2023 National Floriculture Exam

What causes the stomata on the leaf to open?

• Darkness

• Moisture Availability

• Light

• Oxygen

The ideal water to air ratio in the pores of the soil is

• 25% air and 75% water

• 60 air/ 40 water

• 80 air/20 water

• 50 air/ 50 water

Root growth bio-stimulants do all of the following except:

• increase respiration

• improve water uptake

• increase the number of fibrous roots

• improbe nutrient uptake

In floral design, the three secondary colors are:

• brown, purple, white

• orange, green, violet

• red, yellow, blue

• yellow, blue, green

Which of these lists of flowers are all line flowers?

• Aster, daffodils, bells of Ireland, peonies

• Roses, statice, carnations, sunflowers

• Baby's breath, liatris, sunflowers, roses

• Liatris, gladiolus, snapdragons, delphinium

Ridge and furrow greenhouses by definition, are

• greenhouses built as a stand a lone greenhouse

• greenhouses connected to one another along the length

• greenhouses built as a lean to greenhouse

• greenhouses with an uneven span design

Most plants grow best at pH of

• 5.4-6.0

• 4.5-5.8

• 6.2-6.8

• 7.0

The term used for the response of a plant to the day-night cycle is

• photoperiodism

• photosynthesis

• Respiration

• Assimilation

Which of these LD numbers would be the most toxic pesticide?

• LD 50 number of 855

• LD 50 number of 51

• LD 50 number of 411

• LD 50 number of 126

The process whereby nitrogen is lost from the soil to the atmosphere is called

• Chlorosis

• nitrification

• denitrification

• leaching