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Food per acre
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UnMeilleurReve
Dirt-Under-The-Nails Hippy


Joined: 29 Apr 2008
Posts: 542


Location: Las Vegas

Post Food per acre  Reply with quote
43560 sq ft per acre. You can survive on potatoes 1 acre per person per year, and that's with excess I think.

The average blackberry yield per acre per year is 5000 lbs.

Any info on how much food a person needs and how much we can get out of an acre should go here. Smile

And I say we grow us some blackberries. Also, fruited mulberry trees provide fruit and shade (and something to do when you're bored).


With a population of about 260 million people, most Americans enjoy a high standard of living and an abundance of relatively cheap food. The average yearly income per family in the United States is nearly $30,000 compared with only $4,000 per family in developing countries. About 15% of U.S. income is spent on food, whereas in most developing countries the amount spent on food ranges from 50% to 60%.

The average American consumes about 2,175 pounds of food per person per year, which provide about 3,600 Calories of food energy per day. This daily intake contrasts with the worldwide average of 2,700 Calories.

"Americans eat large amounts of animal products, totaling nearly 800 pounds per person per year, including dairy products. Approximately one-third of their calories is from animal sources and two-thirds from plant sources (Table 1). These animal products contribute excellent protein quality to the diet, but increase the fat intake of the average American to about 40% of the calories consumed.

In addition to all the food consumed by Americans, approximately 20% of all food produced, especially grains, is exported. At present, food crops represent a major U.S. export, and thereby help to diminish the deficit in our trade balance, caused in large measure by oil imports.

Self-sufficiency in food production and availability of basic resources, especially expensive fossil energy, support the high standard of living currently enjoyed by most Americans."


Last edited by UnMeilleurReve on Mon Jun 02, 2008 2:11 am; edited 1 time in total
Mon Jun 02, 2008 2:01 am View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
UnMeilleurReve
Dirt-Under-The-Nails Hippy


Joined: 29 Apr 2008
Posts: 542


Location: Las Vegas

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The following compares how much land (acres) it takes to grow the equivalent of approximately 1000 calories per day of each of the following: blackberries, blueberries, mango, apple, banana, and potato.

4 pounds blackberries = 944 calories
At 4 pounds per day Id need 1,460 pounds of blackberries per year.
Average blackberry yield is 5000 pounds per acre per year.
To grow 4 pounds per day Id need .29 acres

4 pounds of blueberries = 1017 calories.
At 4 pounds per day Id need 1,460 pounds of blueberries per year.
Average blueberry yield is 5,120 pounds per acre per year.
To grow 4 pounds per day Id need .28 acres.

5 pounds of mango = 1018 calories
At 5 pounds per day Id need 1,825 pounds of mangos per year.
Average mango yield is 6400 pounds per acre
To grow 5 pounds of mango per day Id need .28 acres.

4 pounds of apples = 986 calories
At 4 pounds per day Id need 1,460 pounds of apples per year.
Average apple yield is 10,000 pounds per acre
To grow 4 pounds of apples per day Id need .15 acres.

4 pounds banana= 1086 calories
At 4 pounds per day Id need 1,460 pounds of bananas per year.
Average banana yield is 16,000 pounds per acre per year
To grow 4 pounds of bananas per day Id need .09 acres

3 pounds of potatoes = 1076 calories per day.
At 3 pounds per day Id need 1095 pounds of potatoes per year.
Average potato yield = 20 tons, or 40,000 pounds of potatoes per acre per year.
To grow 3 pounds of potatoes per day Id need .03 acres.

Conclusions:
Mangos require nearly twice as much land as apples to grow the equivalent number of calories.
It takes three times as much land to grow blueberries then it does to grow bananas.
It takes nine times as much land to grow mangos then it does to grow potatoes.

This is a small number of food items. It doesnt take into consideration a host of issues such as transportation, climate, soil type and preparation, or the nutrient content beyond calories of these various foods.

Still, looking just at calories and the ability to feed folks, it appears you could feed 9 people potatoes on the same amount of land it would take to feed 1 person mangos. So looking at this slice of the pie, it would appear that eating a raw, mostly fruit diet, would increase, not decrease our impact on the planet.

Im not trying to talk anyone out of eating raw food; I just did this exercise because I was curious.

And I figured while I was at it Id go ahead and compare walnuts and sunflower seeds.

