A normal range for blood urea nitrogen is generally 8 to 24 mg/dL for adult men (2.86 to 8.57 mmol/L) and 6 to 21 mg/dL (2.14 to 7.50 mmol/L) for adult women. However, urea nitrogen levels vary by age. Infants have lower levels than other people do.
Fortunately, freezing zucchini and other summer squash is a snap: All you do is cut it into half-inch slices, blanch it in a pot of boiling water for three minutes, transfer it to a bowl of ice water to cool, drain it, and bag it.
If left unharvested, zucchini squash will easily reach 2-3 feet long and 8-10 inches in diameter. When harvesting zucchini, use a knife or shears and cut the stem 1 inch above the squash. Do not try to pull or twist the squash off the vine as you will risk damaging the plant and root system. Remember, zucchini plants won't tolerate root disturbance.