Why is the pH of poinsettia medium an important consideration?
What will be an ideal response?
The pH of the poinsettia medium is important because it controls the resources of
available nutrients needed by the plant. A soilless medium should have a pH of 5.8 to 6.2,
whereas for a medium that contains soil the pH should be 6.0 to 6.4. It is also necessary
to test the pH of the water being applied to the crop. If the pH is alkaline, it may be
necessary to use an acid treatment in the water to lower the pH level.
You might also like to view...
Technician A says that in some short-and-long arm front suspension systems, the coil springs are mounted between the lower control arm and the chassis. Technician B says that in this type of suspension system, the upper ball joints are the load-carrying ball joints. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Are compounds that release nutrients in forms useful to plants called nutrient carriers?
Indicate by YES (Y) or NO (N).
A weed that reproduces asexually is most likely:
a. an annual c. a perennial b. a biennial d. None of these answers is correct.
Match each item with a statement below.
A. The non-vegetated elements of a landscape, including paving, walkways, roads, retaining walls, street amenities, fountains, and pools. B. Used to transform slopes into level areas for buildings and yards, or to maintain tree roots near construction zones. C. Along with vegetated trellises, rows of trees provide privacy, windbreaks, and help define the limits of outdoor living spaces. D. Can provide permeable surfaces, reduce runoff, provide windbreaks, and help reduce local temperatures by absorbing heat from the sun. E. Help reduce runoff and can provide free water for irrigation as well as some interior uses. F. Depressed vegetated areas that collect surface runoff from impervious surfaces.