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Tuesday, March 8, 2011

Organic Strawberries Just Taste Better

Living in South Florida this time of year, the supermarkets are filled to capacity with inexpensive conventional strawberries that look great but are, quite frankly, tasteless despite that they are grown in the region.  I know of many people who believe that organic produce simply tastes better than conventionally grown produce but the taste difference almost certainly has less to do with organic or non-organic agriculture techniques and more to do with a number of other agriculture factors.  Farmers have a range of different and competing market objectives that they can choose in how they produce their strawberries.  For example, here are two extremes of different market focuses that farmers can target: 

  • Focusing on minimizing total cost per bushel and growing a durable berry that can handle transportation to distant markets without damage
  • Focus on growing berries for a local market that is more focused on flavor and less focused on price

The choice in the farmer's focus means totally different production values just as Kia building a subcompact car has different production values than Rolls Royce building a luxury car.  Having experiencing a Kia subcompact and an Rolls Royce, you can't make a blanket statement comparing cars made in England vs. cars made in South Korea any more than you can make a blanket statement about the flavor of organic vs. conventional agriculture methods.

A farmer that focuses his berries on flavor and premium price will probably grow berries with greater spacing giving each plant more sunshine and allow greater root structure development for better water absorption (less irrigation).  A farmer with this focus may also choose to grow for a longer growing cycle and pick the berries closer to their optimal ripeness for a more ripened on the vine flavor, color and sugar content.  Growing berries for flavor and a premium market can be done with organic or non-organic fertilizer and insecticides (strawberries are nearly universally grown through plastic sheets to eliminate the need for herbicides and tilling regardless of whether they are organic or not). 

What makes them premium flavor (and cost) is not the organic choice over non-organic but all these other choices the farmer makes in his growing methods.  Growing this way will also imply a lower asset utilization--meaning lower yield per acre, lower yield per gallon of fuel and lower yield hour of tractor time not to mention lower yield per hour of farm labor per bushel of output.  Quite simply growing for flavor is more costly by being less "efficient."

By contrast, growing berries for "tonnage"--low cost, high output and durability--implies that berries are going to be planted very close to each other, fertilized intensively forcing fast growth, irrigated aggressively and picked early for durability and for gas ripening close to the berry's final market.  The good news, is that growing this way reduced the amount of land required per bushel and is fundamentally less expensive particularly from an asset utilization, energy and labor cost.  To fertilize so intensively, it is far more likely that a farmer with this market focus will use non-organic fertilizers because they are easier to handle and apply in greater density than organic fertilizers.

I maintain that these farmer choices beyond the organic vs. conventional fertilizer and insecticide choices make the biggest impact on fruit flavor.  The reality is that organic growers are ALSO targeting the premium market so of course they taste better.  The premium market also places more value on the berries being organically grown and since it is unheard of for a premium berry to be not organic just as it is unheard of for a tonnage produced berry to be grown with organic methods.  There is, therefore, little opportunity of a real comparison between berries made using the same agricultural techniques and market objectives and just varying in their type of fertilizer and insecticide.  Better taste of organic berries may very well just be a side affect of these other factors.

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The Fallacy of Comparing Yields

I see articles from time to time suggesting that organic yields can be equivalent to conventional yields.  Inevitably, they compare an organic field using very high labor and energy applied (in other words, relatively unconstrained in their use of certain inputs) to a conventional field that has to be profitable on world commodity price levels (in other words, constrained in their use of inputs).  The only way to properly compare the two is to hold the state variables constant. 

What I mean by that is that in order for yield comparisons to be done with some reasonable sense of accuracy it has to be done for a given amount of energy, for a given amount of labor and equivalent fields with equivalent moisture and drainage, etc.  This is simply not happening.  Comparisons are made between high input organic farms like the Rodale test farm against USDA average numbers for the county in question or nationally.  It would also be interesting to compare yields for a given amount of expense whether that expense is used for energy, labor, fertilizer or transportation while holding field, soils, drainage, moisture, etc. constant.

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Friday, February 25, 2011

The Soil Biodiversity Aricle I Have Never Seen....

Much has been written about soil bio-diversity.  The basic premise is that intensive agriculture and intensive use of pesticides, herbicides and fungicides leads to less soil biodiversity and this is bad for the overall ecology.

I am not disputing that typical organic agricultural practices provide better soil biodiversity, the question I have is this:  Is this a result of the pesticides or is this a result of the higher density agriculture?  Does anyone consider that in an organic agricultural environment, more acreage needs to be planted per bushel so that if production is converted to organic agriculture, some land that is currently fallow (with rich biodiversity) has to be put to the plow.

In other words, the real comparison between organic and conventional agriculture methods in the area of biodiversity is to look at comparing organic fields with the combination of conventional and fallow fields that would need to be cultivated if the fields were converted to organic production.

Said differently:  Organic agriculture can claim that their farms have higher biodiversity but one must factor in the additional amount of land needing to be put the plow.  If the organic agriculture has a 20% lower yield, than the comparison should include 20% (or more) of woodland included in the conventional tally.  In other words it makes no sense to compare the biodiversity within an acre of farmland farmed conventionally vs. organically unless one considers that more fallow land will need to be put to the plow for organic agriculture for the same amount of OUTPUT.  It is really a question of biodiversity across full ecosystems for feeding whole populations, not an acre vs. acre comparison.

My making this point should seem obvious and it is shocking that no one makes writes an article that considers the whole ecosystem.  Is it because they are trying to spin an article to support their biases by ignoring this point or are they just that naive?

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Monday, January 3, 2011

Its Tough To Make Comparisons

It amazes me how difficult some comparisons are.  Here I try to focus on the comparison between organic and conventional agriculture and the more I look at it the more I see incomplete comparisons and faulty methodologies.  If I can see these issues as an outsider, how can those who are supposed experts not see them or not address them.  It is generally shocking to me how few books on agriculture are available on places like Amazon, how few blogs there are, and how little discussion and debate there is.

I came across a few interesting blogs and articles recently that highlight this issue of being able to make a good comparison.  The first article is a comprehensive comparison of the costs and benefits of having a artificial vs. natural Christmas tree.  It should be simple, right?  Plastic trees are reusable and should be better for the ecology right?  Not so simple, take a look.


So much of the analysis depends on how many years the Christmas tree is in use and what is done with it at the end of its useful life. Natural trees contribute to carbon sequestering right?  Not so fast.  Do yourself a favor and just read the executive summary.  So much has to do with what is essentially the weighting factors in the analysis.

The same issues are at play with the discussion of whether it is better for the environment to use paper vs. plastic bags.  I like this blogs covering of the topic.


Bottom line is this:  Paper really doesn’t biodegrade in a landfill so the biodegradability issue is really off the table.  Both bags are resource intensive for their single use and a lot has to do with where you bags come from and the trade off of fossil fuels vs. water with paper needing much more water to be produced and, of course, plastic being a fossil fuel.

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