zondag 5 februari 2023

Stomach problems in or after India/Nepal? Check for Blastocystis hominis & take kuṭaja against parasites

 Just a little heads up for fellow Asian travel enthusiasts. If you are having some stomach problems when in India or Nepal, or possibly long after you have returned, it is very much possible you have contracted a parasite called blastocystis hominis. Stomach problems can have a wide variety of causes, from a simple unbalance in your constitution (possibly caused by different climate, food and pathogens in Asia than you are used to) till the more serious and more well-known pathogens such as  E. coli or Giardia. But in some individuals (not everyone!) it can be caused by blastocystis hominis. Wikipedia says:

"Although the role of Blastocystis hominis in human disease is often referred to as controversial, a systematic survey of research studies conducted by 11 infectious disease specialists from nine countries, found that over 95% of papers published in the 10 years prior identified it as causing illness in immunocompetent individuals.[7] The paper attributed confusion over pathogenicity to the existence of asymptomatic carriers, a phenomenon the study noted is common to all gastrointestinal protozoa."

Basically, this means that some people have this but it doesn’t bother them, but in some –otherwise healthy- people it can cause problems.

As for myself, I had some stomach problems such as bloating, pain and flatulence, mostly during the night. I did a stool test in Nepal, yet all tests came out negative. I continued to have some symptoms on and off for months. After a long time (too long) I finally decided to do another text in France. This time, the test was much more extensive. The problem is that standard stool tests do not always test for blastocystis hominis and only test for E. coil, Giardia, etc. The test came out positive and in all likelihood I have carried this pathogen around for 1.5 years. 



Alternative solution to antibiotics

The standard treatment for blastocystis hominis is ten days of Metronidazole. However, antibiotics is not so great for your stomach. And after a bit of Googling, it also does not even seem to be 100% effective. In the past, whenever I had stomach problems in Asia, I used to take an Ayurvedic herb called kuṭaja, kurchi or ambikā, in latin referred to as holarrhena antidysenterica (isn't that an amazing name?) There has been plenty scientific research on the efficacy of this herb against amoebias, giardiasis, etc. 

"Singh (1985) reported the clinical efficacy of HA stem bark extract in forty patients of clinical amebiasis and giardiasis. The extract was found to improve 70% of clinical symptoms (symptoms such as loose motions, constipation, flatulence, abdominal cramping, diminished appetite, and mucus in stools related to these infections) when given at 4 g/day per adult in three divided doses for 15 consecutive days."

Some more Googling also suggested the pro-biotic Saccharomyces boulardii. In any case, after taking both of these all my symptoms disappeared within one or two days.

Kuṭaja in India
Kuṭaja in Nepal
In general, I would advise to always have a supply of Kutaja with you when you travel in Asia. As soon as you have any signs of some pathogen such as amoebias, irritable bowel syndrome, etc, immediately take it. In any case, it won’t hurt. If you are in Nepal, it is available under the name Amati. Take according to instructions on package. Or take 1 tablet before each meal (thus 3 times a day) for a week. Symptoms should disappear within one two days. 





DISCLAIMER: I am no doctor and all of this is on your own risk! If you are sick, go and see a doctor!


dinsdag 19 mei 2020

Transforming Kathmandu garden into permaculture food-forest

We have been lucky enough to have a small but good enough piece of garden in our rented house in Bouddhanath, neglected by the other tenants of the house. Slowly the idea to transform it into something nice, and more and more also something useful and edible, emerged. With industrial agriculture destroying the earth, it is hard to think of anything better than growing some food of your own, and so I have written this mainly to share our experience and inspire others. 

Front before and after

Back before and after
The garden has been a testing lab while I started my studies in permaculture. Starting with Toby Hemenway's Gaia's Garden and Geoff Lawton's inspiring videos, I continued with other books such as Mark Shepard's Restoration Agriculture and a Permaculture Design Course on video. Himgiri, and in particular their teacher Govinda Sharma at Organic Hasera farm, have been a particular inspiration and source of expertise for permaculture in Nepal.   

In permaculture terms, we naturally had to deal with some design problems in our garden common to most expats in Nepal:
- how can the garden withstand neglect for many months in the summer when we are not there?
- when we leave Nepal, what will become of it without anybody maintaining it?
These questions will be answered in the course of this blog post.

