Tag: sand
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Module 3 – Design
Design Every iAVs is identical to another in terms of its basic component parts and operating method – from a square metre to a million square metres. We’ve provided three system designs – each of them authentic iAVs – with the only difference being their size. It all comes down to your needs, preferences and…
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Module 1 – Sand
Sand No Sand – No Civilisation Sand is a benign substance that resides in the back of our minds. For most of us, it holds no more day-to-day interest than the rocks and roads – and the other physical aspects of our environment. We know that it exists but it hardly warrants a thought. But,…
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Orientation
Orientation This section sets the food security scene and provides the necessary background for the practical modules to follow. Introduction In late 2022, the practical reality of that is already playing out as famine grips large parts of Africa. Millions are starving…right now! And the situation is worsening by the day as Russia and Ukraine (two…
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Introductory Course Objectives & Overview
How to Build and Operate an iAVs Sandgarden Course Objectives: Upon successful completion of this program you will be able to: Relate iAVs key heritage milestones. Describe what an iAVs sandgarden is – and how it works. Describe the advantages of its utilisation. Source the key materials and components. Design a layout based on your…
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Irrigation Water Management: Irrigation Methods – Furrow Irrigation
CHAPTER 3. FURROW IRRIGATION Furrows are small, parallel channels, made to carry water in order to irrigate the crop. The crop is usually grown on the ridges between the furrows (Figures 23 and 24). 3.1.1 Suitable crops Furrow irrigation is suitable for many crops, especially row crops. Crops that would be damaged if water covered…
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A sandponics comparative study investigating different sand media based integrated aqua vegeculture systems using desalinated water – abstract only
A sandponics comparative study investigating different sand media based integrated aqua vegeculture systems using desalinated water Hani Sewilam 1, Fahad Kimera 2, Peter Nasr 3, Mahmoud Dawood 4 Affiliations expand PMID: 35773314 PMCID: PMC9247079 DOI: 10.1038/s41598-022-15291-7 Free PMC article Abstract This study investigated the utilization of fish effluents as irrigation water and nutrient sources to close the crop yield gap and increase Swiss chard productivity in…
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Microbial community analysis of biofilters reveals a dominance of either comammox Nitrospira or archaea as ammonia oxidizers in freshwater aquaria
may not be relevant to iAVs and doesn’t have info on amommox Microbial community analysis of biofilters reveals a dominance of either comammox Nitrospira or archaea as ammonia oxidizers in freshwater aquaria View ORCID ProfileMichelle M. McKnight, View ORCID ProfileJosh D. Neufeld doi: https://doi.org/10.1101/2021.11.24.468873 This article is a preprint and has not been certified by peer review [what does this mean?].…
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Biological nutrient removal by recirculating aquaponic system: Optimization of the dimension ratio between the hydroponic & rearing tank components
Biological nutrient removal by recirculating aquaponic system: Optimization of the dimension ratio between the hydroponic & rearing tank components Author links open overlay panelSu Shiung Lam a c, Nyuk Ling Ma b, Ahmad Jusoh a, Mohd Azmi Ambak c Show more Add to Mendeley Share Cite https://doi.org/10.1016/j.ibiod.2015.03.012Get rights and content Abstract Marble goby (Oxyeleotris marmorata Bleeker) was cultured in a recirculating aquaponic system (RAS) containing a hydroponic tank grown with…
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What Are Soils?
Soil is… a Recipe with Five Ingredients Soil is a material composed of five ingredients — minerals, soil organic matter, living organisms, gas, and water. Soil minerals are divided into three size classes — clay, silt, and sand (Figure 1); the percentages of particles in these size classes is called soil texture. The mineralogy of soils is diverse. For example, a…
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Nitrification in rapid sand filter: phosphate limitation at low temperatures – unprocessed
In winter 1995-1996 the RSF of AWS River-Lake Waterworks suffered from ammonium breakthrough. Research indicated that the nitrification was limited by stagnated growth of the nitrifying bacteria due to low phosphate concentrations at low temperatures (0-3°C). Phosphoric acid was dosed prior to the RSF (dose 35-50 μg PO43- -P.l-1) to stimulate bacteria growth. Two weeks after…