Archive for May 2010 | Monthly archive page
Don’t be fooled by imitations. While there are several hundred (if not thousands) of species of Bamboo, there are also a handful of lookalikes to be aware of, and perhaps avoided. Last year we told you about that friendly desktop pot of Lucky Bamboo that you probably thought belonged to the Bamboo family. Don’t worry, we forgive you. It was an honest mistake. The folks at the hardware store just wouldn’t sell as many if they labeled them “Lucky Dracaena”.
Today we’d like to tell you about an invasive reed grass clogging the creek beds of southern California, and spreading vigorously. From a distance and to the untrained eye, it will look a lot like Bamboo, but it’s actually a Mediterranean import known as Arundo donax or giant cane, although it’s sometimes even referred to mistakenly as Arundo bamboo.What is Arundo donax and why is it a problem? Aggressive growth habit: As you probably realize, or perhaps have even witnessed, many varieties of bamboo can also be very invasive. What starts as an ornamental accent or an oriental privacy hedge can spread into a horrible nuisance under the right (or wrong) conditions. This is what we call “sustainability in its unfriendliest form.” While it makes a beautiful addition to many domestic landscapes, Bamboo does require proper containment. This can be as cheap and simple as an old wine barrel, or as expensive and complicated as you want to make it. Otherwise it will spread and spread, generally in the direction of water, such as lawn sprinklers. Invasive species: Unlike Bamboo, Arundo donax is native to the Mediterranean. This means that California climate conditions are ideal, with or without the irrigation required by most species of Bamboo. It was brought over in the 1820 for erosion control in the Los Angeles area, and in the subsequent 190 years has established a tenacious foothold throughout the region, but especially in riverbeds. Predator resistance: As with most invasive, non-native species, Giant Cane has no real predators in this part of the world, so it continues to spread while choking out the native flora. Ideas for containment range from toxic chemical herbicides (not necessarily something we like to see sprayed around creeks and river beds) to the importation of natural predator insects from the other side of the globe (can you say “unanticipated environmental consequences”?). Toxicity: One reason that the Arundo donax is so resilient against local insects has to do with the high levels of noxious chemicals in its leaves and stems. As it so often happens in plant chemistry, many of these “toxic” chemicals also happen to be psychotropic alkaloids and tryptamine compounds. So while it may lack most of the industrial applications that Bamboo is known for, this giant reed grass may have certain pharmaceutical and/or recreational uses yet to be fully explored. Elegance and durability: The Giant Cane has historically been used for flute making and is also said to be an ideal material to make reeds for woodwind instruments. But, the canes are not nearly as hard and durable as Bamboo, but it does get very tall (upwards of 20 feet) with fairly thick canes (over 1″ in diameter). But despite its size and feasibility as a privacy screen, Arundo donax does not have nearly the same grace and elegance as a healthy stand of bamboo. Fire hazard: Highly flammable, the cane grass has been known to increase the probability and intensity of wildfires. And what’s worse, it has a far better burn-recovery rate than any native species, so that when the landscape is decimated by fire, the canes sprout up first, leaving no room for the original natives to return or survive. Along with the factors listed above, these characteristics seem to make the Giant Cane’s invasive potential far worse than that of bamboo. Potential benefits of Arundo donax?
We’ll spelled out a litany of threats and detriments posed by this giant reed grass, but surely it must have some positive attributes? Yes, in fact, with increasing concern over climate change and greenhouse gasses, Arundo donax has been identified as having a relatively high capacity for converting carbon dioxide into oxygen (somewhat similar to bamboo) and for sequestering carbon in the soil. For this reason, it is sometimes planted as a cover crop and rotated between cereals and grains.
Also, on account of its carbon sequestration and its tenacious growth habit, giant cane grass is now be recognized as one of the most promising crops for bio-fuel and energy production in Europe. Several energy companies are currently working with Arundo donax and studying its potential more closely.
In the meantime, unless you’re planting a cover crop or using your backyard to produce bio-fuel, we encourage you to avoid the Arundo donax and plant some more attractive varieties of bamboo instead. But be careful, these grasses all tend to spread aggressively, and if you don’t take proper precautions, you too could find yourself on the wrong end of a sustainable revolution!
Photo Credit: Wikipedia
The picture above shows Mahatma Gandhi spinning his own cotton in protest of British Imperialism, similar to the more famous demonstration where he and his followers collected their own salt on the beaches of Dandi (Salt Satyagraha) in 1930.
Gandhi also made the following observations about the economics of Indian cotton and the systematic exploitation of Indian for her raw materials under British rule.
Step 1: English people buy Indian cotton in the field, picked by Indian labor at seven cents a day, through an optional monopoly.
Step 2: This cotton is shipped on British ships, a three-week journey across the Indian Ocean, down the Red Sea, across the Mediterranean, through Gibraltar, across the Bay of Biscay and the Atlantic Ocean to London. One hundred per cent profit on this freight is regarded as small.
Step 3: The cotton is turned into cloth in Lancashire. You pay shilling wages instead of Indian pennies to your workers. The English worker not only has the advantage of better wages, but the steel companies of England get the profit of building the factories and machines. Wages; profits; all these are spent in England.
