States have been placed in the following. categories: Known- where states have either declared their programs or there is clear evidence of chemical or biological weapons possession. Probable- where states have been publicly named by government or military officials as probable chemical or biological weapons.
It is much more complicated than this, and hopefully you can see that the answer to your question is based on many variables. There are many ranches in Texas that are greater thn 50,000 acres, some as large as 250,000 acres, and a handful larger than that. A common sized ranch would be around 500 acres.
The largest ranches in North America are about one-tenth that size. The largest contiguous ranch in the United States is Wagoner Ranch in Texas with 535,000 acres which is equivalent to 2165 sq kilometres. The largest in Canada was the Alexis Creek Ranch in British Columbia with 350,000 acres, approximately 1416 sq kilometres.