Understanding the greenhouse environment
The protected greenhouse environment The greenhouse environment is designed to allow plants to perform close to their genetic optimum so that the grower achieves maximum...
Tag Archives: Temperature
Heating nutrient solution increases growth rate of tomatoes
Heating the nutrient solution in order to increase growth rate can provide growers an edge over competitors. This applies to all business categories. Heating up the...
How to predict when lettuce are ready for harvest
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...
Nutrient uptake of cucumbers depends on light intensity and air temperature
When it comes to fertigation programmes or recipes, most commercial growers have a good indication of what is required. The nutrient program is either obtained...
The effect of light and temperature in plant growth (Advanced reading)
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...
Ideal temperature and humidity regime for greenhouse crops
Temperature and humidity regime for peppers. Temperature and humidity go hand in hand. Quite often increasing the one has an effect of the other. So...
Lime – a cheap way to reduce greenhouse temperatures
Cooling a greenhouse can be just as expensive as heating, well almost. There are some very practical methods that you can use to save money. ...
Insect screens in greenhouses – effective biological control
Insect screens or thermal screens are designed to reduce heat in summer and increase temperatures during the night, but also to reduce the number of insects entering the...
Thermal screens greenhouse cooling – are they effective
Heat is always a problem in greenhouses during summer months and even during winter in some areas. Extreme high temperatures cause stress in plants and...
Cooling a greenhouse with evaporative pad-and-fan
Pad-and-fan systems, also called evaporative pad-and-fan systems, is the most common method of cooling a greenhouse in warm weather regions. Although not optimal, it is better...
Cooling a greenhouse with fogging nozzles
Many growers have tried reducing temperatures (cooling) with fogging nozzles. The concept of spraying the air with microscopic water droplets which absorb the heat in the...
Natural ventilation of single span tunnels in arid regions.
Arid regions are characterized by low rainfall, low humidity and high temperatures during summer. The largest problem is temperature during the day time inside the...
Manage the root temperature in growth bags for optimal growth
Root temperature does play an essential part in plant growth. It influences plant dry-mass, uptake of nitrogen, phosphorus and potassium. Root zone temperatures between 18–22°C...
