When I stumble apon articles like this, it's easy to doubt the future of humankind. Apparantly, there is a serious proposal to dump hundreds of millions of tons of stalks and straw in the ocean in the name of carbon sequestration! How have we come to the point where straw is no longer seen as the valuable resouce and source of soil fertily that it is and rather as a waste so dangerous that it needs to be barged out to sea? Nature makes no waste, everything has it's purpose. Why isn't this straw simply being returned to the soil? It could simply be plowed in directly, it could be hauled to the side to be composted, it could be used first as animal bedding, (or it could given to me!), however it gets there just get it back to the soil! Otherwise this would simply exacerbate the severe soil degradation that has already occured from little more than 100 years (a blink of an eye in the Earth's timeframe) of agriculture on North America's prairies.
That's not even mentioning the effects this will surely have on the ocean's ecology.
Showing posts with label soil fertility. Show all posts
Showing posts with label soil fertility. Show all posts
Wednesday, February 18, 2009
Friday, February 13, 2009
Edemame Soybeans
Although it's freezing cold today, it's nice to think about the garden that will be flourishing in just a few more months. Here's a little article I recently wrote on a favourite crop of mine that I feel should be far more widely grown in Nova Scotia:
Edemame soybeans are both one of my favourite vegetable crops and one that’s very under-utilized. Unlike the more common beige soybeans that are usually used for tofu and animal feed, edemame soybeans have been bred for flavour and are picked fresh when they’re plump in their pods like peas. They’re much more popular in Asia where the way to prepare them is to steam them lightly (one minute if fresh, 3-4 if frozen), before popping the seeds directly into your mouth one by one. The ultimate slow food! Like all vegetables really, the difference in taste between edemames fresh from your garden and the frozen ones from a bag (grown in China) is incomparable. It’s a mystery to me why all the store-bought edemame soybeans are from China when they’re so well adapted to growing across so much of Canada.
The soybean plant grows to about thigh height on good soil, depending on the particular variety. Being legumes, soybeans fix nitrogen which allows them to grow on poor soils. However, like all vegetables you’ll have much better results planting them in healthy, fertile soil. They like heat but nothing we can't provide in the Maritimes. If you can grow beans or corn in your area you can grow soybeans! They’re more drought tolerant than most other plants and they shouldn’t need any watering after they’re established. I plant mine in early June after the last frost in wide rows (multiple rows in a strip between walkways, as opposed to single rows) which creates a dense canopy of foliage that shades out weeds. Planting father apart would give a higher yield per plant and a similar yield overall, but without the weed suppression that a dense planting provides. If you have limited seeds you might prefer a wider spacing than me. The pods should be ready to harvest in late August. The seeds should be plump but not overripe (think a perfectly ripe pea pod).
I really think that edemame soybeans deserve to take their place alongside the more common vegetables in Canada. They grow so well in our climate that it’s insane that we should have to import them from the other side of the planet from a country with such a suspect record of food safety. There's no better place to get the ball rolling than in your own garden!
Aside from me of course here are a few Canadian seed sources of edemame soybeans:
Salt Spring Seeds (http://www.saltspringseeds.com/)
Prairie Garden Seeds (http://www.prseeds.ca/)
Heritage Harvest Seed (http://www.heritageharvestseed.com/)
Mapple Farm (email: winggate@nbnet.nb.ca)
Edemame soybeans are both one of my favourite vegetable crops and one that’s very under-utilized. Unlike the more common beige soybeans that are usually used for tofu and animal feed, edemame soybeans have been bred for flavour and are picked fresh when they’re plump in their pods like peas. They’re much more popular in Asia where the way to prepare them is to steam them lightly (one minute if fresh, 3-4 if frozen), before popping the seeds directly into your mouth one by one. The ultimate slow food! Like all vegetables really, the difference in taste between edemames fresh from your garden and the frozen ones from a bag (grown in China) is incomparable. It’s a mystery to me why all the store-bought edemame soybeans are from China when they’re so well adapted to growing across so much of Canada.The soybean plant grows to about thigh height on good soil, depending on the particular variety. Being legumes, soybeans fix nitrogen which allows them to grow on poor soils. However, like all vegetables you’ll have much better results planting them in healthy, fertile soil. They like heat but nothing we can't provide in the Maritimes. If you can grow beans or corn in your area you can grow soybeans! They’re more drought tolerant than most other plants and they shouldn’t need any watering after they’re established. I plant mine in early June after the last frost in wide rows (multiple rows in a strip between walkways, as opposed to single rows) which creates a dense canopy of foliage that shades out weeds. Planting father apart would give a higher yield per plant and a similar yield overall, but without the weed suppression that a dense planting provides. If you have limited seeds you might prefer a wider spacing than me. The pods should be ready to harvest in late August. The seeds should be plump but not overripe (think a perfectly ripe pea pod).
