Slashdot Mirror


GPS Meets Agriculture for Precision Farming

mskfisher writes "NASA Science News is reporting a story on a NASA project called Ag20/20, which involves farmers using GPS-aided crop and field analysis to improve accuracy and yields. Instead of blanketing the whole area with a set level of pesticide or fertilizer, they can now vary it via computer, based on IR and soil data gathered from aircraft, satellites, and tractor-mounted sensors."

44 of 167 comments (clear)

  1. Well, sure, it's cool, but... by Control+Group · · Score: 2, Insightful
    ...don't we already pay American farmers enough to not produce/sell crops?

    --

    Reality has a conservative bias: it conserves mass, energy, momentum...
    1. Re:Well, sure, it's cool, but... by rosewood · · Score: 2

      Not no but hell know. Farmers are so grossly underpaid that many of them have no choice but to sell out to a corporation farm. Come here to KS during harvest and go to the co-op and find out how much they are paying for a bushell of wheat and ask any farmer dropping off about how much it cost him to grow that same bushell.

      Farmers are GROSSLY under-paid and under-apriciated

      Where the hell do you think all that food you eat comes from, the sky?

    2. Re:Well, sure, it's cool, but... by Waffle+Iron · · Score: 2
      Farmers are so grossly underpaid that many of them have no choice but to sell out to a corporation farm.

      Maybe that's just the natural economic result of modern technology. Ever since Henry Ford came along, very few cars have been handcrafted by individual proprietors. If such a crafstman tried to compete on price with major manufacturers, they would be grossly underpaid. Why would food be any different?

    3. Re:Well, sure, it's cool, but... by Wyatt+Earp · · Score: 2, Informative

      It would help if the value of grain by the bushel had ever increased.

      Right now the price of Hard Red Winter Wheat is the same per bushel as it was in 1902.

      Meanwhile, the cost of a tractor or a harvester has increased by about 10,000 percent.

      Actually, the amount of money paid American farmers isn't that much, and it keeps farms from going under and being turned into range land or housing developments.

      It helps keep the price of bread at the store the same decade after decade.

    4. Re:Well, sure, it's cool, but... by SnapShot · · Score: 2
      This will let us pay more farmers not to grow crops so they don't have to sell their farms to big corporations or turn them into housing developments.

      That's a nice theory but it doesn't hold up to scrutiny. About the only farms that get substancial government subsidies are wheat, corn, and other grain farms. Almost all of the subsidies go to huge corporate farms (who do you think can afford all of those lobbiests anyway?). And most of the subsidies go to areas where you're not going to have a huge amount of success building another housing development.

      On the other hand, the smaller, family-owned farms are often closer to cities (under a much greater tax pressure and regulation pressure to sell to a developer), selling crops that don't get subsidies (fruits and vegetables) , and, usually, subsidizing thier lifestyle with at least one other full time job. Check out Montgomory Co in MD or the Willamette Valley in OR for an idea on what the few remaining family farms look like.

      I'm not opposed to farming subsidies, but subsidies as they currently exists don't do anything that their supporters CLAIM that they do.

      --
      Waltz, nymph, for quick jigs vex Bud.
    5. Re:Well, sure, it's cool, but... by SnapShot · · Score: 4, Informative

      * The cost of the tractor per bushel has plummeted (how many acres could you seed, plow, etc. with that tractor in 1902)
      * And the cost of labor per bushel has plummeted (how many people did it take to harvest a bushel in 1902)
      * And the yield per acre as shot up (if they haven't then I guess Monsanto hasn't been doing their job)

      Like every other industry, farming benefits from efficiencies of scale.

      I am the last person on earth to want to see farm land turned into housing developments, but try not to be so simplistic that you insult your readers.

      --
      Waltz, nymph, for quick jigs vex Bud.
    6. Re:Well, sure, it's cool, but... by SnapShot · · Score: 2
      I know the reality of the farmers' financial situation. That is why I chose not to carry on the family tradition, as are many other people. The large corporate farmers are making quite a bit of money, the small family farms are not. And I don't know of any farmer in my area that has received a "bonus" or supplement from the government for being a farmer. Not a one.

      Other than the "American Patriot" rhetoric at the end of your post (farmers, as a whole, aren't any better people or harder working than your computer programmers, doctors, taxi drivers, carpenters, or McD's counter person, so save the sob story) I agree wholeheartedly with your post. I'm not against farms (especially family ones) but I am against simplistic statments that we are supposed to take at face value.