In our garden there are two pieces of land, the front and sunny side, and the shady backyard. The front was overgrown with weeds and the backside was barren -even the weeds didn't grow- dried up clay, like rocks, and with a few poorly performing trees. We didn't have the courage to remove all the trees at once, but once our own trees started growing more we removed them. 

Front garden that we started with (after we made a small path).
We left the hedges in but later on removed them one by one once other plants took their place.

Transforming the backside: ploughing, adding woodchips and cow manure
First the soil had to be fixed by adding as much organic material as possible and also seeding some cover crops. It was winter time and so, in true Nepali fashion, we sowed mustard seeds.

Mustard seeds sprouting well: within 2 months the garden had a carpet of yellow flowers.
Also the balcony was soon transformed into a nursery and veggie bed. Lessons learned: spinach and chard wither fast in the hot Nepali spring. Basil did very well though and even survived the winter.
 







The backyard

In the shady backyard there was some existing vegetation such as a few bamboo bushes and some conifers. Our friends from Himgiri Organic store were so kind to drop by one day and give some excellent permaculture advice: get rid of the bamboo and also place the compost in the middle of the garden. The bamboo is a strong plant that sucks up water and nutrients to the disadvantage of other more productive crops. One lesson learned: digging up a square meter of bamboo roots is more difficult than you might think! We did leave some bamboo all the way in the back in a spot separated from the main garden. It thrives in full shade and is useful for producing organic matter for the garden, it looks nice and also certainly contributes positively to the oxygen levels of our polluted valley.

The compost in the middle of the garden has proven to be a great success: the nutrients leak out and benefit the garden and the compost box teems with life of all sorts. Tip: if possible inoculate your compost with worms and bacteria from an existing compost of a friend. Despite all the many so called rules of what you can and cannot throw in the compost, my advise is that as long as something is organic there is no need to worry too much. Especially in such a hot and wet climate as sub-tropical Nepal: after one monsoon whole cardboard sheet mulches just disappear into thin air. Two minor notes: a few citrus peels is fine but maybe don't throw i Hun a whole bag, and also don't throw in kilos of cooked rice/wheat etc. It just doesn't break down well.

Compost hidden behind beautiful arum-lily thriving in the shade and next to the compost

Worms proliferate in the compost, turning kitchen waste into beautiful black soil
We tried growing some vegetables but without much success. The beans fair quite well, you can basically throw them in the garden and they grow without much help. Brassicaceae such as cabbage and broccoli were eaten completely by pieridae caterpillars.

Ravaged cabbages

Planting fruit trees is a much more 'fruitful' enterprise, in many ways. If you pick the right trees and put them in the right spot, after a year or so they take care of themselves. They are also much more sturdy of course then anything annual.

In the shady backyard we planted rose apple (jammu - yes, in Buddhist cosmology our world system is named after this famed tree: Jambudvīpa or the Rose Apple continent) and loquat. Both are traditionally grown in Asia. We were told that in past times many people in Kathmandu had a rose apple tree in their garden, but these days you don't see them very often any more. Unfortunately the rose apple and loquat do not get a lot of sun and so it remains to be seen whether they will fruit properly or not.

Rose apple tree

Loquat

We also planted black and green cardamom (elaichi). It's too cold for green cardamom to fruit in Kathmandu, so I can't recommend it, but the black cardamom is a very good plant for in the shade and it already flowered after 1 year (it might take 2 years or more).

Flowering cardamom
Another good plant for a shady area is coffee. They are self-pollinating but some says it's better to have at least two. Also an excellent shady plant is curry. We planted one in shade and one in the full sun. The one in the sun nearly died and only perked up after being moved to the shade. Initially they grow slowly and will only yield a few lousy leaves, but given the time they grow into nice bushes, and who doesn't want fresh curry leaves?

Avocado also does well in the shade, although it might grow faster in the sun. It grows big so fast that after a few years it will probably reach your rooftop where it will get plenty of sun. If you plant an avocado, be aware you should always place it on the north side of your garden, since it grows into a massive tree that will otherwise shade out your garden. Also place it such that it doesn't shade out your neighbours completely.

Also a chiuri tree (the famous chiuri honey comes from the flowers of this tree) was planted. It grows very slowly the first few years (like two hardy leaves per year), but is said to really take of after a 2 or 3 years.
A tiny chiuri which hopefully one day will grow to be a massive tree
For its beautiful flowers with lovely smell we also planted a jasmine vine.

