https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40196 Wed 28 Feb 2024 15:21:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41068 2SO₄-H₂O₂ digested) was the dominant P fraction (37–51% of total P) in the aerobic soil under wheat, while it was decreased by 18–27% in flooded soil under rice cultivation. In contrast, the sparingly soluble Ca-bound P (HCl-Pi) increased from 25–31% under wheat cultivation to 41–50% under flooded rice (paddy) cultivation where reducing conditions are expected to prevail under submerged paddy soil conditions. The crop rotation not only altered the sparingly available P fraction but also influenced soil labile P, especially the organic P form. Compared with the rice soil, a 4-fold increase in the labile P fraction (NaHCO₃-Po) was observed in wheat soil. The moderately labile P fraction (NaOH-extractable) showed a similar trend to that of labile P pool, but the increased NaOH-Po in wheat soil was relatively small. The relatively rapid change in the residual P fraction was attributed to oxidation-reduction cycles of Fe oxides between flooded (rice) and aerobic (wheat) soil conditions. Conclusions: Wetting and drying cycles associated with a rice-wheat crop rotation promoted the transformation of the sparingly soluble soil P fraction between crops, which was attributed to changes in soil redox conditions, particularly Fe cycling. This indicated that the rice-wheat crop rotation can draw upon the sparingly soluble P fraction for crop production, thus relying less on fertilizer-applied P.]]> Wed 28 Feb 2024 14:57:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45920 Wed 22 Mar 2023 17:37:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40301 Wed 13 Mar 2024 18:28:33 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26052 Pennisetum purpureum, Medicago sativa, Sinapis alba and Helianthus annuus) were grown separately on three different soils (CI, CNI and CTRL) in plastic pots. Two types of water (tap water and wastewater) and two loadings were applied throughout the planting period based on the field capacity (FC 100 and 150%). The overall dry matter yield was compared between the soils and treatments. Under wastewater irrigation, among the four species grown in the CI soil, P. purpureum (171 g) and H. annuus (151 g) showed high biomass yields, followed by S. alba (115 g) and M. sativa (31 g). The plants grown under tap water showed about 70% lower yields compared to the abattoir wastewater irrigation (AWW). Similar trends in the biomass yields were observed for CNI and CTRL soils under the two water treatments, with the biomass yields in the following order CI > CNI > CTRL soils. The results confirm the beneficial effects of AWW at the greenhouse level. However, a proper cropping pattern and wastewater irrigation management plan is essential to utilise the nutrients available in the wastewater-irrigated land treatment sites. The increase in fertility is evident from the effects of wastewater on biomass growth and also the abundance of nutrients accumulated in plants. A mass balance calculation on the applied, residual and the plant-accumulated nutrients over a few cropping periods will help us in understanding the nutrient cycling processes involved in the abattoir-irrigated land treatment sites, which will serve as an effective tool for the environmental management.]]> Wed 11 Apr 2018 12:50:36 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43096 Wed 07 Feb 2024 17:17:32 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48743 Wed 06 Mar 2024 14:30:49 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53284 Tue 21 Nov 2023 10:23:33 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54387 Tue 20 Feb 2024 20:45:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44358 Tue 11 Oct 2022 19:49:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29605 week 4 > week 3 > week 2. On the other hand, under the 50 % FC loading rate treatments, the highest N₂O emission was recorded in the first few weeks and in the following order: week 1 > week 2 > week 3 > week > 4. Since N₂O is a greenhouse gas with high global warming potential, its emission from wastewater irrigation is likely to impact global climate change. Therefore, it is important to examine the effects of abattoir wastewater irrigation on soil for N₂O emission potential.]]> Thu 21 Oct 2021 12:53:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:6098 Sat 24 Mar 2018 07:44:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35017 c) based on multiple published relationships. These are combined through the FAO56 methodology using gridded rainfall and two gridded reference evapotranspiration (ET_o) products to estimate actual evapotranspiration, providing six K_c - ET_o combinations which are then compared to actual/recorded irrigation volumes from test sites. The method was tested over an almond farm, two vineyards and a cotton field; in addition to Goulburn-Murray Water’s (GMW) individual farm scale sites with unknown crops, all located within Australia. The developed approach provided estimated irrigation volumes that closely matched measured data for almond and cotton farms, while vineyards returned less accurate results due to localised management techniques that do not agree with land management assumptions made. The results from GMW showed some indication of the irrigation water use, although more details of the site being assessed needs to be available (i.e. crop type and extent). This study demonstrates the ability of certain remote sensing K_c relationships for sensing irrigation water use and shows the potential applications of the developed approach in monitoring irrigation over paddock scale environments.]]> Mon 26 Jun 2023 14:59:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49251 Mon 08 May 2023 10:42:38 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33454 Fri 30 Aug 2019 09:37:45 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35122 Fri 21 Jun 2019 10:54:17 AEST ]]>