      What it really boils down to is this: congress wraps their farm-aid bills in the rhetoric of the family farm when you know and I know that the subsidies are going to a few huge corporate farms that have the money to hire lobbiests.

      Add this to the fact that farming benefits from economies of scale (sorry to repeat myself). Your family farmer has a few options:

      1. push for a socialist government like France's that is willing to ignore the realities of capitalism in exchange for allowing the family farmer to exist or
      2. expand until you have the land and resources to compete in a capitalist society (including the cost of purchasing your very own senator so you can get subsidies and avoid regulation) or
      3. sell out or
      4. find a small niche market that is approriate to the environment of your farm (if you only have 200 acres and you don't have enough water rights you are too small to plant corn, try growing Agave cactus for tequila or something...)
      --
      Waltz, nymph, for quick jigs vex Bud.
  2. What I wonder is... by FakePlasticDubya · · Score: 4, Funny

    Will this improve the quality of crop circles?

    --

    "We shall show mercy, but we shall not ask for it" -- Winston Churchill
  3. Hardly original by MiTEG · · Score: 5, Informative

    This is hardly original. A simple google search and one of the more interesting results here

    From the article:
    Indeed, perhaps only a decade or so hence, Isbell will climb down from his tractor holding a palm-sized computer in direct contact with Earth orbiting satellites.

    John Deere is already selling GPS-receiver equipped tractors (marketed as "StarFire receivers") that look about the size of a palm.

    --
    The future isn't what it used to be.
    1. Re:Hardly original by Genady · · Score: 2

      Wasn't that what GreenStar and InFielder were all about? Nice to see that Slashdot has caught up with early 90's AgTechnology.

      Just because we live in the Heartland doesn't make us Technological Morons.

      --


      What if it is just turtles all the way down?
  4. But the most important thing is... by gartogg · · Score: 4, Insightful

    the fact that satelite usage is now cheap enough to make this cost effective.

    We complain that space is not being pushed enough, and THIS is what will make people invest in NASA's technology. Whenever the demand exists for a product, the market finds a way to deliver it as cheaply as possible, in order to maximize profit margins. This is the technology that will enable the space industry to bring the cost per pound of lifting stuff down.

    Of all of the space stories in the past year that I have seen on /., this is the one that makes me most optimistic about the space program.

    The only part that worries me is that there are not enough satelites to fill current demand, so planes are being used instead as the inferior alternative.

    "Satellite images, which require more time to downlink and process, can take from 2 to 7 days to reach a farmer.

    Such delays won't be a problem forever, though. 'Technology is advancing quickly and more of these commercial satellites are being launched each year,' he added."

    --
    I'm a concientious .sig objector.
    1. Re:But the most important thing is... by pbkg · · Score: 3, Interesting
      Affordable.... Not likely for everyday farmers. For things like government agricultural departments, working with remote sensing peoples (people like surveying departments or should that be geomatic?), yes, it is affordable, but for a $1000+ an image, with the photo being a couple of days out of date, this becomes somewhat out of touch for most farmers. Normal fixed wing planes also cost too much for everyday use, unless of course you base the government department in a town that is very marginal, and since most of the town relies on the department staying alive, which leads to both political parties spending up big time, then this isn't viable either. Of course, the images produce by these planes are a heck of a lot better quality, remember, only a couple of years ago did we get
      Things like the Adelaide University (Australia) project involving photos taken by remote controlled plane with cameras attached, make alot more sense.

      Of course, another reason for the delay is because of the military checking of the photos to make sure they aren't of politically sensitive areas :P

  5. sorry but by westcourt_monk · · Score: 2, Informative
    Nothing new here, move along.

    The lumber companies in Canada have been using GIS to better map their harvesting. They also have reduced the impact by being able to better utilize the mesh of old bush roads. Plus they get a better idea of the size and age of trees by looking at IR images.

    GIS has also been used on farming with large farms - a farmer couldn't possibly monitor 1000's of hectres.

    Check the Faculty of Environmental Studies page at the University of Waterloo. They have all kinds of cool uses for GIS - sea ice studies are pretty interesting.

    --
    I am going to hell and I am going to take all of you with me.
  6. The man by DCram · · Score: 4, Funny

    Just another example of the man keeping the farmer down. First its GPS. Then its fences around the field. Next comes the little collars that were in that prison movie with Rutger Hauer that we can trigger to blow from space.