Step 4: The finished product is sent back to India at European shipping rates, once again on British ships. The captains, officers, sailors of these ships, whose wages must be paid, are English. The only Indians who profit are a few lascars who do the dirty work on the boats for a few cents a day.
Step 5: The cloth is finally sold back to the kings and landlords of India who got the money to buy this expensive cloth out of the poor peasants of India who worked at seven cents a day.
(Fisher, F.B., 1932 That Strange Little Brown Man Gandhi, New York: Ray Long & Richard Smith, Inc.)
With deep gratitude to the investigative journalism of Michael Pollan and to the burgeoning intrusion of natural fiber alternatives into the fashion industry, the general public is growing increasingly aware of the need for a revival of sustainable agriculture. In a climate of concern and sometimes desperation, buzzwords like green, organic and sustainable may be cast into the breeze like so many granules of pollen, but they mean little without a proper context for understanding the roots of this thorny issue. Agronomy is not a subject to be mastered overnight, but one to be studied over the seasons of a lifetime. For now let’s consider the modern method of monocropping.
In the past 80 years or so, the art and science of agriculture has undergone an astonishing transformation in order to keep up with the hyperbolic rate of world population growth. The need to extract an ever-growing quantity of produce — whether for food, fuel or fiber — from a planet of limited resources has required a massive wave of innovation among an ever-shrinking number of increasingly specialized farmers. The capacity of these mega-farms to meet the demand of global consumption with sufficient supply and minimal prices represents a genuine triumph of modern civilization. But (you knew there’d be a but, right?), at what cost?
One of the key components of this hyper-efficient system of modern farming involves the technique of cultivation called monoculture, growing huge areas of a single crop, such as the millions of acres in and around Iowa farmed exclusively for corn. If you visit almost any major farm in the world, you will see this technique in practice, row after identical row of crop X, bred to perfect uniformity and invariable mediocrity. The tidy, geometric rows may bear a certain appeal to the post-industrial, minimalist sense of aesthetic, but the impact on both the farmland and the finished product can be detrimental.
In the old days of subsistence farming, a family would plant variegated rows of roots, tubers and vegetables to ensure themselves a diverse diet come harvest time. But because each crop has its own soil nutrient and water needs, not to mention pruning and harvesting methods, this method of “polyculture” is certainly not the most efficient for large scale production. On the other hand, it does tend to yield a more nutritious and full flavored product with minimal pest and disease issues.
These are the chief problems we can associate with monocropping. When thousand of acres of broccoli or cotton, for example, are cultivated en masse, they are guaranteed to deplete the soil of those specific nutrients that broccoli or cotton use most. Industrial agriculture addresses this issue with the heavy application of chemical fertilizers. Residue and run-off from these petrochemical fertilizers has been demonstrated to be potentially harmful to both the habitat and the end consumer.
Secondly, monocropping results in the crop’s severe vulnerability to pests and diseases. An unnaturally high concentration of a given plant is sure to attract and support an unnaturally high number of whichever pests thrive on that plant, while their natural predators will remain absent or ineffective. Likewise, a plant-specific disease could spread like the plague across the exposed acreage of monoculture. Again, these man-made challenges are overcome with manmade solutions, i.e. the heavy application of pesticides and insecticides, with whose risks we are already familiar, those which chemical companies like Monsanto fervently deny.
How to draw the greatest efficiency out of a plant without chemically-intensive monocropping is a leading concern among organic farmers. Many have simply resorted to the use of more natural and organic fertilizers, animal-derived but industrially produced. But we might also look to nature for her solutions.
Unlike cotton and broccoli, there are a number of plants that actually thrive in monoculture conditions. Take the giant redwood, for example. They can stand alone, with reasonable success, in parks and gardens up and down the west coast, but only in vast swaths do they truly thrive. In their native habitat, these evergreen macro-organisms generate a climate of their own, attracting storm systems to satisfy their unquenchable thirst, while also sheltering one another from the high winds. As these old-growth forests shrink, the viability of individual trees is put at peril. That ecological sensitivity makes redwoods less than ideal as a crop for commercial cultivation, but under responsible forest management, other trees can be grown and harvested for lumber with a minimal environmental impact.
In addition to certain trees, many grasses also thrive in a monoculture. One of these grasses is bamboo. Not only does it renew itself with ease (similar to your front yard after it’s mown), and grow at record rates of several inches (even up to a couple feet) per day, but it also flourishes in the modern farmers’ ideal setting: the monoculture. Hence it can be cultivated on a commercial scale with minimal unnatural assistance. As a lumber alternative, its rate of renewability outpaces most trees by about 10 or 20 to one. As a fiber alternative, it leaves cotton in the dust; conventional cotton, after all, is subjected to more heavy chemical crop dusting than any other plant on the planet.
So if you’re concerned about sustainable agriculture, you need to be thinking about alternatives to unnatural monocropping. But if you’re interested in agricultural efficiency, you may find the large scale of monoculture all too enticing. While something of a botanical phenomenon, bamboo cannot and should not replace replace every other source of lumber and fiber on the planet, but it certainly cannot be ignored. It must play a major role in the global polyculture of the future, as we struggle to meet the needs of a shrinking planet, a mushrooming population, and an overburdened environment.