Dans le cadre du Programme NUTRITION de l’UNICEF en Algérie, un projet de construction de jardins familiaux fut lancé dans les camps des réfugiés du Sahara Occidental (Sahraouis). L’objectif principal de ce projet est de produire de la nourriture fraîche (légumes et fruits) pour les réfugiés, en supplément au panier mensuel de l’alimentation offert par l’ONU.
Au moins un ingénieur agronome dans chacun des camps s’occupe du suivi de ce projet. Déjà en 2003, l’ingénieur Taleb BRAHIM a commencé à cultiver des légumes dans son jardin privé au camp de Smara.
Aujourd’hui, il me fait parvenir un petit rapport et quelques photos. Lors de mes visites à Smara en Mai et Décembre 2006, j’ai pris des photos que je joins à son message. La conclusion générale est que des légumes peuvent aisément être cultivés dans cette partie du Sahara (S.W. Algérie), en particulier en utilisant le conditionneur de sol TerraCottem, qui nous laisse épargner beaucoup d’eau et d’engrais.
Within the framework of UNICEF’s nutrition program in Algeria, a project was launched to construct family gardens in the refugee camps of the people of the Western Sahara (Sahraouis). The main objective of this project is to provide fresh food (vegetables and fruits) to the refugees as a supplement to the monthly food basket offered by UNO.
In each of these camps at least one agronomist takes care of the follow-up of this project. Already in 2003, ir. Taleb BRAHIM started growing vegetables in his private garden in the camp of Smara.
Today, he sents me a short report and some pictures. As I visited him in Smara in May and December 2006, I am adding my pictures of his garden to this message. The general conclusion is that vegetables can be grown quite easily in this part of the Sahara (S.W. Algeria), in particular when using the soil conditioner TerraCottem, saving a lot of water and fertilizer.
On November 14th, 2006, I posted on this blog a short message on the success booked with TerraCottem soil conditioner (TC) in Algeria (see “Success with TC in Algeria“).
I told you that Unicef Algeria invited me in 2005 as a scientific consultant to study possible improvement of the living conditions in the refugee camps of the Sahraouis people in Southwestern Algeria (Sahara desert), looking for ways and means to enhance local food production. The main objective was to look for new possibilities to grow vegetables in small family gardens in the refugee camps in the desert, irrigating them with a minimum of brackish water, taken from the subsoil.
A Memorandum of Understanding was signed with the Belgian TC-DIALOGUE Foundation, through which a project was set up to construct a large number of family gardens in different refugee camps. In these gardens, the soil conditioner TerraCottem (TC) is used to limit the consumption of fresh water for irrigation and to limit the application of fertilizers.
Already in 1983-1992, I have developed a soil conditioning method (called “TerraCottem“, see the website with that name ) at the University of Ghent (Belgium). With this granular soil conditioner one is able to stock a lot of water and nutrients in the rooting zone of the soil and to improve the microbiological activities and the formation of a larger root system. The result of all this : a better plant growth with less water and less fertilizer.
In October 2005, a small demonstration test was set up in front of the Sahraouis Ministry of Public Health in Rabouni (Tindouf area, Algeria). One out of 10 already planted seedlings of the Prosopis tree was treated with 30 g of the TerraCottem product. In November 2006, I showed you already a number of pictures showing the effect of TerraCottem (TC) on that seedling.
Today, I am publishing a new series of pictures, showing the remarkable effect of the TerraCottem (TC) soil conditioner on plant growth under dry conditions.
Together with my team of the University of Ghent and in cooperation with the Dutch Committee Maastricht-Niou, I have set up different development projects in Burkina Faso since 1988. Reforestation and creation of community gardens for women have been the main topics (see other postings).
In 1997, we started the application of the soil conditioner TerraCottem (TC), as a project of the Belgian TC-DIALOGUE Foundation (see the website http://www.tcdialogue.be). In the community garden for women of the village of Niou (Kourweogo Province, Burkina Faso), some 2500 square meter of the vegetable garden were treated with that water saving soil conditioner. A smaller part of the garden remained untreated (control plot).