    While we are on that space theme i would like to say i would like to see a big laser make popcorn out of a whole field of corn almost like that real genious movie. Now that would be cool.

    WAIT!!

    Could that be why we are GPS'n the fields?

    Mmmmmmmm...popcorn.

    --
    If I were only smart enough to accomplish the things I dream about.. Or maybe too dumb to care.
  7. Re:GPS Dog Collar? by SILIZIUMM · · Score: 2, Funny

    Satisfied, he'll glance around his burgeoning field. "But wait," he wonders, suddenly puzzled, "where did my dog go?" Fingers snap. "I must've forgot his GPS collar again!"

    GPS jewels could be useful for (say) your girlfriend. Imagine, you go with her to the shopping center and suddenly you realize that she's gone somewhere else while you were looking at (say) computer games. Hence, you fire up your GPS reciver and trace your girlfriend in the shopping center :)

  8. Bravo! by Cally · · Score: 4, Insightful
    What an excellent idea! Let's save the environment by using geostationary and low earth orbiting satellites, remote sensing, advanced remote sensing, GPS navigation, image analysts... or what about zillions of nanobots, hovering over the fields, acting as a distributed AI 'hive mind'...

    Alternatively we could get a clue and start paying the farmers what the market will bear, instead of subsidising them to produce grossly-resource intensive crap that destroys our health, screws the environment, costs us billions in tax (for subsidies), whilst millions starve, and only agrichemical multinationals and food processors benefit.

    some , further reading...

    --
    "None are more hopelessly enslaved than those who falsely believe they are free." -- Goethe
  9. Not new by jweb · · Score: 3, Informative

    Growing up in rural Iowa (no stoplights within a 20 mile radius even today), I can tell you that this is not a new concept. Heck, I remember the local paper (no web site, they're that much behind the times) running a multi-part story about farmers using GPS in 1996 or 1997.

    --

    Think For Yourself. Question Authority.
  10. Yup by wiredog · · Score: 3, Informative

    At least since the late 80's. I used to read some surveyor/gps magazines (like GPS World) back then, my father is in the remote sensing field, and this sort of thing used to be reported on monthly. I remember one article where the farmer used DEM type maps, ArcView, a WADGPS system for accurate placement, and a Newton (remember those) for data collection.

  11. Valmont is doing it smarter by Zelet · · Score: 2, Informative

    This isn't really news. I suppose since it is being done with GPS it is "news for nerds" but Valmont industries (maker of Valley Sprinkler systems) has been putting sensors on their sprinkler systems for years. Then the sprinkler will talk to the farmers computer and let him know if there are problems with the soil or whatever else. The sprinkler also distributes fertilizer and the like automatically down to about 3 sq. feet.

    --
    ...And when they came for me, there was no one left to speak out for me." - Martin Niemoeller (1892-1984)
  12. Other neat GPS applications not mentioned by jageryager · · Score: 4, Informative

    As many have pointed out, precision farming is not a new thing. Check this link for a bunch of companies involved:

    http://www.prairielinks.com/aglinks/Farm_Equipme nt /Precision_Farming/

    The GPS allows them to do some neat stuff not mentioned in the article.

    Some systems can keep maps of the paths that equipment took traveling over a feild. This information can be used to guide the operator down the exact same path within an inch, or 2, on the next application. This can minimize crop damage from getting run over, and also reduces soil compaction.

    Some systems can be programmed to know how wide of a swath the equipment covers, and can then guide the operator to get very accurate coverage without skips or overlap. This functionality is particularly valuable when making applications that can not be easily seen by the operator, such as sprays.

    Better systems can even have a limited auto pilot feature that is integrated into the tractor. Once you are on track you tell the system to take over and it steers.

    Cool stuff!

    Kevin

    --
    "They that give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety"-B.Franklin
  13. So farmers are becomming geeks? :) by Romancer · · Score: 2, Insightful

    A trend of paying off farmers to limit their productions, while trying to improve their crop yeild with technoligy?

    contradiction in goals and practice?

    Perhaps not.
    If a farmer can use his rescources to the greatest possible result, he might be able to become self reliant again. Today most farmers are supplimented by govt. assistance programs. If the GPS system and other technological advancements help without raising the cost unreasonably. And the land that was needed was reduced in size and produced the same or more produce, this could free the farmers from needing assistance.

