tag:blogger.com,1999:blog-2149943594271779212.post7098994766141912329..comments2017-05-09T14:46:47.418-07:00Comments on A Diary of Numbers: Skyscraper Farmaaronsantosdotcomhttp://www.blogger.com/profile/09803515727250282449noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2149943594271779212.post-62008098558251873982010-06-09T14:46:49.791-07:002010-06-09T14:46:49.791-07:00Something to note is that most people don't ge...Something to note is that most people don't get all their calories from vegetables. If you eat like me, I probably get only 10% of mine out of vegetables. But we could use 50%, so the caloric need would be cut by half to 1000 Cal/day.<br />(2x)<br /><br />Then, there is no reason why you can only use the floor that is already there, a lot of vegetables (including potatoes) are not that tall. You could think of putting the floors closer together to fit maybe 10 layers per floor.<br />(10x)<br /><br />Since the real state is so expensive one could predict that technologies would be developed to increase the plant density. Lets say fourth-fold increase in productivity.<br />(4x)<br /><br />Taking into consideration these factors (4x, 10x, 2x)), we get that the required amount of buildings would go down to 20000/80 =250. <br /><br />*Maybe it would be fun to calculate how much CO2 a plant like this would remove from the middle of New York City.Kellemhttp://www.blogger.com/profile/14566478630869339937noreply@blogger.comtag:blogger.com,1999:blog-2149943594271779212.post-52193895852071496492010-05-21T09:34:14.324-07:002010-05-21T09:34:14.324-07:00Here's an even more critical assessment on the...Here's an even more critical assessment on the limitations of vertical farming:<br /><br />http://www.alternet.org/food/146686/why_planting_farms_in_skyscrapers_won%27t_solve_our_food_problemsaaronsantosdotcomhttp://www.blogger.com/profile/09803515727250282449noreply@blogger.comtag:blogger.com,1999:blog-2149943594271779212.post-71743368951221423082010-05-14T08:12:37.179-07:002010-05-14T08:12:37.179-07:00floor space of the building is 2,768,591 sq ft = ...floor space of the building is 2,768,591 sq ft = 63.5581038 acres<br /><br />Potatoes yielded from two to four times more calories per acre than grain did, (wiki potato)<br /><br />Basic daily: round to 2000 (men/women/height/weight/activity make this a large std dev value..)<br /><br />6000 calories of grain can be produced per acre per day. (http://chemistryandphysics.astate.edu/jpratte/activities/activity8-1.htm)<br /> <br />Assume potatoes as the highest calorie per acre crop. Average it as 3x as many calories than grain, so potatoes can grow 18000 calories per acre-day.<br /><br />If we've got 63.56 acres, that's 18000*63.56 = 1144080 calories. <br /><br />At 2000 calories/day-person, 1144080/2000 = 572 people.<br /><br />New York has a lot of people. Appx 8.4 million people (http://www.nyc.gov/html/dcp/html/census/popcur.shtml)<br /><br />So 572/8400000 = 6.8e-5, or .0068 % of the population.. <br /><br />Another site (with no references) claims apples produce 23m cal/acre or appx 63k cal/day (and potatoes at 8 million cal/acre or ~22k cal/day). Not sure I trust those numbers.<br /><br />monsanto claims corn yields of 229 bushels/acre (assuming per year). http://www.monsantoperformance.com/images/sample_yb_b.jpg<br /><br />1 cup sweet yellow corn (154g, .4 lbs) has 132 cals. So 1 lb of corn would be 330 cals<br />(1 10 ox package froz corn has 230 cals, so that gives 368 cals lb, lots of variation, pick 350 cals/lb of corn) http://caloriecount.about.com/calories-corn-sweet-yellow-i11179<br /><br />229 bushels/acre-year * 56lbs/bushel * 350 calories/lb. * 63.55 acres = 285237820 cals/year / 365 days/year = 781473 cals/day / 2000 cals/day-person = 390 people a day, less than potatoes.ntmhttp://www.blogger.com/profile/11393330082984808604noreply@blogger.comtag:blogger.com,1999:blog-2149943594271779212.post-39724954693338166772010-05-14T06:04:52.487-07:002010-05-14T06:04:52.487-07:00Assuming that a 3,000 sq ft patch* will feed one p...Assuming that a 3,000 sq ft patch* will feed one person all year round (I have no idea if that's remotely right: it's tough to find), and that the entire building is converted to vertical farming, it would feed about 0.011% of NYC -- 900 people, give or take.<br /><br />*After a year of hoeing a 2.5-acre bean field at Walden, Thoreau got tired of so much work and lived his 2nd year on only 1/3 of an acre. With that as your one-man-feeding standard, the whole Empire State Building would feed 190 folks -- or 0.0023% of New York.Zacharyhttp://www.blogger.com/profile/08211357731313031292noreply@blogger.com