Irrigation

The changes also improve clarity and flow while maintaining the technical depth: This self-paced learning module explores the critical aspects of irrigation within the Integrated Aqua-Vegeculture System (iAVs). Through guided reading from the iAVs Handbook and an interactive quiz, you will develop a deeper understanding of the principles and practices that underpin effective irrigation in iAVs.

Key topics include:

• The principles of intermittent flood-and-drain irrigation and how this method balances water delivery with aeration to support plants and microbes.
• How iAVs irrigation differs from traditional surface irrigation and how it is uniquely adapted for sand biofilters.
• The role of irrigation in creating optimal conditions for plant roots and microbial communities by delivering water, oxygen, and nutrients.
• The importance of well-draining sand to ensure full pore volume recharge with air, which supports aerobic microbial activity essential for system health.
• Timing irrigation during daylight hours to align with peak photosynthetic activity, when plants actively absorb water and nutrients.
• The significance of proper drainage in maintaining rhizosphere and microbial health by supplying oxygen for cellular respiration, enabling microbes to process organic matter.
• Night-time irrigation considerations, why it is not recommended, and the risks associated with excessive moisture during these hours.
• Managing water velocity and preventing preferential flow paths to ensure even water distribution and avoid channeling.
• Customizing irrigation cycles, including the timing and duration of flood-and-drain events, based on the specific needs of your iAVs.
• Designing and implementing an effective slit drain, the recommended drain outlet for iAVs.
• The importance of proper plumbing materials to ensure smooth water movement, prevent leaks, and support long-term system durability.
• Establishing baseline drainage conditions and fine-tuning irrigation parameters to optimize system efficiency and effectiveness.
• By completing this module, you will gain the foundational knowledge needed to manage irrigation effectively in your iAVs, ensuring robust plant growth, healthy microbial communities, and efficient system operation.