    --


    ) Human Kind Vs Human Creation
    ) It'd be interesting to see how many humans would survive to serve us.
    1. Re:So farmers are becomming geeks? :) by Mindwarp · · Score: 2

      Unfortunately this is unlikely to happen. The biggest problem with turning a profit in farming these days is the price of the commodity in the first place. My father-in-law owns a fairly sizeable (2000 acre) spread in Iowa, and only just breaks even WITH subsidy help. The prices of corn and soybeans (his staple crops) are so low that it's barely worth growing it.

      Ironically, having the smaller farmers going out of business doesn't often affect the price. The problem isn't over-saturation of the market with product, but the farming mega-corporations buying out the smaller farms and driving the independants who are left out of business by undercutting their prices. The livestock marketplace is already a business area where the smaller independant farmer can't now turn a profit. Pretty much everybody left working in it is now just a 'farm manager' for one of the big conglomerates.

      Sadly I think the days of the independant farmer are numbered.

      --
      The gift of death metal does not smile on the good looking.
  14. This has been going on for a while by El_Nofx · · Score: 2, Interesting

    My uncle has a combine that has GPS, he has had it for 5 or 6 years now. His boat has GPS, his car has GPS, hell, I think he even tracks his damn dog with it. That combine has a cd player and cost about ohhhhh a quarter million dollars, I think he even put a playboy rack in there

    --
    It's not the OS it's the user that sucks. If it's user friendly, you get stupider people. - clinko
  15. Yep, Cool Eh? by SkewlD00d · · Score: 2

    I worked for Trimble a couple of years ago, and they had essentially autonomous tractors using a system called AutoSteer. Using kinematic differential GPS, accuracy is down to 1cm.

    Construction equipment has 2 or 3 of these systems so slope can be maintained.

    --
    The biggest trick the devil pulled was letting lawyers become politicians so they can write the laws.
  16. Nothing new by rosewood · · Score: 2

    On my uncle's farm for the past 6 years +, he has been using GPS tools while in tractor and then back home to get better information on what exactly is going on. For example, if an irigation system dies, then it keeps the same possistion and he gets a page immediatly. If a tractor stays in the same possistion he knows something is wrong, immediate page. The GPS devices are also used to track rodent populations. We can go out, find out where the holes are and record their possistion. Then we combine that data year after year and know exactly how say the mole or ant population is in the fields. Another thing we used them for on the farm was ATV Paintballing ...

    1. Re:Nothing new by rosewood · · Score: 2

      Last year my aunt and my mother worked on a few of the fields that were out of rotation and just had some barley (i think) growing up that was to just let die. Well, once it got to be relatively tall, she used the GPS handheld to map out a big smiley face in the field and took the atv with miniplow out and made herself a big smiley face.

      She then used one of the satalite imaging places to take a good picture of it and made some caption like "The Happiest place on Earth, Kansas", had them printed and sells them as suveniers all over here in KS. That has net'd her quite a bit of cash

    2. Re:Nothing new by FFFish · · Score: 2

      Shhhh. The IRS will want to know.

      --

      --
      Don't like it? Respond with words, not karma.
    3. Re:Nothing new by rosewood · · Score: 2

      My aunt and uncle's farm has had a computer on it prolly longer then most geeks here have had one

      They have been using computers for longer then Ive been alive helping them with data

  17. at least 3 years old by maddogsparky · · Score: 2
    All the ludites in the farm industry are now out of business? My neighbor has been using GPS to record production when he harvests and uses the data to adjust the amount of fertilizer the following year. The adjustment is done in real time; he just has to drive the equipment like he always has.


    Farming is tough business. Its a high tech world--if you don't take every advantage of technology you can, you'll loose the farm in short order to someone who will.

    --
    science is a religion
  18. ummm... by jpellino · · Score: 2

    isn't the point to use this technology to cut down the blanketing of chemicals and make for a more judicial and economic use of chems? That's what we've been telling people since this started (this story is hardly new). Only problem I have with the whole scheme is the privatization of the data - it comes from the Landsat satellites - and a private corp gets to charge for them - big bucks too.

    --
    "Win treats sysadmins better than users. Mac treats users better than sysadmins. Linux treats everyone like sysadmins."
  19. Good News. by mlknowle · · Score: 2

    All of this is good news for American farmers, who have, for years, struggled to compete with the cheap labor in other countries. The only reason that most US farmers are still in business is because of inefficient government subsides; if the "american farmer" can be saved through effective technology and increased efficiency instead, all to it!

