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References: Passive and Basic Active Systems

  1. Deep-water culture - Wikipedia - Detailed description of DWC hydroponic systems, explaining reservoir design, net pot placement, air pump aeration, and the advantages of continuous root immersion in oxygenated nutrient solution.

  2. Nutrient film technique - Wikipedia - Covers NFT system design with sloped channels, thin-film flow rates, pump sizing, and the crop types best suited to this high-efficiency but pump-dependent growing method.

  3. Aeroponics - Wikipedia - Explains aeroponics root-misting technology, nozzle specifications, misting intervals, and its advantages in oxygen delivery and water efficiency relative to DWC and NFT systems.

  4. Hydroponic Food Production (7th ed.) - Howard M. Resh - CRC Press - Comprehensive system-by-system comparison of Kratky, DWC, NFT, ebb-and-flow, drip, and aeroponic configurations with design specifications and crop suitability guides.

  5. Hydroponics: A Practical Guide for the Soilless Grower - J. Benton Jones Jr. - CRC Press - Practical treatment of system selection criteria including budget, crop type, operator skill level, and failure-mode risk tolerance for each major hydroponic architecture.

  6. USDA: Controlled Environment Agriculture - USDA National Agricultural Library - Curated bibliography of research on greenhouse and hydroponic system types, covering system performance data across lettuce, tomato, herb, and fruiting crop experiments.

  7. EPA: Water Efficiency in Agriculture - EPA - Data on water consumption comparisons between conventional field agriculture and recirculating hydroponic systems; supports understanding of water reuse in closed-loop DWC and NFT systems.

  8. NASA Veggie System - NASA - Documents the passive Veggie plant growth system used on the ISS, a simplified hydroponic approach that informs the Kratky and passive-wick design principles covered in this chapter.

  9. Khan Academy: Fluid Pressure - Khan Academy - Physics of fluid pressure and flow relevant to understanding pump head calculations, gravity-fed system design, and the flow dynamics in NFT channels and ebb-and-flow flood tables.

  10. MIT OCW: Fluid Mechanics - MIT OpenCourseWare - Engineering fluid mechanics course covering flow rates, pipe sizing, and pump selection — directly applicable to designing NFT channels, drip systems, and reservoir plumbing in active hydroponic systems.