glass gem corn

2012/05/18 deej 0

The internet – or at least the organic / heirloom gardening, plant-nerd and permaculturish back alleys of it that I frequent – have been buzzing for the last week or so about a newly discovered variety of corn.

It’s called glass gem corn, although it could as easily be called rainbow corn or even omgponies corn. Whatever the name, it’s beautiful.

Glass gem is a flint corn variety, also sometimes called Indian corn (as opposed to dent, or field corn, sweetcorn, and popcorn) which means that it’s used for grinding into cornmeal or cornflour rather than as a fresh vegetable. It might work as popcorn, although it’s not specifically a popping variety. You could probably pick it when it’s still young, and roast it; most grinding corn can be used for roasting as well if you pick it at the right stage of development.

I really, really want to try growing some. Until this week I’d never considered growing a flint or dent corn variety and grinding my own cornmeal, but I’m now fired up to try it. I love tortillas and corn chips, and I’m quite happy to experiment with adding corn to stews and soups the way I’d normally add pearl barley or lentils. I’ve never had grits, but they sound a lot like the South African mealiemeal porridge that my dad used to love, or polenta. Entirely edible.

The only downside is that importing new corn varieties into Australia is quite tricky. Import permits, quarantine inspections, limits on how many seeds can be imported, and then organising those seeds to be grown at a quarantine facility in Australia before quarantine release the resulting plants. I’m not clear on if they even do release the plants, or if they release the seeds of those plants after growing them on for their entire life cycle in a quarantine facility. I’m going to see if I can convince one of the heirloom vegetable seed companies to import some seeds (to grow for more seed, which they can sell next season). Failing that, I’ll have to import some myself.

More Info:

Images via Seeds Trust

Boabs and Baobabs

2012/05/16 deej 0

Most people have barely heard of baobabs, or boabs as they’re more commonly called in Australia. It’s odd, since we’re one of the few places in the world which has a native baobab species – the Australian Boab, Adansonia gregorii.

There are only eight species of baobab. Of the other seven, one is native to Africa (Adansonia digitata, the African Baobab), and the other six (Adansonia grandidieri, Adansonia madagascariensis, Adansonia perrieri, Adansonia rubrostipa, Adansonia suarezensis, and Adansonia za) are endemic to Madagascar.

All baobabs are extremely drought tolerant and hardy. Some are as little as 3m tall, while others are up to 30m in height, but all have massive trunks which can reach 15m in diameter. The massive trunk may be cylindrical, bottle shaped, tapering, or irregular; thick tapering branches resembling a root-system extend from the trunk, which is why baobabs have often been referred to as upside-down trees. The wood is fibrous and soft, under a thick layer of bark, and stores water for dry periods.

The wood can be chewed to provide moisture and relieve thirst; humans as well as certain animals eat it in times of drought. The roots can be tapped for water. The trunk of the tree often develops a hollow, which fills with water during the rainy season and acts as a reservoire during the dry season. Water inside the trunk of a baobab remains potable for months, apparently due to natural preservatives leached by the living wood that keep water from fouling. This may be an adaptation to prevent microbes breeding in the water and infecting the tree, which may have water in the trunk for several months or even years at a time.

Baobabs are semi-deciduous, and may lose their leaves and become dormant for several months of the year. This period depends on the environmental conditions in the area. Under good conditions, growth can be quite rapid, up to 2m in 2 years. Trees will begin producing flowers and fruit after 8 – 25 years, and some species may live for up to 1000 years.

Flowers are large, showy, and highly scented. Although pollinated by fruit bats, the flowers are also a favorite nectar source for bees. The fruit consists of a hard, woody outer shell surrounding an arrangement of segments similar to those of a citrus fruit, with angular pockets of soft pulp surrounding a cluster of hard, black, kidney-shaped seeds. The pulp may be white, yellowish or pinkish in color, and is dry when ripe. It is rich in vitamin C, provitamin A, B complex vitamins (B1, B2, B6), calcium, phosphorus, and iron, and is described as having an acid gingerbread flavour. It forms a mealy solid, but a few hours in the sun dries it into an off-white powder. It can also be beaten into thin, leathery pancakes which can be stored for an extended period. This powdery substance is soaked in water to provide a refreshing drink somewhat reminiscent of lemonade, which is also used to treat fevers and other complaints. The seeds are also reported to be edible.

