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Floriculture & Greenhouse Crop Production

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  • Light Management in Controlled Environments

    Published on December 23, 2016
    light management in controlled environments

  • Moving Indoors

    Published on December 8, 2017
    How does light quality, light quantity and carbon dioxide influence young ornamental plant production in greenhouses and indoor controlled environments?

  • Optimizing LED lighting for flower crops

    Published on July 1, 2021

    Questions abound when considering use of LED lighting. Choices of fixtures and light quality can be very confusing. In this 45-minute video presentation, Dr. Erik Runkle simplifies the selection and use of LEDs, both indoors and in greenhouses.

  • Managing light pollution

    Published on August 9, 2019
    While electric lighting is increasingly used in greenhouses to increase plant growth, yield, and quality, it can have unintended consequences to neighboring areas at night.

  • Light spectrum for different applications

    Published on September 8, 2021
    This article discusses the effects of the light spectrum on plants, and conceptually how it can be used for different greenhouse and indoor crop production applications.

  • Green and blue LED lighting

    Published on March 6, 2019
    Indoor production of leafy greens, Part 2 of 4: How green light affects lettuce growth can depend on blue and red light.

  • The importance of light uniformity

    Published on March 3, 2017
    Managing light is obviously critical to the production of crops grown in controlled environments. When considering the different dimensions of light, we often overlook the importance of light uniformity.

  • Leafy greens: Green & far red LED lighting

    Published on February 1, 2019
    Indoor production of leafy greens, Part 1 of 4: Substituting green or far-red light for blue light can increase lettuce and kale yields.

  • LEDs: Far red & light intensity interaction

    Published on March 4, 2019
    Part 2 of a 5-part series explains how far-red light and light intensity (the photosynthetic photon flux density) interact to influence growth of young plants indoors, under fully controlled environments.

  • Leafy greens: Sole-source light intensity

    Published on June 6, 2019
    Indoor production of leafy greens, Part 4 of 4: Research shows that providing high-intensity sole-source lighting to seedlings can increase harvestable yield of fresh-cut basil.

  • Horticultural lighting applications

    Published on June 11, 2018
    This article summarizes the different lighting applications and characteristics used in horticulture, including in greenhouses and indoors.

  • Making sense of light sensors

    Published on February 10, 2021
    In this article, we discuss light sensors, light units, and how to convert light units from a greenhouse environmental control computer into more meaningful values.

  • Lighting young plants indoors

    Published on February 4, 2019
    Part 1 of a 5-part series is an introduction to producing young plants indoors under fully controlled environments.

  • Tips for using light sensors

    Published on January 24, 2009
    In winter, low light levels can limit production. And in summer, too much light can stress crops. Measuring light accurately is one step to harnessing growing conditions.

  • Light it up!

    Published on July 24, 2006
    Erik Runkle talks about how to measure and maintain light for new and learning greenhouse owners.

  • Which light sensor should I use?

    Published on September 23, 2012
    This article focuses on the different units of instantaneous light intensity and how each is measured.

  • Is green light useful to plants?

    Published on June 17, 2019
    There is some confusion about the efficacy of green light at promoting photosynthesis. This article explains why and how green light is useful to plants.

  • Turning on/off supplemental lighting

    Published on October 23, 2013
    The costs to operate high-intensity lighting in greenhouses are quite high, so operation of lights should be managed as efficiently as possible.

  • How green light affects floriculture crops

    Published on February 13, 2019
    Is green light really a safe light for floriculture crops? Researchers at Michigan State University find out the impact it has on crops that flower in response to the day length.