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02 Oct 2024, 05:03
Kudos
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A community organization wants to restore the indigenous forests around the Mahurangi River in New Zealand by planting millions of trees along the banks of the river. Unfortunately, seedlings of indigenous tree species are expensive. At the beginning of the project in 2010, high-quality seedlings of common nonnative plants in the area cost around 0.30 New Zealand dollars (NZ$) each. By contrast, high-quality indigenous seedlings cost around NZ$3 each. Although scale did play a role, the principal cause of the price difference was the nursery methods used. Nonnative species were raised in open-ground beds utilizing mechanization, whereas indigenous species were typically raised in containers because of the perception that they are particularly prone to transplantation shock.
The organization conducted a study to evaluate whether indigenous species could be successfully produced using the open ground method of forestry and to determine the approximate post-transplantation survival rates and foliage growth they could expect from seedlings raised in this manner. They planted a test plot with seedlings of six indigenous species commonly used for restoration plantings in the area. One third of the seedlings of each species had been raised using open ground methods, one third had been raised in large containers, and one third had been raised in small containers.
The organization conducted a study to evaluate whether indigenous species could be successfully produced using the open ground method of forestry and to determine the approximate post-transplantation survival rates and foliage growth they could expect from seedlings raised in this manner. They planted a test plot with seedlings of six indigenous species commonly used for restoration plantings in the area. One third of the seedlings of each species had been raised using open ground methods, one third had been raised in large containers, and one third had been raised in small containers.
They had both higher survival rates and larger canopy spreads after one year when grown in large containers rather than in small containers or open ground.:
They had higher survival rates after one year when grown in open ground rather than in either small or large containers.:
They had smaller canopy spreads after one year when grown in small containers rather than in large containers or open ground.:
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (03:12) correct
35%
(03:09)
wrong
based on 972
sessions
History
Date
Time
Result
Not Attempted Yet
For each of the following statements about the indigenous New Zealand plants used in the study, select Yes if that statement is true of every species in the study, according to the information provided. Otherwise select No.
| They had both higher survival rates and larger canopy spreads after one year when grown in large containers rather than in small containers or open ground. | ||
| They had higher survival rates after one year when grown in open ground rather than in either small or large containers. | ||
| They had smaller canopy spreads after one year when grown in small containers rather than in large containers or open ground. |
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Official Answer
They had both higher survival rates and larger canopy spreads after one year when grown in large containers rather than in small containers or open ground.:
They had higher survival rates after one year when grown in open ground rather than in either small or large containers.:
They had smaller canopy spreads after one year when grown in small containers rather than in large containers or open ground.:
Koromiko
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
82% (01:06) correct
18%
(00:52)
wrong
based on 890
sessions
History
Date
Time
Result
Not Attempted Yet
If the organization used an equal number of seedlings of each species in the study, then of the following species, which one had the greatest number of surviving specimens at the end of one year?
| Karamü | |
| Koromiko | |
| Mänuka | |
| Harakeke | |
| Ti köuka |
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Official Answer
Koromiko
Koromiko: Yes
Mänuka: Yes
Harakeke: Yes
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
78% (01:27) correct
22%
(01:45)
wrong
based on 876
sessions
History
Date
Time
Result
Not Attempted Yet
Suppose that the organization has decided to use only open-ground-raised seedlings in their next restoration project. They will plant exactly 3 of the species used in the study. They have decided not to include any species that had a one-year survival rate of less than 70 percent in the study, or any species that had an average one-year canopy spread of less than 40 cm in the study.
For each of the following indigenous plant species, select Yes if that species will be included in the organization's next restoration project, according to the information provided. Otherwise select No.
For each of the following indigenous plant species, select Yes if that species will be included in the organization's next restoration project, according to the information provided. Otherwise select No.
| Yes | No | |
| Koromiko | ||
| Mänuka | ||
| Harakeke |
ShowHide Answer
Official Answer
Koromiko: Yes
Mänuka: Yes
Harakeke: Yes
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08 Oct 2024, 11:10
Kudos
Bookmarks
1. Part 1. We are asked to find which statements are true for all species.
2. Part 2. We need to find the species that will survive the most. Since each species is split into 3 equal groups, then we can simply add the number and see which one is the largest.
So, our answer is Koromiko.
3. Part 3. We are asked to find which species will be included in the project. In other words, which species fit the needed requirements for open ground.
- "They had both higher survival rates and larger canopy spreads after one year when grown in large containers rather than in small containers or open ground". If we look at karamu, then the survival rate in open ground is greater than in large containers. So, this statement is not true for all.
- "They had higher survival rates after one year when grown in open ground rather than in either small or large containers". If we look at manuka, then the survival rate in a large container is more than in open ground. So, this statement is not true for all.
- "They had smaller canopy spreads after one year when grown in small containers rather than in large containers or open ground". Looking at the canopy spread chart, we see that the canopy spread in small containers is the smallest for all species. So, this statement is true for all.
2. Part 2. We need to find the species that will survive the most. Since each species is split into 3 equal groups, then we can simply add the number and see which one is the largest.
- Karamu. 0.93 + 0.87 + 0.96 = 2.76
- Koromiko. 0.97 + 0.92 + 0.99 = 2.88
- Manuka. 1 + 0.89 + 0.84 = 2.73
- Harakeke. 0.96 + 0.93 + 0.95 = 2.84
- Ti Kouka. 0.9 + 0.4 + 0.65 = 1.95
- Toetoe. 0.59 + 0.31 + 0.59 = 1.49
So, our answer is Koromiko.
3. Part 3. We are asked to find which species will be included in the project. In other words, which species fit the needed requirements for open ground.
- Koromiko. Has a survival rate of 0.99, which is > 0.70. In addition, it has a canopy spread of 44 cm, which is > 40. So, Koromiko works.
- Manuka. Has a survival rate of 0.84, which is > 0.70. In addition, it has a canopy spread of 43.4 cm, which is > 40. So, Manuka works.
- Harakeke. Has a survival rate of 0.95, which is > 0.70. In addition, it has a canopy spread of 49.4 cm, which is > 40. So, Harakeke works.