2 oz of walnuts = 344 calories per day.
At 2 oz per day Id need 46 pounds per year.
One acre yield of walnuts average 3000 pounds (in shell) per year
Walnuts in shell = 55% shells
One acre yield of walnuts shelled would average 1350 pounds per year
To grow 2 oz of shelled walnuts per day Id need .03 acres.

2 oz of sunflower seeds = 323 calories per day
At 2 oz per day Id need 46 pounds per year
One acre yield of sunflower seeds average 15000 pounds per year
Sunflower in shells = 46% shells
One acre yield of shelled sunflower seeds would average 8100 pounds per year.
To grow 2 oz of shelled sunflower seeds per day Id need .005 acres

Conclusion:
In terms of calories provided, it takes six times as much land to grow walnuts as compared to sunflower seeds.

If you wanted to be 100% raw and minimize your ecological footprint by eating both locally produced foods and food that maximized caloric yield per acre, your best bets from this small analysis would be to focus on eating apples and sunflower seeds.

from the Green Smoothie Experiment blog.
Mon Jun 02, 2008 2:08 am View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
tuffenoughtorock
Questioner


Joined: 30 Apr 2008
Posts: 52


Location: Iowa

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Very thorough! Very Happy
Mon Jun 02, 2008 11:29 am View user's profile Send private message MSN Messenger
vov35
Dirt-Under-The-Nails Hippy


Joined: 24 Apr 2008
Posts: 553



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Bananas have impressive yield. but potatos still pwn your soul!

of course, our climate doesn't support some of t foods you've mentioned.
where did you find this info?

_________________
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...but it invovles black masks and gasoline
Mon Jun 02, 2008 1:17 pm View user's profile Send private message Send e-mail AIM Address
UnMeilleurReve
Dirt-Under-The-Nails Hippy


Joined: 29 Apr 2008
Posts: 542


Location: Las Vegas

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I searched things like "food per acre per per person" and "how much land does a person need for food" etc. Sorry I didn't keep the links but luckily there wasn't much more useful on them.
Mon Jun 02, 2008 1:33 pm View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
glorfon
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Joined: 23 Apr 2008
Posts: 469



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Another thing to think about is the green houses.  We can probably have 3-5 layers of shelves of plants in those. So then we need to consider the hight of the plant and the depth of the roots.  Strawberries as well as most herbs I think would work really well in green houses to to shallow roots and short stature.
Mon Jun 02, 2008 5:23 pm View user's profile Send private message Send e-mail
vov35
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Joined: 24 Apr 2008
Posts: 553



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read this:
http://www.appropedia.org/Compost...provides_hot_water_%28original%29
I already posted this link in the "other" section

_________________
I have an american dream--
...but it invovles black masks and gasoline
Tue Jun 03, 2008 12:44 pm View user's profile Send private message Send e-mail AIM Address
UnMeilleurReve
Dirt-Under-The-Nails Hippy


Joined: 29 Apr 2008
Posts: 542


Location: Las Vegas

Post Reply with quote
You know, we have some greenhouses out here in the desert. I think I'll go tour one and find out what they grow.

However, maybe we should decide what we want to grow per acre? Like 2 acres of blackberries, 6 acres of potatoes, 4 acres of corn, etc.? Also, I guess when it comes to corn you grow it with 2 or 3 other plants and they supplement each other perfectly, and if you add in crop rotations you keep the necessary nutrients (though we need to look into effective, super-cheap fertilization methods).
Thu Jun 12, 2008 8:17 pm View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
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Staples of the Iroquois diet: corn beans squash
They are grown together as a mixed crop.
Worked well for native americans for hundreds of years, so why not us? =)
There is also a system called field rotation, wherein a field is used for 2 or 3 seasons and let rest for one. It just grows over with grass and grazing animals are sent out to pasture there.
Our space is limited, so not sure about the grazing animals part, but rotating fields will help to keep the production levels up.
Wed Jun 25, 2008 9:57 pm
UnMeilleurReve
Dirt-Under-The-Nails Hippy


Joined: 29 Apr 2008
Posts: 542


Location: Las Vegas

Post Reply with quote
corn beans squash, that was it! The magical 3.

And field rotation prevents malnutrition and keeps iron content of the crops up while reducing necessity for fertilizer. Yep.

Now we just need a mould-board and an ox to measure how many *true* acres we have, and we'll be set! If we get a donkey, we'll literally get medieval on that ass.

Oh god, I need sleep.

Welcome, Sparta.


Thu Jun 26, 2008 1:36 am View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
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