https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41361 Wed 28 Feb 2024 15:22:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47428 Wed 28 Feb 2024 15:19:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41359 Wed 28 Feb 2024 15:19:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31926 K_s) was assessed on a loam soil tilled by chisel plough. Soil sampling was conducted in the inter row area of six vineyards, which differed by the age from planting: 0 (Age 0; just planted), 1, 3, 6, 13, and 25 years (Age 1, Age 3, Age 6, Age 13, and Age 25, respectively). The One Ponding Depth (OPD) approach was applied to ring infiltration data to estimate soil K_s with an α* parameter equal to 0.012 mm^-1. Soil bulk density for Age 0 was about 1.5 times greater than for Age 25, i.e., the long-term managed vineyards. Saturated hydraulic conductivity at Age 0 was 86% less than at Age 25. The planting works were considered a major factor for soil compaction and the reduction of hydraulic conductivity. Compared to the long-term managed vineyards, soil compaction was a very short-term effect given that BD was restored in one year due to ploughing. Reestablishment of K_s to the long-term value required more time.]]> Mon 23 Sep 2019 14:07:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32351 fs, of an unmanaged field affected by fire by means of single-ring infiltrometer runs and the use of transient and steady-state data analysis procedures. Sampling and measurements were carried out in 2012 and 2017 in a fire-affected field (burnt site) and in a neighboring non-affected site (control site). The predictive potential of different data analysis procedures (i.e., transient and steady-state) to yield proper K_fs estimates was investigated. In particular, the transient WU1 method and the BB, WU2 and OPD methods were compared. The cumulative linearization (CL) method was used to apply the WU1 method. Values of K_fs ranging from 0.87 to 4.21 mm·h^-1 were obtained, depending on the considered data analysis method. The WU1 method did not yield significantly different K_fs estimates between the sampled sites throughout the five-year period, due to the generally poor performance of the CL method, which spoiled the soil hydraulic characterization. In particular, good fits were only obtained in 23% of the cases. The BB, WU2 and the OPD methods, with a characterization based exclusively on a stabilized infiltration process, yielded an appreciably lower variability of the K_fs data as compared with the WU1 method. It was concluded that steady-state methods were more appropriate for detecting slight changes of K_fs in post-fire soil hydraulic characterizations. Our results showed a certain degree of soil degradation at the burnt site with an immediate reduction of the soil organic matter and a progressive increase of the soil bulk density during the five years following the fire. This general impoverishment resulted in a slight but significant decrease in the field-saturated soil hydraulic conductivity.]]> Mon 23 Sep 2019 13:14:44 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47502 Mon 23 Jan 2023 12:08:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41042 Mon 18 Mar 2024 15:09:19 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35688 Glycine max) plantation to better understand when this technique stops being effective and starts causing a threat to soil health and quality. Therefore, we compared values of several soil properties and the soybean yield on treated fields at 10 random points belonging to 7 different plots that were treated with the liquid swine manure over a period ranging from 0 to 15 years. The results showed a positive linear trend in soybean production from 2.45 to 3.08 Mg ha^-1 yr^-1. This positive trend was also recorded for some key soil parameters such as porosity and exchangeable cations content (Ca, Mg, K, and Al). Additionally, positive effects were also found for organic matter content after 10 years of application. Our findings suggest that the use of liquid swine manure has a positive effect on soybean yield and improves soil quality, particularly on mixed farms where pigs are intensively raised nearby cultivated fields.]]> Fri 25 Oct 2019 11:35:18 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34027 Fri 01 Feb 2019 13:10:56 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34028 Fri 01 Feb 2019 13:10:56 AEDT ]]>