The front garden

In the front garden the only productive plant that was already there was a Chayote vine (iskush). It grows very vigorously and produces tasty fruits at the end of autumn, and then dies back during the winter.
Chayote squash
We started with planting a few rosemary plants. They have grown very fast and did very well, until the last monsoon when it just didn't stop raining and two out of three plants drowned. Luckily one survived though and we've placed many cuttings of it on higher and dryer places.

Substantial rosemary harvest after only 1 year
Another plant that thrives is the passion flower. Within a year it grew from a tiny plant all the way up the balcony, about 3 or 4 meters high.

Passion fruit in flower. They give nice but slightly sour fruits.
One of our favourite trees is the mulberry (morus alba). Some of you might have noticed there is a large mulberry tree in the old RYI restaurant. Mulberries are related to figs and, like figs, very tough. It grows well and is fruiting already.

We also planted sweet mandarin (suntala) and kumquat (muntala). They perform excellent in the valley. As with many trees, it might take a year or so before they catch on. The first year bugs ate many of their leaves, they didn't flower or fruit, and we thought we'd lost them. But the second year they come up nicely and are full of flowers, and surely soon also fruit.

Kumquat fruit

One of our citrus trees flowering in spring
Another Mediterranean that does well is the pomegranate (anaar). It's a medium sized bush and fits nicely in smaller gardens.

Little pomegranates appearing after flowering
What didn't work well up to now were the grapes. We had two but both of them where placed on low and wet locations, which killed one of them. We placed a new grape on a sunnier and higher location. Grapes do well in India so it should be possible to grow good vines; we shall wait and see.

For someone from the temperate climate, bananas in your garden is an obvious dream to be fulfilled. Not so easy to get your hands on, but we found a regular one and a dwarf banana. They thrive in the monsoon, and hopefully fruit within two years from planting. They like it moist and with as much nutrients and organic matter as possible, so somewhere near a composting place is excellent.

Banana thriving in the rainy season

Finally we also managed to squeeze in a tomato tree (Tamarillo). They love moist and they grow fast. A must have in a traditional Nepali garden.

Other plants and flowers
The trees are the largest elements in your design and also usually take longest to mature, so it essential to think of trees first. After that, you can start planning smaller plants and flowers to fill up the spaces in between your trees.

We had planted a cape gooseberry (physalis) in a shady area to which it was not suited and it died soon. Later we bought a new one and planted it in full sun, which it loved and it started producing fruit immediately.

Not many vegetables can grow in the shade, but taro root does well.  
Taro root under the trees
By far my favourite perennial vegetable must be the pepino melon. It's a nighshade and grows abundantly, in full sun but flowers even in the shade. It gives delicious vegetables look like a small eggplant but than better. They are very easy to propagate from cuttings.
Pepino Melons
Large leaved mustard can give a decent harvest

Flowering blackberry. They start fruiting around April.
There are many (sub-) tropical flowers that thrive even without any direct sunlight. We prefer perennials since they're less of a hassle than annuals. Ask your nursery.

  Amaryllis
Possibly a lily. In any case, an exquisite flower which unfortunately only lasts for a day or so.
Pumpkin gone wild; they go everywhere.

Fauna in the garden
Once the garden starts to come alive again, animals of all kinds of sizes are sure to come and feast. Be sure to make some bird houses and insect hotels. A small pond is also perfect for wildlife, but it needs to be large enough to be able to support fish who will take care of the mosquito larvae.



Occupied insect hotel


Anyone can make a bird house

Bird house
In true permaculture fashion nothing is left unused:
free manured mulch for the garden after the birds have left
Less wanted insects also to enjoy the bounty. Aphids are a common problem in Nepal
Don't worry, just let them be. Some plants may die, but at some point, their natural predators will also arrive.  
Lessons learned

One important lessen we learned is that the soil is really more important than the plants in the initial stages. As beginners we tend to be more interested in the plants than the soil, but giving a lot of attention to the soil in the initial stages of restoring a peace of land will give you quick results. We had initially added some organic matter to the garden, but not enough: the more the better, really think in terms of 20 cm mulch, not just a few leaves! Try to be creative in getting organic matter. A huge bodhi tree (ficus religiosa) that grows around the corner turned out to be a perfect source for litter. The Nepali neighbours even sweep it all together for us. Just get it before they burn it!