  20. Satellite tractors from Deere--how it works by texchanchan · · Score: 2

    Read more about some new GPS-equipped tractors in an article from the January Progressive Farmer, "Deere Leaps Into Autosteer."

    Excerpt:
    "The farmers most likely to buy AutoTrac are those with large operations that require many field passes...

    "Initially, [Deere] doesn't expect that will include a lot of row-crop applications. But it will include farmers who use wide tillage equipment or air seeders and farmers who have crops such as cotton that require a lot of field work.

    "Like retrofit autosteer systems that have been on the market for a few years, Deere's AutoTrac relies on positioning information from satellites. Onboard computers process that information and use it to electronically steer...

    "[How it works]...an operator makes an initial pass in a field as a computer records position information. The driver then turns the tractor at the headland, a computer screen helps him "acquire" a new parallel row and--at the push of a button--the computer takes control of the steering. The driver doesn't have to touch the steering wheel until he turns the tractor at the end of the new row....

    "Deere's AutoTrac gets its 10-centimeter accuracy from the company's StarFire network, which uses multiple ground stations, computers and relay satellites to send positioning corrections to customers anywhere in North America."

  21. Re:The World Already Produces Enough Food by weston · · Score: 2

    It has been shown that several smaller acre farms will outproduce a single larger industrial farm (in terms of production per acre).

    Hmmm. Can you cite? This would be an interesting figure....

    And it sortof contradicts what you say below... if it's not the quantity that matters any more, why does it matter that several smaller farms can outproduce.

    Is there a better distribution effect from several smaller farms?

    And how DO you solve the problem of distribution?

  22. Re:This is 6+ year old technology by killthiskid · · Score: 2

    Agreed. And on top of that, the findings were that it didn't help. They found that the areas that did not yield well did not improve with application of more fertalizer. And there is only so much fertalizer you can put on a given spot. It basically came down that it was best to just use the same amount all over, as there was not even enough gain to evercome the added time and effort (read: money).

  23. Re:This is 6+ year old technology by sheldon · · Score: 2

    "And there is only so much fertalizer you can put on a given spot. "

    Umm, that's sort of the point. If the soil won't benefit from the fertilizer, there is no point in applying it because it will just run off into the water system.

    Using this technology they can also vary the rate at which seeds are put in the ground. Since some soil will support more plants than others, this saves the cost of seed in the bad areas.

    The debate when I was working with this back in 1994 was the cost/benefit analysis. At that time the equipment was incredibly expensive. A good GPS receiver was at least $5k, and a computer powerful enough to process the maps another $5-10k. Not to mention the equipment from Agchem and others to do variable rate application.

    The costs of much of the technology has come down dramatically since then. That $10k computer back then is less powerful than what you can buy for $500 today, same with the GPS receivers and so on.

  24. Been doing this for at least three years by lindsayt · · Score: 2, Informative

    My cousin-in-law is from an Iowa farming family but has a knack for technology. The result is, he started working with an Iowa company to develop and deploy these a few years ago. They've been deploying these in the field (quite literally)for the last three years; he gave me an excellent demonstration at Christmas last year. They can tell everything about crop yields and, most significantly, remember the information and send it to a unit in the fertilizer spreaders to make sure the parts of the field with the lowest yield receive the most fertilizer. His father's farm, which has been doing this for three years, has already seen a more even distribution (and hence large overall production) across their 400 acres.

    --
    I did not design this game/I did not name the stakes/I just happen to like apples/And I am not afraid of snakes-AniD
  25. Re:The World Already Produces Enough Food by greensquare · · Score: 2, Insightful

    >In a system of larger agricultural farms, farm owners tend to be very rich and farm workers are very poor: the rural economy is transformed from one of self-suficiency to one in which farmers are forced to make livings as wage earners. The point is, more small farms means more farmers producing for themselves rather than becoming dependent on the poor wages derived from farm work.

    The problem with small farms here in America, is that the economics of food, combined with the overhead of our society, has made it very hard to keep a farm that is small enough to be run by a typical family.

    Farms must get bigger in order to make enough to stay in business. We all bitch and moan if the price of milk goes up by a nickel a gallon. After the grocery, and the middle men, and the processors all take their cut, that leaves about 1 penny for the dairymen. In USA the price of milk to farmers right now is about what it was in 1981. You can bet everything else has gone up.

