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  • The effect of high intensity radiation on plant growth in greenhouses.

    By Antonius Lecuona|Published On: April 11, 2019|Last Updated: November 30, 2021|Categories: Cultivation|Tags: Light|

    High intensity radiation is more common in equatorial regions than cold weather climates. This is because of the angle the sun rays hit the soil surface. It does not mean that the intensity of radiation is lower in South Africa than Nigeria per se. It also depends on the angle and direction of the land, [...]

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  • The effect of radiation on growth and yield

    By Antonius Lecuona|Published On: April 10, 2019|Last Updated: December 24, 2024|Categories: Cultivation|Tags: Light|

    Understanding the effect of radiation on plants will help identify weaknesses in your greenhouse.  The effect of radiation can be divided into three parts; its effect on flowering, on photosynthesis and the temperature and water loss. High light intensity is correlated with temperature and water loss. Flowering is determined by illumination levels less than 10.9 [...]

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  • lettuce mature management harvest predict head butter crisp iceberg hydroponics greenhouse

    How to predict when lettuce are ready for harvest

    By Antonius Lecuona|Published On: November 1, 2014|Last Updated: November 1, 2014|Categories: Lettuce|Tags: Light, Physiology, Temperature|

    Lets face it, lettuce is one of the fastest growing crops from transplanting to maturity. What makes it even more crucial is that the whole plant is harvested, unlike parsley or tomatoes where the harvest period can be extended. The great advantage is that more than one crop can be harvested per year, so staggering [...]

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  • The effect of light and temperature in plant growth (Advanced reading)

    By Antonius Lecuona|Published On: April 7, 2014|Last Updated: October 31, 2014|Categories: Cultivation|Tags: Light, Temperature|

    Light and temperature are two crucial factors in greenhouse hydroponics. Plants use a very small range (only about 5% of visible light) in the total spectrum that is found in the atmosphere. The rest of the incoming radiation is not used in photosynthesis or for any chemical growth process. The range that a plant uses [...]

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