Describe the controversy over how many plants are needed to produce “fresh air” for a room
What will be an ideal response?
There are still arguments as to just how many plants are needed to provide “fresh air” to a room. Some
believe that one large plant, such as an 8-10 inch potted Dracaena, is perfect for a 100 square foot
office. Others argue that it would take three times that figure to compensate for lack of air replacement
in a new office space with fresh paint and carpet. Some research states that the presence of plants
indoors does not have much to do with the overall improvement of indoor air quality because
experiments have worked with controlled spaces more than actual offices.
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________ cuttings are collected when the stock plant is dormant, whereas ________ cuttings are normally collected after the first growth flush.
Fill in the blank(s) with the appropriate word(s).
Technician A says use kerosene as a spray lube before resurfacing aluminum heads. Technician B says belt sanders are the best method for resurfacing aluminum heads. Who is right?
A. Technician A B. Technician B C. Both technicians D. Neither technicians
One common way to group weeds is as being common or:
a. Uncommon c. Noxious b. Exceptional d. Toxic
Products that consist of all the necessary concrete forms and accessories are called _____
a. packaged systems b. manufactured systems c. proprietary systems d. form unit systems