I really think that edemame soybeans deserve to take their place alongside the more common vegetables in Canada. They grow so well in our climate that it’s insane that we should have to import them from the other side of the planet from a country with such a suspect record of food safety. There's no better place to get the ball rolling than in your own garden!
Aside from me of course here are a few Canadian seed sources of edemame soybeans:
Salt Spring Seeds (http://www.saltspringseeds.com/)
Prairie Garden Seeds (http://www.prseeds.ca/)
Heritage Harvest Seed (http://www.heritageharvestseed.com/)
Mapple Farm (email: winggate@nbnet.nb.ca)
Saturday, January 10, 2009
A New Mindset on Soil
More than anything else, the primary role of the organic grower should be to nurture a healthy and fertile soil. As long as the soil is healthy it will produce healthy plants that will proliferate with few other inputs from their human caretakers.
Agricultural and garden soil is really an ecosystem unto itself, but one that could be thought of as having a symbiotic relationship with humans. Unlike the soils of undisturbed forests or meadows, which, since the last ice-age, have been steadily increasing in organic matter and biodiversity, garden soils don’t have a constant source of fallen leaves, dead wood, or grass roots to decompose and add fertility and humus. To avoid degrading the long term health of the soil in our efforts to grow our species’ favoured plants, we need to make an attempt to replicate these soil building systems ourselves.
In any natural ecosystem, organic matter is primarily produced by plants at the point of photosynthesis and eventually added to the soil as they decompose. Without disturbance, these systems would continue increasing the soil fertility indefinitely. Because through agriculture we have replaced the natural order of things that kept the soil healthy, we can‘t just extract the biological wealth (existing humus) from the soil without also adding more biological wealth (compost, manure, leaves, straw, etc.) to replace it. Organic matter, in one source or another, should be added in regularly and in generous amounts. Especially on poor, already depleted soil it’s important to provide a boost of organic matter in order to get things started. In parts of Asia for example, the same farmland has been cultivated continuously for over 4,000 years and it’s perhaps more fertile now than it was at first. This is a major contrast from much of North America, were, in many cases, a few hundred years of human disturbance has left the once rich soil exhausted. This disparity is due in large part to the high emphasis in Asia on increasing organic matter in the soil through utilizing absolutely all available sources of organic matter and using lots of manure (both animal and human).
On our farm we produce quite a bit of manure from our animals, which we compost and spread in the garden after one year. All of our garden debris (stalks, vines, vegetable scraps etc.) is either composted or tilled directly into the garden, or in the case of vegetable scraps, fed to the goats and recycled into the garden through their manure. Leaves from the woods can be used for mulching and composting. We buy old hay from a local farm both for mulching and for animal bedding, which could be seen as bringing in fertility from elsewhere to improve the fertility here. Perhaps there is something to be said for that, but long term I’m aiming to have more of a closed circle of nutrients both generated and utilized on our farm, keeping everything fertile without needing to rob that fertility from another farm.
As well as regularly adding compost and other organic matter, a soil building practice we do a lot of is growing green manure crops to be tilled back into the soil. We try, as much as possible, to avoid having bare ground in the garden. Whenever there is no food crop to be grown, you may as well be using the space for growing organic matter in situ. We grow primarily buckwheat as a green manure in the summer, as well as oats and winter rye in the fall and winter.
I always notice a dramatic increase in earthworms and other soil life after we add any source of organic matter to our formerly depleted soil. Also dramatic is the response of plants to at last have a healthy, living soil to grow in. The areas of our garden that we have focused on enriching produce much hardier, self reliant plants. The scraggly Jerusalem artichokes that we inherited with the farm grew to eight feet last year after having compost spread over them, while the half of their bed that didn’t receive the compost grew to a mere two feet.
When you think about it, soil is one of the most crucial resources that we require to survive. The foot or so of topsoil that covers the world’s agricultural areas is what our species is totally dependent on to produce food. It took thousands of years of natural processes for that vital resource to develop, so it’s of tremendous importance not only to preserve but to enrich what we have left. A mere handful of healthy soil has countless billions of individual micro-organisms, consisting of thousands of species ranging from bacteria to fungi to nematodes. This is why it's important to think of soil as an ecosystem rather than simply as a medium for growing plants. When any ecosystem is healthy all of it’s species have the opportunity to thrive, in this case that includes our garden plants.
