Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
58 Cards in this Set
- Front
- Back
|
Why do we mow lawns? |
Appearance. Lawns that are mowed regularly and properly have a greater tolerance to heat and drought. |
|
|
Rye grass, blue grass, and fescue should be mowed to a height of ______. |
2"-3". |
|
|
Bentgrass can be cut down to ______. |
1/8" |
|
|
As a guideline, no more than ____ of a grass blade should be removed at one time |
1/3 |
|
|
What can happen if grass is continuously cut too short? |
Roots will die back, Reduced tolerance to heat and drought, and will have more weeds and pests |
|
|
How much water should a lawn receive per week during its growing season? |
1" 2.5cm |
|
|
How often and when should clay soils be aerated? |
Twice a year. In spring and fall |
|
|
How often and when should sandy soils be aerated? |
Once a year. In spring OR fall |
|
|
When should you avoid aerating? |
Periods of high heat. |
|
|
How long before aeration should you water your lawn? |
Water the day before. |
|
|
When should dethatching be avoided? |
When grass has actively started to grow as the crown could be damaged When grass is under stress from high heat or drought |
|
|
Verticutter |
|
|
Should a lawn be moist or dry before dethatching? |
Allow moist or wet turf to dry out before dethatching |
|
|
When setting the blade depth and spacing on a dethatcher, how should the blades be spaced for thick or tough grasses? |
3" spacing |
|
|
When should overseeding be done? |
Spring or Fall when air temperature is between 4° and 27° |
|
|
How long after overseeding should you wait before applying herbicides? |
1-2 months |
|
|
Avoid applying fertilizers __ months before overseeding an area. |
1 -2 months |
|
|
Why should a verticutter be run perpendicular across slopes? |
So seeds do not get washed away by rain or irrigation |
|
|
Should a slow release nitrogen fertilizer be used before or after turf us established? |
After it is established. Fertilizing before can burn the new shoots |
|
|
Why is nitrogen important? |
It promotes above ground growth, color, and density and helps fight off weeds and pests. |
|
|
Why is phosphorus important for turf? |
It is used to establish strong roots. |
|
|
Why is phosphorus banned by some municipalities? |
When phosphorus reaches water ways it can cause algae blooms |
|
|
Why is potassium important for turf? |
Helps turf withstand stress caused by disease and cold temperatures |
|
|
When is the best time to fertilize turf? |
Near the beginning of the most active growing season and before the season of dormancy |
|
|
Which requires more frequent fertilizing, lawns on sandy soil or lawns on clay soils? |
Sandy soils. Water moves through sandy soils faster which causes nutrients to be leached away |
|
|
Which nutrient can help grass recuperate from injury in a high traffic area? |
Nitrogen |
|
|
When should you avoid fertilizing turf? |
When a grass is dormant. This can promote weed growth |
|
|
Turf should be dethatched when thatch exceeds ___. |
1/2 inch 1.2cm |
|
|
Which of the 3 macronutrients promotes the development of flowers? |
Phosphorus |
|
|
When using a leaf blower make sure that bystanders are at least ____ away. |
50 feet 15 meters |
|
|
Before making adjustments or repairs to a mower, how can you disable the engine? |
Disconnect the spark plug |
|
|
Hills greater than ___ degrees should be cut with a walk behind mower. |
30 degrees |
|
|
How wide is the danger zone for bystanders when using a grass trimmer? |
50 feet 15 meters |
|
|
When using a grass trimmer you should never raise the cutting line above _____. |
Knee height |
|
|
What should you disconnect on your grass trimmer before you work on it? |
Spark plug |
|
|
How can you measure irrigation rates? |
Place a tin can on the lawn while the sprinklers are operating and time how long it takes to fill the tin with 1 inch of water. 2.5cm of water |
|
|
How can you help prevent a tree from drying out over the winter? |
Give it a heavy watering before winter so it can store water |
|
|
What type of fertilizer should be used on annuals? |
Fertilizers high in phosphorus |
|
|
What type of fertilizer should be used for turf? |
High nitrogen fertilizer |
|
|
What type of fertilizer can help plants winterize? |
Plants high in potassium |
|
|
Warm season grasses do best between these temperatures |
25 degrees - 35 degrees |
|
|
Cool season grasses grow best in these temperatures |
18 degrees - 24 degrees |
|
|
Formula for calculating fertilizer amounts |
Rate (per area) / Fertilizer as decimal. =amount per area |
|
|
Formula for liquid fertilizer concentrations |
1 gram of fert. in 1 litre = 1ppm |
|
|
A protective waxy substance on leaves |
Cuticle |
|
|
Which nutrient can be the most limiting factor in plants? |
Nitrogen |
|
|
Yellow foliage is often a symptom of |
Oxygen starvation |
|
|
What causes oxygen starvation |
Overwatering deprives roots of oxygen |
|
|
Wilting and loss of leaves are often a sign of |
Underwatering |
|
|
For winter watering, what time of day should you water? |
Early in the day. This way the water is absorbed before temperatures drop below freezing |
|
|
When should you avoid fertilizing trees and shrubs? |
Avoid fertilizing late in the season and during droughts |
|
|
What time of year should tree wrap be applied ? |
Fall |
|
|
How high on a tree should tree wrap be applied? |
From the base to the first set of branches |
|
|
The best way to protect tree trunks from frost cankers and sunscald |
Tree wrap |
|
|
The best way to protect tree trunks from frost cankers and sunscald |
Tree wrap |
|
|
Most common turf diseases |
Fungus |
|
|
1 acre equals how many square feet? |
43,560 square feet |
|
|
Which nutrient helps a plant winterize? Why? |
Potassium. Helps plant create sugar which acts as an antifreeze |
