CORRELATING AGRICULTURE IN NORTHERN STATES. 33 
2. If but 80 per cent of the seed of this best ear would germinate, what loss would 
result, supposing each kernel should yield an ear and 85 ears to make a bushel, corn 
selling at 72 cents a bushel? 
3. What loss at this rate on an acre which would have produced 95 bushels from 
good seed? 
4. A cow produced in one year 8,465 pounds of milk containing 421 pounds of butter 
fat. Find the percentage of butter fat. 
5. In the stomach of one woodpecker 28 white grubs were found. If the bird had 
continued to eat this number each day for the month of October, compute the value 
of the bird in a potato field, assuming that each grub would have ruined one 4-ounce 
potato. Call potatoes 50 cents a bushel. 
6. A quail in December was known to consume for one day over 2,000 May weed 
seeds. Estimate that each 10 weed seeds might have cost one ear of corn the next 
year and that 85 ears make a bushel. Compute the loss prevented by 10 quails at this 
rate during the entire month of December. 
JANUARY. 
1. A club member reports the average daily milk production of his father's cows as 
11, 13, 17, 20, 26, and 30 pounds. What is the total for each cow for 300 days? At $2.10 
per hundredweight compare the best cow with the poorest. 
2. The milk for the same cows as tested for butter fat by the boy shows 4.9, 4.1, 5.1, 
3.8, 3.4, and 3.6 per cent, respectively. Find total butter fat for each cow and value 
at an average of 27 cents a pound for the year. 
3. Because of these tests, cows Nos. 1, 2, and 4 are sold and new cows bought pro- 
ducing 24, 29, and 34| pounds of milk, testing 5.2, 4.7, and 3.5 per cent butter fat, 
respectively. Find apparent yearly gain due to this exchange, butter fat being worth 
27 cents a pound. 
4. By using more care in feeding the same herd a ration costing but two cents a day 
more per cow results in an average increase of 4 pounds of milk a day. What profit 
results during a year? 
5. During a State test for one year the Holsteins averaged 14,688.8 pounds testing 
3.42 per cent, the Guernseys 8,465.4 pounds testing 4.98, and the Jerseys 7,046.7 pounds 
testing 5.16. Find annual value for each breed of market milk at $1.40 per hundred- 
weight, also of butter fat at 25 cents a pound. 
6. At what price per hundredweight must milk testing 4.9 per cent be sold to equal 
27 cents for butter fat, allowing 30 cents per hundredweight for skim milk? 
FEBRUARY. 
1. Find the percentage of loss occasioned by putting one poor egg in a 5-dozen case 
and having them rated as seconds at 29 cents instead of firsts at 35 cents a dozen. 
2. By testing a 30-dozen case of eggs and discarding six eggs a boy received 5 cents 
a dozen more on what remained. This was a 20 per cent gain on those sold. Find 
total receipts. 
3. About 15,000,000 bushels of seed corn are used in this country, of which 86.3 per 
cent is good. How many bushels should be rejected for better? 
4. It has been estimated that the rejection of the poor seed would have increased 
the average yield 298,140,695 bushels, or 13.7 per cent. Find the average yield. 
5. A girl is to raise one-eighth of an acre of tomatoes and will use a part of a field 
which is 15 feet wide. How long a strip will she use? How many plants can she set 3 
feet apart each way? 
6. Refer to Farmers' Bui. 22 and compute from the local feeds available a good 
ration for a 1,000-pound cow producing 22 pounds of milk. At the current prices 
compute the cost of this ration. 