Each matured plant may produce 30 kg or more of fruit per year. Harvest the fruit when it falls to the ground, or pick ripe fruit if it can be reached. The fruits themselves are unusual in that they remain dangling during the dry season long after the tree sheds its leaves. They are also unusual in remaining edible far past the point where other fruits would have decayed into putrefaction. Stored under normal ambient conditions, they keep for up to 3 months.

Seeds can be collected from picked or fallen fruit. After crushing the hard woody shell of the fruit, the seeds can be extracted from the dry acidic pulp. Baobab seeds have very hard seed coats and germination is usually less than 20%. In nature, dormancy is broken by passage through the digestive system of large mammals. In cultivation, dormancy may be broken by immersing the seed in hot water for five minutes, by manually scarifying the seed coat, or by acid scarification for 6 – 12 hours. Unless pretreated, seeds can take a year to germinate. Seedlings have big, flat and paired cotyledons, and the first leaves are generally narrow, simple and linear. Effective protection against livestock is essential after planting the seedlings.

The leaves (of at least the African Baobab) may be eaten as a green vegetable, sometimes steamed and eaten as a side-dish like spinach, but most often ground up in soups, stews, sauces, relishes, and condiments. They contain high levels of provitamin A. The leaves may be dried, and keep well in this form, without losing their glutinous polysaccharides. To maintain a high level of provitamin A level in dried leaves, it is important not to dry the leaves in the sun. The sprout of a young tree can be eaten like asparagus, and the tap root of very young trees is also edible.

 

What baobabs need:

    • Water – anywhere from 200 to 1200mm of rain or irrigation per year. Baobabs are very tolerant, and can survive both arid and subtropical climates.

 

    • Sunlight – Lots of it. Baobabs naturally grow as solitary trees, or as top level canopy trees..

 

    • Soil They will grow on many different soils, but deep, calcerous soils are best. Baobabs reportedly tolerate laterite as well as relatively alkaline (e.g. limestone) soils.

 

  • Space – Baobabs are large trees, up to 30m tall and 10 – 15m in trunk diameter. They grow slowly, but wherever you plant a baobab you must plan for it to expend over its lifetime.

 

What baobabs have to offer:

    • Edible leaves and fruit.

 

    • Water storage in trunk hollows, and an emergency water supply in the wood itself.

 

  • Seeds, which can be grown into more baobab trees, either to plant out or for their edible tap roots.

 

What baobabs do not like:

  • Soggy or waterlogged soils, or even seasonal inundation.

 

  • Heavy clay soils.

 

  • Frost (especially when young).

 

 

Images sourced from Wikimedia Commons:
File:Baobab_Frucht.jpg
File:Baobab_02.jpg
File:Adansonia_digitata_%282%29.jpg
File:BoabPrisonTree.jpg
File:A_fruit_of_a_tree_in_central_Boa_Vista,_2010_12.JPG
File:Adansonia_grandidieri01.jpg
File:SavanurBaobab06052007318.jpg

Trees and Water

2012/05/15 deej 2

No scheme water, and no bore or rainwater tanks in place, made irrigation over the summer a very labour intensive task. So every weekend we filled up a couple’ve barrels with water and drove them up to Gallifrey, then manually transferred the water to the water tubes around each of the trees using watering cans.

We tried a few water containers, and experiment showed that the recycled plastic olive barrels fitted with taps were the best. The flexible plastic water bladders that we tried first didn’t hold much water, and sprung leaks after two or three uses. The plastic slimline rainwater tank from Bunnings was better, but the lid didn’t seal, and the tap attachment wouldn’t take a regular hose, meaning that we had to siphon water out from the top. Slow.

