As South African farmers face increasing water quality challenges, understanding and implementing effective filtration and water management strategies will be key to sustaining productivity and protecting precious water resources.
Dexter Neethling, product manager at Netafim South Africa, discusses the declining quality of irrigation water and the crucial role of filtration as well as standards in maintaining effective agricultural practices.
“Water quality is important because it plays a big role in your decision-making process for your design,” says Neethling.
He explains that water quality, defined by its physical, chemical, and biological properties, influences several factors. These include crop sustainability, the choice of irrigation systems, the risk of emitter clogging, filtration needs, and fertigation requirements.
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Classification of water quality
Neethling categorises water quality into four classes: good, average, poor, and extreme. These classifications depend on the total suspended solids in the water, measured in parts per million (ppm).
“It ranges from 0 to 50 ppm for good water quality to 150 to 200 ppm for extreme water quality,” he explains.
The classification directly impacts filter selection. For example, filters used for good-quality water can handle a higher flow rate compared to those required for poor-quality water. If the wrong filter is selected, it will back flush more frequently, leading to greater wear and tear, higher maintenance costs, and reduced irrigation efficiency.
“Your filtration is the only protection you have for your entire irrigation system,” Neethling stresses, emphasising the need for correct filter selection and adherence to standards. Proper filtration ensures that the system operates optimally, delivering precise amounts of water and nutrients. This not only protects the irrigation infrastructure but also supports crop health and productivity.
In this episode, Neethling also discusses:
- Practical water management;
- Seasonal and long-term water quality challenges;
- Staying informed and proactive.
Want to know more? Dive deeper into the episode and gain insights from the award-winning Farmer’s Inside Track, officially recognised as Africa and the world’s best podcast at the 2024 Digital Media Awards presented by WAN-IFRA, the global press organisation.
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