Another great source of fertiliser are the numerous chicken farms in the Kathmandu valley. Be careful though, chicken manure is very high in nitrogen and should not be used directly on your garden. Mix it 50-50 with 'brown' organic matter high in carbon such as leave litter and leave it for a year or so. It will turn into perfect compost.
Banana tree and black berries next to the second compost with chicken manure,
and potatoes growing right in the middle of it!




















When starting a food forest, especially on degraded land, the proper way to go about is to start with pioneering trees. In the sub-tropics nitrogen fixing legumes are the obvious choice. Geoff Lawton's favourite is River tamarind (Leucaena leucocephala), but others such as any of the many acacia's will also do fine. Let them grow until 1-3 meters and then keep coppicing them, chop-and-drop, leaving the organic matter to fertilise your main crop. 

Sprouting Leucaena leucocephala
Any beans are also excellent nitrogen fixers, plus you get some beans as well. Try cow peas, french beans or peas. Just buy a bag and throw it in the garden before the monsoon.

You can see the nitrogen fixing modules on a bean


Quick fertiliser: put cow dung in a bucket with water and leave it for two weeks,
then water the plants with the water.
Nurseries in Bouddha and Kathmandu surroundings
As for nurseries, I find the Pulbari nursery too expensive. Better go to the nurseries somewhere outside Bouddha. For example there is one across the Jorpati Nabil bank. The most interesting, cheapest and best nursery by far is the Durga Cottage Gardening Institute (check facebook) found here, who especially has a lot of herbs. (difficult if not impossible to find though, better call him on 9841564952)

Some fruit and nut trees are fine to buy at the local nurseries, such as mandarin (suntala) and kumquat (muntala). For others such as almond, macadamia, peach, and so on, you will be much better of to buy a properly grafted tree either from Charlie Baba (search for 5 Elements Organic Bastion on Facebook - or else he can be found at the Le Sherpa farmers market on Saturdays) or Everything Organic Nursery (their website)You pay a bit more for their trees (usually around a 1000 rupees) but it's money well invested and it will pay off manifold. If you end of going to Everything Organic,  Govinda Sharma's Organic Hasera farm is just next door, so don't miss it!

Another excellent resource is the blog Taste of Nepal with their 'Lists of most common fruits of Nepal' where you can easily find Nepali names of fruits trees, vegetables and also fine recipes.

To conclude, a mini permaculture food forest is a great addition to the biodiversity in a city and also reaps some nice fruits once in a while. Trees do need some care in the first 1 or 2 years, but after that, nature will take care. Leave them for a year and they will only grow larger and stronger. Of course for those who rent a place and at some point have to leave again, you might wonder if it's no wasted effort. Try to talk to the landowner and show the benefits of what you are doing. They might get inspired. Also, once the trees are established, who would cut down such a valuable thing?


donderdag 2 april 2020

Miraculous Abundace at the Bec Hellouin Farm

A recommendation for the book Miraculous Abundance about the Bec Hellouin farm in France.
I am sure some of you might have heard of the farm, perhaps through the English translation of their scientific article that proves it is economically feasible to work the way they do without big machinery. See the Permaculture Research Institute: Diversified Organic Market Gardening and Arboriculture .
They are surely one of the best examples of a temperate climate permaculture farm. What is especially interesting is how they integrated bio-intensive methods and other things into permaculture design.