This gardening philosophy is a quite a shift from the predominant mindset that got us into so many of the ecological problems we’re dealing with today, the view that we should have total control over the ecosystems in which we live and that all life in the garden other than our cultivated plants are enemies and competition to be destroyed. That’s an outlook on nature that we’re going to have to collectively overcome, for the sake of all life on earth, the sooner the better.
A soil building green manure crop of buckwheat. I scythe it down late in its flowering period to be tilled into the soil.
Agricultural and garden soil is really an ecosystem unto itself, but one that could be thought of as having a symbiotic relationship with humans. Unlike the soils of undisturbed forests or meadows, which, since the last ice-age, have been steadily increasing in organic matter and biodiversity, garden soils don’t have a constant source of fallen leaves, dead wood, or grass roots to decompose and add fertility and humus. To avoid degrading the long term health of the soil in our efforts to grow our species’ favoured plants, we need to make an attempt to replicate these soil building systems ourselves.
In any natural ecosystem, organic matter is primarily produced by plants at the point of photosynthesis and eventually added to the soil as they decompose. Without disturbance, these systems would continue increasing the soil fertility indefinitely. Because through agriculture we have replaced the natural order of things that kept the soil healthy, we can‘t just extract the biological wealth (existing humus) from the soil without also adding more biological wealth (compost, manure, leaves, straw, etc.) to replace it. Organic matter, in one source or another, should be added in regularly and in generous amounts. Especially on poor, already depleted soil it’s important to provide a boost of organic matter in order to get things started. In parts of Asia for example, the same farmland has been cultivated continuously for over 4,000 years and it’s perhaps more fertile now than it was at first. This is a major contrast from much of North America, were, in many cases, a few hundred years of human disturbance has left the once rich soil exhausted. This disparity is due in large part to the high emphasis in Asia on increasing organic matter in the soil through utilizing absolutely all available sources of organic matter and using lots of manure (both animal and human).
On our farm we produce quite a bit of manure from our animals, which we compost and spread in the garden after one year. All of our garden debris (stalks, vines, vegetable scraps etc.) is either composted or tilled directly into the garden, or in the case of vegetable scraps, fed to the goats and recycled into the garden through their manure. Leaves from the woods can be used for mulching and composting. We buy old hay from a local farm both for mulching and for animal bedding, which could be seen as bringing in fertility from elsewhere to improve the fertility here. Perhaps there is something to be said for that, but long term I’m aiming to have more of a closed circle of nutrients both generated and utilized on our farm, keeping everything fertile without needing to rob that fertility from another farm.
As well as regularly adding compost and other organic matter, a soil building practice we do a lot of is growing green manure crops to be tilled back into the soil. We try, as much as possible, to avoid having bare ground in the garden. Whenever there is no food crop to be grown, you may as well be using the space for growing organic matter in situ. We grow primarily buckwheat as a green manure in the summer, as well as oats and winter rye in the fall and winter.
I always notice a dramatic increase in earthworms and other soil life after we add any source of organic matter to our formerly depleted soil. Also dramatic is the response of plants to at last have a healthy, living soil to grow in. The areas of our garden that we have focused on enriching produce much hardier, self reliant plants. The scraggly Jerusalem artichokes that we inherited with the farm grew to eight feet last year after having compost spread over them, while the half of their bed that didn’t receive the compost grew to a mere two feet.
When you think about it, soil is one of the most crucial resources that we require to survive. The foot or so of topsoil that covers the world’s agricultural areas is what our species is totally dependent on to produce food. It took thousands of years of natural processes for that vital resource to develop, so it’s of tremendous importance not only to preserve but to enrich what we have left. A mere handful of healthy soil has countless billions of individual micro-organisms, consisting of thousands of species ranging from bacteria to fungi to nematodes. This is why it's important to think of soil as an ecosystem rather than simply as a medium for growing plants. When any ecosystem is healthy all of it’s species have the opportunity to thrive, in this case that includes our garden plants.
This gardening philosophy is a quite a shift from the predominant mindset that got us into so many of the ecological problems we’re dealing with today, the view that we should have total control over the ecosystems in which we live and that all life in the garden other than our cultivated plants are enemies and competition to be destroyed. That’s an outlook on nature that we’re going to have to collectively overcome, for the sake of all life on earth, the sooner the better.
A soil building green manure crop of buckwheat. I scythe it down late in its flowering period to be tilled into the soil.
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