It could have been worse; our neighbour thought we were manually watering each of the tree seedlings every weekend. The water tube tree guards were a life saver; they’re UV resistant plastic tree guards with a built-in 20L water bladder and a dripper in the base. The water drips out slowly over (in theory) 2 weeks. In hot weather the water in the water tube expands, forcing the drip rate to increase, while in cooler weather and at night when the plant requires less water the drip rate decreases.

So far, we have four fig trees (Ficus carica), all different varieties, two pomegranates (Punica granatum), a natal plum (Carissa macrocarpa), an acerola cherry (Malpighia glabra), two honey locusts (Gleditsia triacanthos), a baby boab (Adansonia gregorii), three kei apples (Dovyalis caffra), and four moringas (Moringa oleifera) planted. Those are the food trees. Yes, boabs count as food trees. There are also two oak trees (Quercus spp., acorns collected from Stirling Gardens in Perth), a dieback resistant jarrah seedling (Eucalyptus marginata) that a friend gave us, a few dozen wattles, mainly Acacia victoria, but also some Acacia acuminata and Acacia pycnantha, a few pink siris (Albizia julibrissin), and one or two black locust trees (Robinia pseudoacacia).


The plan is to plant a shelter belt around the entire perimeter, inside the mandatory firebreak, consisting of thorny natal plum, kei apple, boysenberry (Rubus x boysenberry) and sea buckthorn (Hippophae rhamnoides), as well as fire retardant trees like oaks, maples, sweetgum, hazel and prickly pear. Eventually, it will be a noise buffering fire barrier in the form of a hedgerow. Inside that will be a secondary firebreak, planted with grain and meadow plants in winter, and space loving succulents and vegetables like squash in the summer. Inside that will be the forest, and the house.

“The Machine” – An instructional

2012/05/09 kai 0

It’s only been 2 days since we set up this blog, and already D has gone crazy with the writings below. I figured it was probably about time I contributed somewhat to the effort and I thought the best place I could add value was in giving a bit of a breakdown on how we made the seedball machine and the costs/effort involved.

We’d first seen a seedball making machine on youtube in a video which, sadly, I’ve not been able to find again. There are quite a few other videos out there but it was really the only one that showed how it had been made from start to finish, including the seedball scoop. I really liked the idea of a machine (especially after making 600 of the buggers by hand) and it seemed like a fun construction project.

D seemed pretty keen on making a bicycle powered one after seeing the milkwood video and I also liked the idea of it being independent of power. Not to mention that anything that allows me to avoid mains power is probably a good thing.

My first sketch of the machine (to the right) was pretty much from memory of the original video we saw. It consisted of basically;

  • A table on which small wheels were mounted upwards
  • A large barrel with two open ends, mounted on the wheels to turn
  • A belt going down to a roller below the table
  • A second belt going to the power source of the machine, in this case a (badly drawn) bicycle, but a motor in the original. (We had an old dead bicycle carcass (2 flat tires and a bent rim) given to us for free. Check your local areas for bike exchanges or friends wanting to get rid of old bikes. It’s usually easy to find something useable.)

 

My thought was that the bicycle could easily be swapped out with a motor at a later date if we felt we wanted to do that. The core of the machine is an old olive barrel. It’s perfect in that it’s robust, large and already has a curving lip at the top and the bottom should you choose to cut these off. Ensuring that your mixture stays in the barrel with minimal fuss. It’s a 190 litre barrel and cost us $20 from a local person selling them off.

The original design called for a frame of wood, kind of like a table with a opening in the top and a solid floor below the feet with a axle mounted on it. However while talking with D’s step-dad T, he mentioned that he had an old broken Bunnings saw-horse, cutting table…thing in the garage that might suit. It was perfect! It even folded down! I turned it upside down and removed the broken wooden support surface. I then screwed 2 lengths of wood longwise across the two legs.  This was all flipped over and used as the base for the barrel.

