During the design and assessment of pumping systems, one of the factors that must be taken into account is the effect of cavitation on pump efficiency. Cavitation is a phenomenon where, under certain conditions, vacuum bubbles are created within the pump, leading to increased pump … Continued
The RADS program had a strong technology focus and information generated aimed to: • Identify and test component tools and technology that improve water management strategies. • Assess the effect of precision irrigation on crop response and system performance. • Introduce … Continued
Case Study Highlights: Irrigation Pump Annual Energy Cost Reduction: 83% Irrigation Pump Energy Efficiency Improvement: 47% Estimated Payback Period: 21 days
It seems that the higher irrigation frequency improved the biomass production but did not affect the quality of harvested flowers and consequently increased the greenhouse water use efficiency.
Case Study Highlights: Improved productivity of 50% Improvement in water and energy use 11.9%
Kely messages: • All good irrigation design starts at the end. • First, calculate the maximum amount of water that needs to be applied. • Then, decide on the time period within which the water needs to be applied. • Make allowances … Continued
Key messages: • After determining the flow rate required to meet crop water use, the next step is selecting the emitter. • A hydraulic analysis helps in determining the size of pipes required for sufficient pressure. • The speed that water flows … Continued
Addresses misconceptions involving mixes and substrates, misconceptions regarding the efficacy of chemicals, misconceptions about watering practices, misconceptions about controlled release fertilisers (CRFs) and, last but not least, misconceptions about water pH and its effect on soil pH.
After discussing the results of the first assessment with Stuart, it was decided that flow rates could be increased by combining irrigation stations. During the following 12 months, Stuart trialled combinations of stations, and found that three stations could be run together, … Continued
Irrigation scheduling is about matching the duration of an irrigation event to plant needs, taking into account the factors of plant growth phase, rainfall and climate as well as the infiltration rate of the soil or growing medium.