Article in Acres, a gardening magazine. According to this Russian guy who is working on a Phd in agroforestry at the Univ. of Missouri-Columbia, Russia produces more than 60 percent of all vegetables in small home gardens. For potatoes, fruits and berries, it's close to 80 percent. Russians have a tradition of growing their own food if possible because they have had hundreds of years of rottem governments that didn't adequately see to their food needs. The worst was Joseph Stalin, the communist dictator who did away with the private ownership of land , created collective farms, and starved the independent farmers who had crop growing skills. There was shortages of food, and at some point the government allowed workers on the collective farms to have small gardens and sell the produce. Fast forward to the collapse of the Soviet Union and the end of subsidies to the collective farms. People didn't notice it because people were used to producing their own food or buying it from people who had gardens. In 2003 russia passed the Private Garden Act which entitles Russians to small plots of land free. The gardens created are about a tenth of an acre.
I have long noticed that gardening, because of the attention paid to the crops, is more productive than most commercial agriculture. Corn is probably an exception because there is only so much corn that can be grown per foot of row whether its in a garden or in a field. Soybeans may be an exception also, but since few people grow soybeans in a garden there is no basis for comparison. However, corn grown in a garden can be grown without expensive machinery or chemical weed control. The big advantage to gardening, IME, is the savings on food bills, and the improvement in the quality of the food produced. The classic example of quality is to compare a grocery store tomato with a home grown ripe one.
KEH