To this I added 4 x trolly wheels purchased at Bunnings. These were a little tricky to find in the maze of Bunnings and come in a variety of sizes, I ended up choosing 4 with a diameter of about 8-10 centimeters. This seemed large enough to give the barrel enough clearance to turn while still maintaining a good surface area contact. These were the most expensive part of the final design at $19 each, but you could probably use any second hand trolly wheels you can get your hands on.

Do make sure to place your wheels and check that your barrel clears the wooden rails before attaching them, or there shall be embarrassment later. Also make sure that your wheels are aligned both side to side and longways or your barrel will sit crookedly and bounce/jostle while it turns. Here is a shot of what your creation should look like if all goes well.The barrel will turn easily and smoothly at this point with no jumping or sticking.

Now to power it! My original design called for an axle under the barrel that took a belt from axle to barrel, then a second belt from axle to power source to turn it. Once again T came to the rescue of my overcomplicated design and asked why we couldn’t just run a belt directly from the barrel to the wheel, given there was now a nice gap in the front of the “device” table. I agreed that this was a fine plan and we ran a test string from the bike directly to the barrel to see if it worked. In the picture to the right you can see the original thought for the axle (a PVC pipe with a looser PVC pipe over it) still in place. This was later removed.

In order to run the string/belt we removed the rear tire of the bike so the string could fit in the groove where the tire normally goes. This worked well and seems to be impossible to get to “jump” out through abuse.

In order to hold the bike in place we created a fairly simple rear wheel “hold-up-a-thinger” out of some scrap wood, nails and two D-nuts. A base line of wood (here a board that we had spare, but any flat piece should work) with two uprights measured for placement and angle to be just outside the rear horizontal swingarm of the bike. Sadly I have no close ups of this available but might add this later.

We then used two angled D bolts to go around the swingarm and through (outwards) the two uprights. Securing these in place with washers and nuts. Make sure your uprights are tall enough to hold the wheel a good 6-10 CM clear of the base board when bolted on. Next we used our test bit of string from the wheel to the barrel to give it a go: SUCCESS!

The string actually worked surprisingly well. It was a slightly stretchy string, almost elastic, and very cheap from Bunnings. ($8 for 10 meters). It worked so well in fact that I, with much sadness, pushed aside the (rather expensive) rubber belt I had bought and decided to just stick with the string as the belt was quite wide and did not sit well in the bicycles wheel groove.

After this there was just the business of getting the bike level and comfy to ride. For this we simply built an upside down “T” shape out of wood that just fit between the front forks of the bike with the wheel off. Next we drilled a hole right through the top of the post at the right height and ran a long bolt through it that would fit into the axle slots on the front fork. Finally we mounted the frot forks on this and added washers and a nut to clamp it down solidly.

Viola! A finished seed ball machine.

I’m looking forward to “giving it a spin” as it were. Total cost breakdown was as follows.

  • Bike: Donated, free
  • Wood: recycled scrap, free
  • Trolly Wheels: Bought at hardware store, 4 x $19
  • Barrel: Bought via local second hand, $20
  • Rope: Bought at local hardware store, $8

Grand total? : $104

And you could easily get that down by using old trolly wheels on the base from somewhere. The only addition I intend on making to the machine so far is to get one of those “no slip” bath mats and wrap it around the barrel to give the rope a slightly better purchase. It works fine as it is but you have to accelerate up at a steady pace. It can sometimes slip if you put too much sudden power into it. I’m also considering a thicker rope, but it depends on how well the current one does.

