Vadose zone measurement and modeling

Hopmans, Jan W.; Clausnitzer, V.; Kosugi, Ken’ichiro; Nielsen, D. R.; Somma, F.

doi:10.1590/s0103-90161997000300004

Cited by 7 publications

(4 citation statements)

References 24 publications

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“…Green-Ampt model is generally used to assess the consistency in estimated physical parameters S and K s . Fitted parameters serve as an appropriate, compressed description of data and can be used for the predictive purposes (Hopmans, Clausnitzer, Kosugi, Nielsen, & Somma, 1997).…”

Section: Infiltration Rate (Q S ) and Model Fitted Parametersmentioning

confidence: 99%

Soil hydrological properties as influenced by long‐term nitrogen application and landscape positions under switchgrass seeded to a marginal cropland

et al. 2019

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Switchgrass (Panicum virgatum L.) has the potential to recover the soil hydrological properties of marginal lands. Nitrogen (N) and landscape position are the key factors in impacting these soil properties under switchgrass. The specific objective of this study was to investigate the responses of N rate (low, 0 kg N/ha and high, 112 kg N/ha) and landscape positions (shoulder and footslope) on near‐surface soil hydrological properties that included: infiltration rate (qs), saturated hydraulic conductivity (Ksat), bulk density (ρb), penetration resistance (SPR), water retention (SWR), pore‐size distribution (PSD), and carbon (C) and nitrogen (N) fractions under switchgrass production. Data showed that, in general, the N and landscape position significantly influenced soil hydrological properties. Higher N rate decreased ρb (1.23 and 1.36 g/cm3 at 0–5 and 5–15 cm, respectively) and SPR (1.06 and 1.53 MPa at 0–5 and 5–15 cm, respectively) at both depths and increased the qs, Ksat and Green–Ampt estimated sorptivity (S) and hydraulic conductivity (Ks) parameters, and SWR (0–5 cm depth) at 0 and −0.4 kPa matric potentials (ψm). Furthermore, footslope position significantly decreased ρb, SPR at 0–5 and 5–15 cm depths, and increased the qs, Ksat, S, Ks, and SWR (0–5 cm depth) at every ψm ranged from 0 to −30.0 kPa. The higher N rate increased the coarse mesopores (60–1,000 μm) and total pores, whereas, footslope position increased the coarse mesopores, micropores (<60 μm), and total pores. Data from this study showed that planting switchgrass with 112 kg N/ha under footslope position helped in improving the soil hydrological properties, those can be beneficial in enhancing the biomass yield under marginal lands.

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Section: Infiltration Rate (Q S ) and Model Fitted Parametersmentioning

confidence: 99%

Soil hydrological properties as influenced by long‐term nitrogen application and landscape positions under switchgrass seeded to a marginal cropland

et al. 2019

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“…t ' (Talsma, 1969). These fitted parameters serve as a convenient, condensed description of data and can be used for the predictive purposes (Hopmans et al, 1997). The initial infiltration rate (^Q) depends on the antecedent soil water content.…”

Section: Ponded Infiltration Measurementsmentioning

confidence: 99%

Long‐Term Tillage and Crop Rotations for 47–49 Years Influences Hydrological Properties of Two Soils in Ohio

Kumar

Kadono

Lal

et al. 2012

Soil Science Soc of Amer J

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Research is lacking concerning soil water retention (SWR) and infiltration rates (q^) as affected by long-term tillage and crop rotation. Thus, soil hydrological properties were measured at two long-term experimental sites near Wooster (49 yr) and Hoytville (47 yr) in central Ohio. The Wooster soil is silt loam in texture and well-drained, whereas, the Hoytville soil is clay loam in texture and poorly-drained. Tillage treatments were, no-tillage (NT), minimum-tillage (MT), and plow-tillage (PT), and crop rotations were continuous corn {Zea mays L.), and corn-soybean {Glycine max L.) in a 2-yr rotation. Soil hydrological properties were compared with those of adjacent and undisturbed woodlots (WL). The SWR characteristics indicated higher volumetric water content at almost all matric potentials (*^) under WL soils than for the three tillage systems at both sites. Among tillage treatments, soils under NT had higher SWR than those under MT and PT for all four (0-10, 10-20, 20-30, and 30^0 cm) depths. In general, long-term NT contained a higher proportion of macropores (>1000 |j,m) and micropores (<10 |xm), and hence had higher SWR than MT and PT for all depths. The q^ was 1.9 and 4.2 times higher in well-drained soils under NT as compared to those under MT and PT, respectively, and 2.1 and 4.2 times higher in poorly-drained soils. Two physical based infiltration models, Green-Ampt and Parlange, fitted the measured infiltration data well with the coefficients of determination (r^) ranging from 0.91 to 0.98, and root mean square error values from 0.06 to 0.66 mm h~\ Results support the conclusion that long-term (47-49 yr) use of NT practices in both well-drained and poorly-drained soils improves SWR, pore-size distribution, and q^ compared to PT and MT practices.

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“…The Green–Ampt and Parlange models are generally used to assess the consistency in estimated physical parameters S and K s . Fitted parameters serve as an appropriate, compressed description of data and can be used for predictive purposes (Hopmans et al., 1997).…”

Section: Methodsmentioning

confidence: 99%

Hydro‐physical soil properties as influenced by short and long‐term integrated crop–livestock agroecosystems

Dhaliwal

Kumar

2021

Soil Science Soc of Amer J

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Integration of cover crops and livestock (ICLS) in an existing corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] cropping system can be an effective strategy to improve soil physical and hydrological properties. Three on-farm long-term (≥30 yr) sites (Sites 1, 2 and 3) and one short-term (3 yr) experimental site (Site 4) with a randomized block design in eastern South Dakota were selected to evaluate the impacts of ICLS on soil physical and hydrological properties. At Sites 1, 2, and 3, the following long-term management systems were compared: ICLS (corn/grazing-soybean/grazing-cover crop/grazing), control (CNT, corn-soybean with no cover crop and no grazing), and a grazed pasture (GP). At Site 4, the treatments included ICLS (corn/grazing-soybean/grazing-oat [Avena sativa L.]-cover crop/grazing], cover crop (corn-soybean-oat-cover crop with no grazing), CNT (corn-soybean-oat without cover crop and grazing), and GP. Data showed that soil organic carbon (SOC) was higher by 20-26% and bulk density was lower by 18-37% in long-term ICLS compared with CNT. Long-term ICLS also improved soil water retention, macroporosity, infiltration rate, and total porosity compared with the CNT.However, these properties were not affected by short-term ICLS at Site 4. The GP had the lower soil bulk density and higher SOC and infiltration rate compared with ICLS and the CNT except at Site 4. This study showed that long-term integration of cover crops and livestock grazing under ICLS can be beneficial in enhancing soil physical and hydrological properties. However, whether such integration improves other soil quality parameters and crop yield requires further investigation.

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Vadose zone measurement and modeling

Cited by 7 publications

References 24 publications

Soil hydrological properties as influenced by long‐term nitrogen application and landscape positions under switchgrass seeded to a marginal cropland

Soil hydrological properties as influenced by long‐term nitrogen application and landscape positions under switchgrass seeded to a marginal cropland

Long‐Term Tillage and Crop Rotations for 47–49 Years Influences Hydrological Properties of Two Soils in Ohio

Hydro‐physical soil properties as influenced by short and long‐term integrated crop–livestock agroecosystems

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