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HHS Greenhouse Management Final Exam updated study guide actual questions and CORRECT answers

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HHS Greenhouse Management Final Exam updated study guide actual questions and CORRECT answers Photon: - CORRECT ANSWER Particles of light Day light integral (DLI) - CORRECT ANSWER moles of light/sq meter/ day Max DLI during summer and winter: - CORRECT ANSWER winter: 5 mol .m-2.d-1 summer: 60 mol.m-2.d-1 desirable DLI for plant growth in greenhouse: - CORRECT ANSWER phalenopsis and african violets like less at 4-6 mol 10-12 mol How are short days created in greenhouse and what are some precautions? - CORRECT ANSWER Shade cloth 12-16 hour dark period, however it may cause inconsistent shadowing which could delay flowering, non uniform flowering, or abnormal flower form. Light leak- same inconsistencies but also heat delay which can cause delay of crop and flower abortion. Plant responses to photoperiod: - CORRECT ANSWER photoblastic seed (need light to germinate) branching, substitute for cold,

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HHS Greenhouse Management Final Exam
updated study guide actual questions and
CORRECT answers
Photon: - CORRECT ANSWER Particles of light



Day light integral (DLI) - CORRECT ANSWER moles of light/sq meter/ day



Max DLI during summer and winter: - CORRECT ANSWER summer: 60 mol.m-2.d-1

winter: 5 mol .m-2.d-1



desirable DLI for plant growth in greenhouse: - CORRECT ANSWER 10-12 mol

phalenopsis and african violets like less at 4-6 mol



How are short days created in greenhouse and what are some precautions? - CORRECT
ANSWER Shade cloth 12-16 hour dark period, however it may cause inconsistent
shadowing which could delay flowering, non uniform flowering, or abnormal flower form.



Light leak- same inconsistencies but also heat delay which can cause delay of crop and
flower abortion.



Plant responses to photoperiod: - CORRECT ANSWER branching, substitute for cold,
photoblastic seed (need light to germinate)



How are long days created in greenhouse? - CORRECT ANSWER Night interuption
lighting

cyclic lighting (on 16 minutes off 24 minutes)
day continuation with lighting (not as good)



What is PAR? - CORRECT ANSWER photosynthetically active radiation

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