Stacking Functions With Chickens

We have five chickens - Rakhi, Vellam, Burfi, Nongu and Jamun - in a coop next to the house. They are little bundles of joy to have around. Each one of them has a unique personality and it is quite amusing to watch them. I let them out for about an hour everyday and they trim the grass growing around the house. We have our compost pile in the coop and get the chickens to turn the pile every week. We set aside food waste and discards and the proximity of the coop ensures that we take it to the chickens at least once a day.
Here is a video made by Abhi about how these chickens make fine mulch

https://www.youtube.com/watch?v=03ondrGMeD0&t=3s 

My earlier post on stacking functions:
Stacking functions with trenches

-- Hema

Stacking Functions With Trenches

"Stacking Functions" is used in Permaculture to mean that every element in the design performs more than one function. The ideal is to have each element perform as many functions as possible.

One recent example of stacking functions at our farm:

We got some trenches dug for harvesting rain water. Each one was about 30' long, 3' wide and 3' deep. We filled them up with various kinds of bio-mass -- coconut husks, banana trunks, palm shavings, thorny plants, some manure to inoculate the soil with micro-organisms. Adding bio-mass to the trenches increases the absorption of the soil; exposed soil gets parched and can't absorb much rain water.

As we were wondering how we can "stack functions" using these trenches, we discovered three ways of doing so.

1. Growing area for tubers:
Locally grown betel-nut-leaf tuber needs a 3' deep pit, since each one can grow into a whopping 5 kg. Our trenches thus offered the perfect place to grow these tubers. The bio-mass in the trenches were decomposing for three months when we planted the sprouted tubers. They were planted when the monsoon season had just begun, in July. The trenches harvested the monsoon rains, growing these tubers. We had the (aggressive) tuber-vines climb on a make-shift trellis made by erecting huge dead branches. Last week we harvested 12 kg of tubers. It was very gratifying to realize that we never had watered them;  all we did was to plant them at the right time in the right place. This tuber is starchy like any other; it has a more complex flavor than potato. They can be stored up to one year. Local people have taught us a few ways of cooking these. We look forward to growing them again this year.

2. Trellis and Wind Break:
We had put up a make-shift trellis adjoining the rainwater-harvesting-tuber trenches. We wanted to grow some fast-growing trees that would serve this purpose in the years to come and also provide a wind break. We planted Gliricidia sepium to help with both these objectives. The cuttings were thick and fat and at least 4' long. Even though we never watered them, they are thriving beautifully. Thanks to the work done by the trenches. By next season they will be ready to host the betel-nut-tuber vine.

3. Slow-decompostion of thorny trees:
We have a lot of thorny Acacia spp. trees. We started clearing one patch and piled all the thorny branches and trunks into the nearby RWH trench. This mound of thorns piled in the trench is well above ground now. Once the termites take over it will slowly collapse and add fertility to the trench. We will plant trees close to this trench in the next season.

Here I have documented another way of using thorny plants.

- Hema

An Evolving Polyculture

"Burn this ghastly pile of thorny plants". We repeatedly heard this from the local people and farm workers when we had uprooted a lot of thorny shrubs and trees. The pile was about 7' tall and 20' wide. We didn't have the heart to waste that much biomass, much less to produce so much heat and smoke.

"The problem IS the solution" says Bill Mollison, co-founder of Permaculture. With this thought in mind I searched through Mollison's Design Manual. I found the south east Asian design of Palm circles useful and appropriate. Here is how we customized it:

We dug a shallow, circular trench around the thorny pile and mounded the soil (from the trench) on the outer side. We planted 8 coconut saplings around this trench. This formed a circle of 27' diameter. The coconuts were about 10' apart. These were interspersed with banana and papaya. We once grew a small crop of peanuts on the berm. We are now growing pumpkins there.

After three years, this circle and the area around it has become home to all these volunteers:

wild passion flower (creeper covering the thorny pile),

Crotalaria juncea (Indian hemp or sunn hemp),

Clitoria ternatea (creeper with beautiful blue or white flowers),

Crotalaria striata (leguminous shrub with lot of yellow flowers) ,

Calotropis gigantea,

Dodonaea viscosa (shrub),

Holy Basil (Indian Tulsi),

Thai Basil,

Wild Tulsi,

Medicinal herbs,

Rosella (gongura),

Tridax procumbens (ground cover),

lemon grass.

These plants together with the ones we planted (i.e. coconut, banana and papaya) have created a small paradise that attracts a lot of butterflies, birds and bees. The vines keep the thorny pile under a perennial green cover, thus helping with moisture retention and decomposition. Thanks to mainly the indefatigable termites, the colossal thorny pile has shrunk to a mere 2'  mound. A scoop of the soil from underneath the pile now features a beautiful biomass-rich crumb. And all this newly created fertility is slowly oozed out to the plant circle.

A portion of the circle showing Coconut, Bananas and Papaya

The decomposing thorny pile with passion flower smothering it

Aerial view of the circle

According to Bill Mollison, as the coconuts grow the fallen coconut fronds are piled up in the center. This reduces labor when compared to conventional grid-style coconut groves. The pile in the center thus becomes the reservoir of nutrition and moisture. 

The circle is always under mulch with the banana suckers we remove periodically. We once used wasted cardboard to mulch the berm. This brought in a lot of termite activity that enriched the soil.

Initially we flood irrigated the circular trench once in a few days. Now we have laid a drip line. The perennial mulch and drip irrigation put together brings down watering significantly. This circle has gone without water for weeks in a row. The bananas and papayas from this circle are healthy and tasty. We are waiting to see how the coconuts do.