A nation that can't control its energy sources can't control its future. Barack Obama
  • Here is presentation given by Dutch consultants on the 29th January. Growers who attended this event heard how the drive to save energy, and to grow more sustain-ably, was seeing fundamental changes to glasshouse cropping practices in the Netherlands.
  • A presentation given by Farm Energy Centre's Tim Pratt at the TGA's 2013 Conference, on 26th September.
  • Common practice is to put measuring boxes in a position that is both practically convenient and which provides representative measurements of the conditions in the greenhouse.
  • This article explains some set points you can use with your climate control computer to control when your greenhouse screens open and close in relation to time of day and light level..
  • Avoiding condensation on plants is a key part of any disease control strategy. Poinsettia growers have to pay particular attention to this problem as they use a technique to control plant height called ‘Drop’. ‘Drop’ involves reducing the greenhouse temperature to as low as 12 degrees C before sunrise and is followed by an increase in the greenhouse temperature to the daytime set point within one hour after sunrise.
  • Reducing minimum pipe temperature settings is a good way to save energy. However, this must be done alongside well considered ventilation settings to ensure that heating requirements are minimised.
  • When growing greenhouse crops, it’s sometimes desirable to use a little more heat than strictly necessary to maintain adequate growing conditions. The purpose of this is to keep conditions comfortably away from those which could, for instance, trigger a disease problem.
  • Because supplementary lights also produce heat, they can have a sudden impact on the temperature balance of a greenhouse when they are turned on.