Agricultural Science Questions and Answers

For the cultivation of yam and cassava, the recommended NPK fertilizer ratio is 20:10:10. This means the fertilizer contains a higher percentage of nitrogen (N) compared to phosphorus (P) and potassium (K). Nitrogen is essential for promoting vegetative growth and leaf development, which is important for yam and cassava during their early stages of growth.

The gestation period for a sow (female pig) is approximately 3 months, 3 weeks, and 3 days, which is equivalent to about 114 days.
If the sow was serviced (mated) on May 1, we can calculate the expected date of parturition (giving birth) as follows:
Count 3 months from May 1: May + 3 months = August 1
Count 3 weeks from August 1: August 1 + 3 weeks = August 22
Count 3 more days from August 22: August 22 + 3 days = August 25
So, based on the gestation period, the expected date of parturition is around August 25. However, since not all months have the same number of days, we need to adjust for the extra days to reach the actual parturition date.
Counting from August 25 to September 30, there are 36 days (25 days in August and 5 days in September). Adding these 36 days to August 25:
August 25 + 36 days = September 30
Therefore, the expected date of parturition is September 30.

Total number of birds = 2,000
Number of eggs laid per day = 1,680
Number of eggs laid in 7days = 1,680 x 7 =11760
Number of eggs in one tray = 30
x =11760/30
=392 trays

Number of birds that did not lay eggs = Total number of birds - Number of eggs laid
Given information:
Total number of birds = 2,000
Number of eggs laid = 1,680 per day
Number of birds that did not lay eggs = 2,000 - 1,680 = 320
Now, we can calculate the percentage of birds that did not lay eggs:
Percentage of birds that did not lay eggs = (Number of birds that did not lay eggs / Total number of birds) x 100
Percentage of birds that did not lay eggs = (320 / 2,000) x 100 = 0.16 x 100 = 16%
Therefore, the percentage of birds that did not lay eggs on that particular day is 16%.

Among the given options, 'Rubber' is the crop that requires a nursery. A nursery is a place where plants are propagated and grown to a desired age. Rubber seeds are usually sown in a nursery and the seedlings are transplanted to the field when they are about 6 months old.