In the book Charles Hervé-Gruyer describes his journey of his live and how he and his wife Perrine started the Ferme de Bec Hellouin, with all the trials and tribulations, and successes, that arose in the process. They describe all the various agricultural systems they tried and tested such as permaculture, bio-intensive, bio-dynamic, Fukuoka’s and Holzer’s natural farming, etc. It is a good introduction to all of these, yet refrains from too much technical descriptions of the actual know how. They say they planned another book that will describe the Bec Hellouin method in detail, which has now already been published in French 'Living with the Earth / Vivre avec la Terra'. You can order the book at Chelsea Green Publishers. I collected some good quotes from the book. * We then reflected deeply on how to synthesize the many “good practices” gleaned along the way in a permacultural framework. This led to the Bec Hellouin farm method, which highlights the elements we see as essential to building an economically viable agriculture and permaculture likely to contribute to the regeneration of the environment. This twenty-point method continues to evolve. We personally have not invented anything; our only merit is to have foraged from various sources, then tested and consistently organized multiple approaches. Permaculture is a formidable tool for this. * Permaculture has everything to gain by enlisting the approaches of Jeavons, and vice versa. In my humble opinion, the GROW BIOINTENSIVE method can be enriched by permaculture concepts. Some important points—the overall design of the garden, microclimates, the role of trees and water, the benefits of a permanent mulch, and more—are touched on either briefly or not at all by Jeavons. Perrine and I tried to incorporate the wonderful techniques of biointensive microagriculture in the broader context that permaculture offers, and the results have proven very satisfactory. * Likewise, we lay straw or mulch around our crops, as did market gardeners in the nineteenth century. Cutting nettles, picking ferns or reeds, collecting leaves to arrange them between plants is a very time-consuming task. But it is beneficial on many levels, because mulching serves different functions. It protects the soil from direct sunlight, controls weeds, limits the evaporation of water, and fertilizes the soil as it decomposes. If we were to add up the working time saved, from beginning to end, through mulching, weeding, watering, and compost production (which is no longer needed on these plots), we would likely arrive at a total greater than the time it took to mulch. And we have the satisfaction of seeing that, through mulching, our soil becomes more fertile and alive over the years. * Perrine and I are convinced that the most innovative system we put in place in our valley is the forest garden. * A growing number of experts are sounding the alarm bell. If there were a sudden shortage of oil—linked, for example, to a geopolitical event—France would have only a few days of food reserves and could quickly sink into crisis. This may seem surprising to many readers. But yes, the spectre of famine could recur in our developed countries. These nations are far more vulnerable today than before due to the rise of industrial and globalized agriculture, a colossus with feet of clay. That agriculture is based on a highly capital-intensive and centralized model: 80 percent of arable land on the planet used in intensive mechanized agriculture is owned by multi-national corporations. * These are strong reasons to reconsider the power of illusion engendered by the steel monsters that roam our desertified countryside. They are, in the image of the system that produced them, predators. * It is today that we must actively enter a transitional phase; 2030 will be too late! · Traditional agriculture was labor intensive, industrial agriculture is energy intensive, and permaculture-designed systems are information and design intensive. —David Holmgren * In southern France, in the village of Cucugnan, Roland Feuillas makes a “health bread” from ancient grains ground in a stone mill. He has conducted extensive research to find ancient grains with outstanding organoleptic qualities, including local varieties that had disappeared, which he plucked from old thatched roofs. Feuillas cultivates his own no-till grain under layers of mulch. Customers flock to his exceptional breads. * We are convinced that an agricultural transition will not happen without a gradual evolution of the way we feed ourselves. Holding on to our very poor diet stands in the way of the many possible changes in agriculture. Again, it is up to each of us to change our practices, responsibly. Buying industrial food products perpetuates the industrial model. Choosing organic, local, fresh, seasonal products stimulates small-scale family agriculture, accelerating a necessary and enjoyable transition with many benefits at all levels, starting with our taste buds. This healthy and delicious revolution depends on education and awareness; and this, frankly, is a big job. But the movement has begun and like Pupoli with his canoe, each of us must find our favorable vein in its current. * The volumes demanded by a single restaurant are significant and can provide a solid foundation for a market gardener, provided that the relationship is fortified with a contract, as few restaurateurs are truly ready to take into account the constraints of their partnership as Antonin does. This type of partnership is actually not that easy to implement. The chefs have to change their work habits, accept seasonality. The size of the produce is not always uniform. Weather conditions can cause setbacks. But they are rewarded with incomparable freshness and flavor. * Give an individual guaranteed possession of a barren rock, he will transform it into a garden; give him a garden with a nine-year lease, he will turn it into a desert. * The emphasis given to nuts will allow us to combine grain flours with nut flours to make bread, again reducing grain needs. (Nut flour cannot be used alone for bread making.) Increasing use of chestnut flour will be beneficial to human health because of its nutritional power. * The cost of creating a microfarm (from 50,000 to 100,000 euros/$56,500–113,000) / We have estimated the average start-up cost for the creation of a vegetable microfarm to be in the range of 75,000 euros ($84,750).You can start with much less: A small garden and raised beds can be created at a very low cost. The budget of the installation, however, should also include enough to live on for the first few years, until the business takes off. * We strongly advise you to quantify the production of your garden, its economic value, even if only virtual, the time it will take to produce it, the costs to be incurred. For a market garden, when you reach 25 euros ($28) of vegetables per square meter per year, on average, and when each hour of work will generate at least 15 euros ($17) in sales (for all tasks, including maintenance, marketing, management), you can estimate that you have some chance of earning a living (modestly) in the vegetable business * Train yourself as much as possible before you start, rather than after. Our friend Jean-Martin Fortier believes it takes ten thousand hours of work to become a market farmer and this number jives with our experience: This is the fifth year that we have begun to feel at ease confronting the complexity and diversity of tasks. Time invested in training is time gained and money saved. Remember: Permaculture farming is agricultural knowledge. You will not need sophisticated and expensive tools; it is in yourself you should invest!

