The range for specific gravity in a normal urine specimen is greater-than-or-equal-to 1.003. The range of creantinine in a normal urine specimen is greater-than-or-equal-to 20mg/dl. If BOTH the specific gravity and the creatinine levels fall below the normal range, the specimen is considered dilute.
However, the statistics from 1950 to 2008 (68 years) show nothing but appreciation. The vineyard that was worth $1,000 an acre in 1950 will be worth $1 million an acre after 100 years, in 2050. Back in 1950, an acre of producing vineyard land in Napa County could be purchased for an average of $1,000 per acre. In 2013, and even after a disastrous economic crash, Napa County an acre of producing vineyard land was selling at around $200,000 per acre.
At $4,455 per ton for grapes and 4.5 tons per acre the gross returns is $20,000, giving $3,700 per acre net profit. Of course, a different yield or price per acre changes that calculation dramatically.At 3.5 tons per acre and $4,455 per ton, the grower would lose $450 per acre.At $5,805 per ton for grapes and the same yield, the grower would net almost $10,000, but few growers can expect both high prices and high yields.n 2011, it was actually only 2.7 tons per acre, slightly less than the county average of 2.8 tons per acre for all grapevines. In 2010, the county average was 3.3 tons per acre. A price of $4,455 per ton for Cabernet Sauvignon is assumed in calculating returns, but other prices are also shown for comparison.