    Even the small diversified subsistance farmer, who plans to grow a variety of crops and products that he can eat and use himself, still needs to make enough money to pay local taxes, school taxes, state taxes, federal taxes, sales taxes, a mortgage, and put his kids through 4 years a Cornell.

    Kevin

  26. Technical or social solutions? by Per+Abrahamsen · · Score: 3, Insightful

    It is scary what get marked as "insightful" here.

    Producing more and more food in an environmentally healthy way is basic requirement due to the population growth.

    This is completely ortogonal to the question of solving the social and political problems that provent a fair distribution of the produced food and keep the population growth going.

    Even if we do solve these problems in the best case we should expect the population to top in one or two generations at 15 to 20 billion people, due to the age distribition of the world population, and cultural resistance to change.

    We need to fight at both fronts to get through this situation without mass starvation worse than everything seen on this planet before combined.

    We need the technical means to increase production that much without destroying the environment in the process, and we need the social, economical and political changes that ensure this technoclogy is employed as well as ensure the population growth does eventually top in acceptable ways.

    Believing we can get through with either technical or social changes alone is dangerously naive.

  27. Let me know . . . by JJ · · Score: 2

    when this same technology is applied to

    a) crop dusting

    b) organic farming

    (And no, the two are not mutually exclusive!!)

    --
    So long and thanks for all the fish . . . !!!
  28. Re:This is 6+ year old technology by killthiskid · · Score: 2

    True. I personally know a large family farm that did this a while back (4 years or so???). They have decent land.

    After going through all the analysis and work, they had a net loss over all, because at the end of it all, there was so little land where the research dictate a change that it was MUCH more cost effective to just ignore it all together.

    This would probably be different if more of the land would dictate a change in behaivor.

    I might also add that they farm A LOT of land, and that they are very good in terms of conservation, crop rotation, and so. They farm for profit, and they do that by properly sustaining their land.

    And they're good people, too.

  29. Re:This is 6+ year old technology by sheldon · · Score: 2

    I used to work in this industry. We sold software and services that did the GIS/mapping work from the data collected from Agleader yield monitors, etc. Actually our company was about 1/2 mile down the road from Agleader.

    We only worked with Independent Ag consultants, and what you say is correct. There was a lot of manual labor involved collecting GPS positioned data... soil samples, insect and weed locations, etc. Then over the winter all of this data would be collected together and plotted into plans for the next season. It was a feedback loop of sorts.

    But I agree, that cost/benefit analysis is a big part of it. At the time I was in this, there was a suspicion that the EPA was going to get involved and start changing the rules on pesticide application, etc... which would mean you pretty much had to go to variable rate application in order to comply.

  30. This is my Job by Tsu-na-mi · · Score: 3, Informative

    I write software for this industry for a living. We collect field boundaries, fertilizer and pesticide data (types and amounts used, application method), and other farming practices. When it comes time to harvest the crop, a device called a yield monitor (GPS plus flow and other sensors) collects data on how much crop is harvested at a given point in the field.

    It's an idea that had been gaining a lot of momentum in the farming industry for a while, but it is starting to become apparent it is not as useful as they thought. The growers like the pretty pictures the GPS maps give them, but their utility as tools is severely limited. Changing levels of chemical application in a field does not have as much of an impact as you would think. Not to mention the education level of the average ag worker is not all that high, so data collection is a difficult process.

    What IS useful however is statistical analysis of these farming practices. Seed companies like Pioneer have universities run tests on their varieties and report on the results. The problem is that these tests are all conducted on tiny "test plots" of a fraction of an acre. It's simply too small a sample to get reliable results. With the data we have collected, we can state with a fair degree of certainty what farming practices will result in higher yields. Conventional vs No-Till farming, what crop order to rotate, what row spacing to plant at, etc.

    --
    David Christpher Asher
    AgVenture, LLC.

    --
    I've built up so much character I have an alter-ego
  31. three waves of technology by peter303 · · Score: 2

    Alex Toeffler wrote a book a decade ago on the different waves of technology- agriculture, industry, and tech/knowledge. The eariler waves don't disappear, but are enhanced by the later waves. Agriculture is enhanced by both industry and high tech.

  32. Re:This isn't really news by CowbertPrime · · Score: 2

    Discover or Popular Mechanics or some magazine had an article on this in 1994 also, right after .mil removed the accuracy restrictions on civilian GPS receivers.