zaterdag 26 oktober 2019

Environmental issues and Permaculture at a Buddhist Monastery

On the invitation of the Rangjung Yeshe student society at Kanying Shedrub Ling, Govinda Sharma gave a an introduction to permaculture at Utpala cafe in Bouddha, Kathmandu.

At the time of the Buddha, monks have famously gone for alms begging in the surrounding villages. There are also instructions found in the Buddhist texts that monasteries should not be build too close to settlements, nor too far away. This rule was obviously purely made for that time's context, where monks and nuns had to walk from the monastery to the village and back each day for alms. When Buddhism moved to other countries, for example China, the situation changed however, and monastics in some monasteries in China had to grow their own food, since going for alms was socially not so much appreciated as compared to the situation in India. In Tibet, at first during the time of the Tibetan empire, the king assigned seven families to take care of each monastic. After the collapse of the empire, in later ages and in some cases up to the present day, monasteries own huge swats of land which are then worked by lay people, very much like the feudal system in Europe, or lamas go out on tours through their area to collect food and funds.

But now we have entered the 21st century, Buddhism has spread around the globe and the situation has changed again. Buddhist communities such as Lerab Ling or Gomde Pyrenees are slowly growing and are becoming large centres. How should such communities be fed? Also, given the current environmental crisis, what is going to be an ethical way (perhaps we can say in accord with the Dharmic principle of not harming) to feed such communities? What is the Buddhist ethics of the 21st century? If we buy all our food from the global market, what environmental impact does that have?

Now of course there are many environmental problems and hopefully also many solutions. As Buddhist, there is no reason to be philosophically invested in one particular solution. To deal with some modern day problems, we might occasionally need modern day solutions. One of them is permaculture. Permaculture can be defined as a "set of design principles centered on whole systems thinking, simulating, or directly utilizing the patterns and resilient features observed in natural ecosystems. It uses these principles in a growing number of fields from regenerative agriculture, rewilding, and community resilience."


Govinda Sharma is one of the top permaculture teachers in Nepal, has over three decades of teaching experience, and also has a degree in organic agriculture from the renowned agricultural university of Wageningen in the Netherlands.

Govinda Sharma

Before starting the lecture Govinda was shown around the Saturday farmers market at Utpala cafe, which is becoming increasingly popular.

Govinda at Himgiri organic hub stand

Govinda talking with leading figures of the monastery Buchung and Shedrub Gyatso

Govinda was also given a tour through the monastery. The monastery is currently exploring the possibility of starting the production of ornamental flowers and food according to permaculture design at a barren plot of land.

Shedrub Gyatso showing the nursery


Inspecting the composting 

This little monk was trilled when a walnut fell out of the tree right in front of him


Then the lecture commenced. The first part of the lecture looked at the question 'why is permaculture needed'? This consisted mostly of looking at a wide variety of ecological problems such as deforestation, massive use of pesticides, eutrophication through an excess of nitrogen, increase of floods and droughts, global warming and so on.

 Eutrophication causes algae to bloom and suffocates all live in aquatic bodies  

In the second part of the lecture Govinda looked more at what permaculture can offer in terms of solutions to these problems. He mainly emphasised that even small things which we can apply immediately in our lives such as refusing plastic bags is also permaculture

A full room at Utpala

The last part of the talk consisted of some practical tips in the field. We looked at soil, sun, water, wind direction and much more. 

In the fields

You can listen to the talk here.