69) on both microhighs and microlows. Antecedent soil moisture seemed to impact in situ crack area density. Further field studies are recommended.

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“…(1981), Armstrong (1982), Dunn (1983), Horowitz & Hillel (1983), Mc Bratney & Webster (1983e 1986, Baker (1984), Cressie (1985), Issaks & Srivastava (1988), Barnes (1991), Shapiro & Botha (1991), Goyway & Hartford (1996), Tsegaye & Hill (1998) (Bresler et al, 1984;Ciollaro & Romano, 1995;Rogowski & Wolf, 1994e Gupta et al, 1995, retenção de água (Burden & Selim, 1989;Voltz & Goulard, 1994;Folegati, 1996e Mallants et al, 1996, propriedades físicas dos solos (Borgelt et al, 1994;Horn et al, 1994e Ribeiro Jr., 1995, porosidade do solo (Puentes et al, 1992), resistência à penetração (Moolman & Van Huysstem, 1989e Ley & Laryea, 1994, nível do lençol freático (Aboufirassi & Marino, 1983), drenagem em solos salinos (Agrawal et al, 1995), salinidade do lençol freático (Hooda et al, 1986e Samra et al, 1989, contaminação do lençol (Reynolds et al, 1994), acidez do solo (Boyer et al, 1996), resistência e plasticidade (Alli et al, 1990) e processos erosivos (Cremers et al, 1996), etc.…”

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Modelagem Da Profundidade Secchi E Da Concentração De Clorofila a No Estuário Do Rio Anil, São Luís-Ma

Alcântara¹,

Mochel²,

Amorim³

et al. 2004

RCG

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A geoestatística é um tópico especial da estatística aplicada que trata de problemas referentes às variáveis regionalizadas, aquelas que tem comportamento espacial mostrando características intermediárias entre as variáveis verdadeiramente aleatórias e as totalmente determinísticas. O presente trabalho teve com objetivo modelar através da geoestatística, dados de profundidade secchi e concentração de clorofila a, utilizando a krigagem de bayes (modelo esférico) e o pacote SPRING 4.0.

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Microspatial variability and sampling concepts in soil porosity studies of vertisols

Cited by 16 publications

References 11 publications

Phosphorus absorption and use efficiency by Lotus spp. under water stress conditions in two soils: A pot experiment

Phosphorus absorption and use efficiency by Lotus spp. under water stress conditions in two soils: A pot experiment

Vertisol Crack Extent Associated with Gilgai and Soil Moisture in the Texas Gulf Coast Prairie

Modelagem Da Profundidade Secchi E Da Concentração De Clorofila a No Estuário Do Rio Anil, São Luís-Ma

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