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, [...]

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 [...]

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 [...]