Half an acre and a cow

Half an acre and a cow · More from wiki Arable land

That is what Chesterton thinks a man needs for sustenance.

Obviously, if ten men go off and do things in cities instead, you need farmers to take care of their 5 acres and 10 cows on top of their own.

Do we have that in the world?

The acre is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain by 1 furlong (66 by 660 feet), which is exactly equal to  1⁄640 of a square mile, 43,560 square feet, approximately 4,047 m2, or about 40% of a hectare.

Half an acre and a cow.

7 billion.

3.5 billion cows, for starters.

Also, 3.5 billion times 4047 sqm.

= 14164500000000 sqm

There are 1000 meters of length per kilometre, so there are 1000000 sqm per sqkm.

= 14,164,500 sqkm. arable and cow broughable land.

Australia (including Tasmania) has in all 7,692,024 sqkm. Not all arable and so, but this means, if you go to a place where all land is arable, 1.8414529127834235 or somewhat less than twice Australia is all that is needed to feel all of mankind.

I think we have more arable land than that in the world.

Hans Georg Lundahl
Noisy
St Zacharias, father
of St John the Precursor
5.XI.2016

Statistics, definition, from article Arable land:

In Britain, it was traditionally contrasted with pasturable lands such as heaths which could be used for sheep-rearing but not farmland. According to Food and Agriculture Organization of the United Nations the world's Arable land amounted to 1,407 M ha, out of a total 4,924 M ha land used for agriculture, as for year 2013. [To the right I add to least, two mid and one most hectare per person of a country. Half an acre = roughly 0.2 hectares]

2008 13,866 Hong Kong SAR, China 0.000
2009 13,873 Singapore 0.000
2010 13,880 Macedonia, FYR 0.199
2011 13,962 Myanmar 0.203
2012 13,958 Australia 1.999

"FAOSTAT Land Use module". Food and Agriculture Organization. Retrieved 8 July 2016.
http://faostat3.fao.org/browse/R/RL/E