Science for Life

The Cornell University Agricultural Experiment Station is dedicated to sustainable "science for life," in its two core separate but related functions -- the operation of world-class research facilities throughout the state and the generation and application of research-based knowledge through the administration of federal formula grants. 

Spotlight

Greenhouse scientists show that soil mix and light matter

Light and dirt can make all the difference when it comes to growing plants. Yet many researchers fail to consider these factors when they develop their studies, says greenhouse manager Andy Leed.

“I’ve seen a lot of raised eyebrows,” Leed says, showing off four flats boasting a vigorous carpet of healthy plants at a recent open house. But their sister plants in three other flats were limping along. The differences had nothing to do with introduced pathogens or poor germination – and everything to do with the potting mix.

Melissa Brechner shows how a photosynthetically active radiation meter measures light the way plants use it.

Meanwhile, Melissa Brechner, a biological and horticultural engineer, illuminated visitors on another underappreciated factor: light. For consistent results, researchers supplement light to provide plants with proper conditions for growth. But when they set up their experiments, many use light meters that measure light the way we see it rather than the way plants use it.

These meters overestimate the light plants are receiving, Brechner says. “You can’t really replicate someone’s experiments if their measurements are flawed.”

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