The only other suggestion I’ve had (which was genius) relates to the fact that I have an old “Magic Pie” Electric bicycle wheel lying around from when I used an electric Bike. A friend pointed out that if I wanted to safely and quickly “be lazy” I could simply pop the rear wheel off the bike and replace it with the Magic Pie electric wheel. It’s a 2kw wheel and runs off a battery pack. It’s PLENTY powerful enough to spin the barrel for hours and even has a “cruise control” button, so we could get it to a speed we like and lock it there. No muss, no fuss! So if we find peddling gets too tiring we can charge the battery up via solar and let the sun do our work for us. 🙂

 

Seed Balls

2012/05/09 deej 6

Seed balls are an ingenious idea, developed and pioneered by Masanobu Fukuoka. Fukuoka was a Japanese farmer and philosopher, and an early proponent of natural farming. He suggested that much of the effort that humans put into agriculture is wasted, and that we should instead be working with the natural environment. Seed balls are one way of doing that.

Fukuoka wrote “If rice is sown in the autumn and left uncovered, the seeds are often eaten by mice and birds, or they sometimes rot on the ground, and so I enclose the rice seeds in little clay pellets before sowing. The seed is spread out on a flat pan or basket is shaken back and forth in a circular motion. Fine powdered clay is dusted over them and a thin mist of water is added from time to time. This forms a tiny pellet about a half-inch in diameter. There is another method for making the pellets. First, the unhulled rice seed is soaked for several hours in water. The seeds are removed and mixed with moist clay by kneading with hands or feet. Then the clay is pushed through a screen of chicken wire to separate it into small clods. The clods should be left to dry for a day or two or until they can be easily rolled between the palms into pellets. Ideally, there is one seed in each pellet. In one day it is possible to make enough pellets to seed several acres. Depending on conditions, I sometimes enclose the seeds of other grains and vegetables in pellets before sowing.” (Masanobu Fukuoka [1978]. The One-Straw Revolution, p.99.)

It’s a very simple idea. Seed balls are simply scattered directly onto the ground, and not planted, which provides a huge reduction in the time and effort to plant any large area. The clay protects the seeds from birds, insects, and harsh weather conditions until enough rain falls to melt the clay and germinate the seeds. The seed ball contains a mixture of different seeds, and their planting is left to the elements and random selection, so that the most appropriate plant in the most appropriate position will emerge, and require the least attention. Seeds can be mixed to form deliberate companion planting guilds, or a variety of seeds can be included to ensure a varied ecosystem results. Many people include chilli powder, mint, or pennyroyal to repel ants from digging the seeds out of the seed balls, and you can also add inoculant for legumes and the spores of mycorrhizal fungi to encourage a healthy soil ecosystem from the start.

We tried an initial round of seed ball making, using 1 part seeds to 3 parts vermicompost, 1 part chilli powder, 5 parts bentonite clay with added minerals, and approximately 2 parts water. Red clay powder is hard to get here, and the only benefit in using red clay over bentonite is the mineral content. Conclusion: hand rolling around 600 seed balls takes a long time, and it gets really easy to roll them too big. It was fun, but I think it would quickly get to be less fun considering that for our 7.5 acres we expect to need something like 300,000 seed balls (at a recommended application rate of ten seed balls per square metre, or more to reclaim derelict land.).

Automation beckoned as a solution. The internet abounds with ideas and designs for machines for making seed balls. The basic premise is a barrel or drum and a mechanism to roll it in place. The dry seed ball mix is introduced into the rolling drum, and water is sprayed onto the dry mix until it begins to nucleate and form small balls. A mesh screen is used to catch seed balls once they reach a certain size and remove them from the drum.

The machine is simple and straightforward, and we would have gone ahead and built one with a motor to roll the barrel, just like all the rest on the internet, except that I saw Milkwood Permaculture’s bicycle powered machine. It’s ingeniously low tech, and can run anywhere without needing a battery or an electricity outlet. As far as I can tell, it’s also the only bicycle powered seed ball machine anywhere (or at least, the only one on the internet). Until now.

One recycled bicycle frame, modified plastic olive barrel (also recycled, and thoroughly cleaned of olive flavoured brine), some wood and stretchy rope later – we have The Machine. It hasn’t yet had its inaugural use, but it spins perfectly. Watch this space for updates.

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