What metrics would you track to evaluate greenhouse performance?

• A. Pest incidence and crop color.
• B. Yield per square meter, total production, energy consumption per unit yield, water use efficiency, labor hours, pest incidence, crop quality.
• C. Days since planting.
• D. Water pH and nutrient concentration.

Answer: (B)

In evaluating greenhouse performance, you want metrics that show both how much you’re producing and how efficiently you’re using resources. The best set includes yield and total production to capture output, plus measures that tie that output to the inputs and costs involved. Yield per square meter tells you how productive the space is, while total production gives a full harvest volume. Energy consumption per unit yield links energy use directly to what you’re producing, which is crucial since lighting, heating, and cooling can be major costs. Water use efficiency shows how well water is converted into harvest, an essential consideration in water-scarce or water-cost environments. Labor hours reflect the human effort and cost behind production, so you can assess productivity and staffing needs. Pest incidence tracks crop health and potential losses due to pests, and crop quality focuses on the end product’s market value and suitability, which is what ultimately determines profitability.

Other options miss key pieces of the picture. Pest incidence with crop color, for instance, includes pest pressure but makes crop quality and productivity core metrics incomplete, and color alone isn’t a reliable performance signal. Days since planting tells you timing but not how efficiently inputs are used or what yield you’re achieving. Water pH and nutrient concentration are important management parameters, but on their own they don’t provide a holistic view of overall greenhouse performance; they’re inputs that help achieve the desired outputs, which should be tracked alongside them.