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Cropping Systems - Statistics
General Stats
- This quiz has been taken 7 times
- The average score is 14 of 20
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| If % pure live seed is 80% and the recommended seeding rate is 80 lbs per acre, what adjusted seeding rate should be used? | 100 lbs per acre | 100%
|
| Which of the following data are most precise? | 4,5,6 | 100%
|
| If pure seed content is 90% and germination is 90%, what is the %PLS? | 81% | 100%
|
| Water needs of a crop typically increase during the season to a maximum, followed by _____. | A decline to harvest | 100%
|
| ______ is when a plant produces a chemical toxin that impairs the growth of a different plant. | Allelopathy | 100%
|
| Crop root growth can be affected by _____. | All of the above | 100%
|
| The seeding rate is _____ plant population. | Always more than | 100%
|
| The optimum temperature for crop growth and development _____ with crop growth stage. | Changes | 100%
|
| _____ is an area that is managed similarly for a given crop input. | CMZ | 100%
|
| When diagnosing a crop production problem in the field, you should _____. | Compare damaged areas with normal areas | 100%
|
| Which of the following is a limitation of seed treatment? | Cost | 100%
|
| ______ increase(s) available N, reduces erosion and increase infiltration. | Cover crops | 100%
|
| Which of the following would most likely decrease germination percentage? | Dry soil | 100%
|
| In many crops, night length is important in triggering _____. | Flowering | 100%
|
| _____ is used to locate a position in a field. | GPS | 100%
|
| Harvest date is affected by _____. | Hybrid or variety | 100%
|
| Offspring of two plants which differ genetically are _____. | Hybrids | 100%
|
| Which of the following will most likely damage grain kernels? | Improper thresher speed | 100%
|
| ______ is not a limitation of cover or companion crops. | Increased soil erosion | 100%
|
| Identity-preserved (IP) crops are _____. | Kept separate from other varieties of the same crop | 100%
|
| The soil test values in the top 2 inches of soil are _____ soil test values below 2 inches in a no-till situation. | Larger than | 100%
|
| Geographical coordinates combine _____ and _____. | Latitude and longitude | 100%
|
| Seed quality is usually highest for seed stored under ______. | Low temperature and humidity | 100%
|
| Which of the following accelerates canopy closure? | Narrow rows | 100%
|
| Pollination is _____ in an open-pollinated variety. | Natural | 100%
|
| A plant that lives 10 years is a _____. | Perennial | 100%
|
| Which of the following is a characteristic of a well-designed field trial? | Replicated strips | 100%
|
| Crop mix on a farm is used to reduce _____. | Risk | 100%
|
| Pesticide carryover is most important in _____ crops. | Rotational | 100%
|
| Which of the following is normally not considered when comparing a crop rotation with a monoculture system? | Sociological consqeuences | 100%
|
| A benefit of using certified seed is _____. | Stable, high yields | 100%
|
| Yield monitors are _____. | Used to estimate yield variation within a field | 100%
|
| _____ is used to apply fertilizers, pesticides and seeds at different rates across the field. | VRT | 100%
|
| Fields are fallowed to conserve ______. | Water | 100%
|
| Which of the following is usually most important when selecting a variety for planting? | Yield potential | 100%
|
| The crop growth stage where roots, stems and leaves develop is _____. | Vegetative | 75%
|
| Which root system concentrates nutrient uptake in surface soil? | Fibrous | 67%
|
| Which of following is a limitation of a crop rotation over a monoculture system? | More equipment needed | 67%
|
| Storage in a _____ likely decreases bacterial inoculum viability the most. | Pesticide shed | 67%
|
| A double cropping system is where two crops are grown in the same field over _____. | 12 months | 50%
|
| If the base temperature is 60 degrees F, the daily temperature is 80 degrees F and the maximum temperature is 95 degrees F, how many heat units have accumulated? | 20 | 50%
|
| Transgenic crops contain _____. | All of the above | 50%
|
| GMOs include | All of the above | 50%
|
| Which of the following is probably not helpful in diagnosing a crop problem in the field? | Days of sunlight | 50%
|
| Sandy soils have greater _____ than clay loam soils which can affect yield. | Drought potential | 50%
|
| Which of the following would potentially lead to a reduced seeding rate? | Optimum soil moisture | 50%
|
| Which of the following is an advantage of a crop rotation over a monoculture system? | Risk spread across more than one commodity | 50%
|
| Which of the following factors is not used in determining depth of planting? | Soil texture with depth | 50%
|
| If the current local cash crop price of a crop is $12/bushel and the future price of a specific date is $9/bushel, the basis is _____. | $3/bushel | 33%
|
| If the value of a crop is $3/bushel and a production practice costs $11.50/acre, which of the following yield increases would make the production practice profitable? | 4 bu/acre | 0%
|
| If you count 10 plants in 5 sq ft of a field at several points in the field, what is the approximate plant population? | 85,000 plants per acre | 0%
|
| Which of the following must be sufficiently high to justify conversion of non-cropland to cropland? | Crop yield potential | 0%
|
| In clean-till systems, tillage can spread _____. | Diseases/Weeds | 0%
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| Growing degree days are not useful in determining when to _____. | Initiate tillage | 0%
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| The growing point of a grass is _____. | Intercalary meristem | 0%
|
| A crop should be replanted when stand is lost due to some stress, when _____. | It is economically justified | 0%
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| Which of the following may eliminate the possibility of replanting? | Late first planting | 0%
|
| Advantages of starter fertilizer include _____. | Lower irrigation costs | 0%
|
| Which of the following factors is most important in maintaining crop quality during storage? | Moisture at harvest | 0%
|
| Starter fertilizer is commonly recommended for _____. | No-till | 0%
|
| Which of the following harvest conditions most likely would reduce seed quality? | Rain-dry cycles | 0%
|
| Which of the following is most likely the result of seeding a summer crop too early? | Reduced germination | 0%
|
| Which of the following is not usually found on a seed information tag? | Seed size | 0%
|
| Which of the following factors is not used in determining when to plant? | Soil moisture | 0%
|
| If the yields of varieties A, B, and C are 45, 50, and 44 bu per acre, respectively, and the LSD is 5 which of the following is true? | The yield of variety B is significantly higher than varieties A and C | 0%
|
| Yield maps _____ from year to year for the same crop. | Vary | 0%
|
| Which germination test is best to evaluate germination under optimum conditions? | Warm | 0%
|
| _____ is a commodity crop. | Wheat | 0%
|
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