Stacking functions

While permaculture may encompass many different things, what I love about it from a land management perspective, is the intelligent design. It saves effort and resources, if you can align just one element, to do more than one thing! Or to put it another way - stacking functions.

Nothing can demonstrate this better, than a simple Mulberry tree...

Beginning to ripen

This was my breakfast, yesterday morning. I love nothing more than to meander under the mulberry, and pick black fruit, during spring. Those fruit, the birds leave me behind that is! Thankfully, this is a particularly large tree - being the first one we ever planted.

Nonetheless, before the spring rains arrive, causing the leaves to grow and hide all that emerging fruit, the birds always threaten to strip the tree bare. Even before the fruit has a chance to turn black! But somehow this mammoth tree, always manages to offer us (and the birds) a delicious bounty, before all the fruit is gone again.

 At least, 12 metres (40 ft) tall

This tree, is taller than Middle Ridge chicken coop - now my shade house for propagation. If you live in a suburban area, perhaps a tree like this would be better managed (as recommended) by heavy pruning. This encourages more fruiting and allows you to access more of them - rather than the birds.

But this is where stacking functions, and intelligent design enter, for larger acreage. Our problem is too much sun exposure. It dries out the land. So in this instance, I require the tree to reach it's absolute maximum potential. The more it grows, the more it shades. With less moisture lost to evaporation, during the hotter times of the year, I'm getting better water efficiency from what does fall from the sky.

March 2015

The mulberry tree was planted in 2010, and by 2015, I was implementing a new swale behind the mulberry. It's another one of those, stacking functions, concepts. For I needed to irrigate the mulberry, as well as prevent soil erosion. The water formerly ran straight down slope, taking soil with it.

The mulberry became a catalyst to observe, how we could alter the design of the slope for a better outcome. Primarily aimed at reducing soil erosion, and improving water efficiency - a swale became the perfect design element, in this instance. Remember, when dealing with a much larger scale, a tree is not JUST a tree, any more. It's never a lone ranger. Rather, it becomes a catalyst of interconnected functions.

My job is to find as many ways as I can, to assist those links to evolve. So the natural sequences can simply do the rest. Intelligent design, allows you to step back for the most part (eventually) with minor tweaks to assist the process along.

 2016 Addition

I'm always looking for ways to improve the design. Most recently I've incorporated vetiver grass on the side of the swale. Not only to help stabilise it, in large water events, but also to grow mulch I can throw into the swale. It will break down and disperse nutrients, while immediately protecting the soil from sun exposure.

Plant: vetiver grass (1) Functions: dynamic accumulator & soil protection (2). Whenever I prune the vetiver grass, it goes straight into the swale. Over time, this will improve the quality of the soil, feeding the mulberry. Over time, this will increase the quantity (and quality) of fruit which grows.

Changing seasons, for the mulberry

This will be a familiar sight to those in the Northern Hemisphere, at present. Fall. We call it Autumn, in Australia. Whenever the weather turns cooler though, leaves start dropping. Which is no different for the mulberry tree, given it's deciduous nature too. It drops a giant nutrient bomb, every year, on the ground - to help feed the soil.

So the mulberry is a dynamic accumulator, as well as a fruit bearing one. A single tree, with so many functions. I will be happy to list them all at the end.

 My hideaway

This is where I access the mulberry, through all those low hanging branches. I'm actually standing in the swale. I could prune those branches back, making it easier to access - but I prefer the benefit of shade, keeping the soil as moist (and as cool) as possible.

In the heat of the day, under the mulberry is the best place to be. Which is why I recently planted one, up near the permanent chicken coop! Once it gets some size to it (a) the shade will keep the chickens cool (b) keep them protected from wedge tail eagles, flying overhead, and (c) bring a network of bugs to the soil, for them to eat, as well as the bounty of fruit that falls.

Down-side of berm

Back at our most mature mulberry, I have plans to utilise the down slope berm, further. Always evolving this particular design. Because there are so many opportunities to stack functions. At the moment, the lantana downhill is benefiting from the mulberry and swale. Lantana is a weed, we're attempting to remove gradually - as we find something to replace it with.

The very edge of the mulberry's treeline, I hope will be perfect for growing goji berries. I germinated some from seed during winter, and proper placement in this evolving design, could see them bearing fruit successfully, as well.

A tree is not just a tree, on the larger scale. It's potential for expansion, and support for transitional periods - such as I've outlined, in the evolution of our mulberry. Intelligent design, can only continue to evolve. Stacking even more functions together, over time.

Yummy!

Remarkably (if that were not ALREADY enough) a tree can also be valuable medicine. Rich in antioxidants, these mulberries help the immune system fight against infection. My little Mister, is home sick today and wanted strawberries for breakfast. They're all but done for the season, but I had a perfectly productive mulberry tree, just outside. Best to beat the birds to it!

To summarise,a mulberry tree has many stacked functions:

• Dynamic accumulator
• Soil stabiliser
• Earthworks enhancer
• Overhead shade
• Air cooler
• Protection for shrubs
• Livestock guardian & fodder producer
• Fruit bearer
• Medicine

This barely scratches the surface. I haven't even mentioned how trees are natures', original climbing trellis for vines, and also acts as a windbreak for my shade house.

Do you think I should attempt to grow a vine on my mulberry? I was contemplating a passionfruit, but knowing how vigorous those are, they'd cover the goji berries in no time. I don't want to make extra work for myself, keeping the passionfruit in check. Plus I like the fact, the leaves drop in winter, and let the light in. So maybe a deciduous vine?

What are your recommendations/experiences, for a suitable vine under a deciduous tree?