1997-07 Capacity building in the garden : members of the local women’s association Gueswende got information about TC-application and its role (Photo Monique Van Endert 1997)
In 1988, I was invited by the Dutch Committee Maastricht-Niou to carry out a reforestation project with my team of the University of Ghent (Belgium) in the village of Niou (Kourweogo Province, Burkina Faso). I will describe the success of that project later. Today, attention is paid to a similar reforestation project, set up in 1988 together with the Canadian Cooperation in Arbolle (Passoré Province, Burkina Faso).
It was decided to plant seedlings of a number of tree species with different dosages of TerraCottem soil conditioner (TC) on a clayey soil, completely barren in 1988 due to heavy deforestation by the local villagers during the preceeding years.
First, plant pits were created and the excavated soil was mixed with different dosages of TC to study the optimal dosage under these local conditions. Some plant pits functioned as control plots (no TC was added to the local soil).
At the start of the project in July 1988, the young saplings were 40-50 cm high on average. Thanks to some good rains during the rainy season (June-October), the hydrogels of the TC soil conditioner could stock a large quantity of water and they delivered this water gradually to the growing young trees during the 8 months long dry season. Thereby, the saplings continued their growth without any need for irrigation.
In December 1988, six months after planting, the growth of the individual trees was measured to compare growth differences due to a difference in TC-dosage.
Very soon, it became quite clear that TC had an interesting positive effect on tree growth. A dosage of 100 g of TC per plant pit showed to be close to optimal in these conditions. Due to our activities on the field, the soil was scarified by trampling and seeds of grasses and other weeds germinated and developed into a sparse vegetation cover.
Acacia nilotica saplings developed remarkably well, in particular with the optimal dosage of 100 g TC per plant pit.
In April 1989, we returned to the project to carry out new measurements. What a splendid view it was ! Almost all trees, except the control ones (without TC in the soil), were still brightly green with developing young leaves, a very exceptional situation during the dry season. Some saplings had disappeared, not because of the drought, but destroyed by locusts and termites.
In July 1990, two years after the start of the project, the original barren field was already transformed into a green area. Young trees were developing, accordingly to the dosage of TC in the plant pit. Another interesting aspect was the development of different species of weeds around the individual trees. Indeed, seeds of these weeds were blown in by the wind and those falling on the plant pit surface found relatively humid conditions in which they could germinate and grow (see green disks around the trees).
Some of the Acacia nilotica trees already had exceptional dimensions. It was almost unbelievable that these trees had grown to a height of more than 2 meters without any additional treatment. The only thing we did, was to plant the seedlings in July 1988 with a certain dosage of TC and let the rain make the TC functioning as a reservoir of water and nutrients. Such a growth was never seen before in these circumstances.
The general aspect of the plantation was changing gradually. Not only the young trees were continuously growing all year long, but the originally barren soil became slowly covered with grasses and other weeds. This “nature restoration” was an important secondary effect of the soil conditioning with TC.
In July 1994, six years after the start of the project, a splendid young wood was formed. Tree canopies were closing and the vegetation cover on the surface was also closing more and more. Of course, the flowering plants started to attrack numerous animal species : insects, birds, mice, squirrels etc. Biodiversity enhanced significantly.
In 1998, 10 years after plantation, nothing can be seen anymore of the original barren area : a remarkable success was booked with this reforestation project. Trees were already several meters high and the vegetation on the surface became very dense.
It is nice to know that since 1998 the same successes were booked with TC-reforestation projects in many other countries.
Stumbled across this page entirely by chance this evening (20.03.2007) while searching for something else – what a brilliant project! What has the response of the local people and the authorities been? Have there been no problems with people foraging for firewood, or with grazing goats etc.? Success stories like this deserve to be made much more well-known.
Since 1995, the soil conditioner TerraCottem (TC) has been tested intensively in many locations in the P.R. China. It was successfully used for reforestation, horticulture, agriculture, landscaping, sports turf and some other specific applications, like growing flowering plants in containers and pots.
A nice test case was the one at the Ministry of Forestry (Hepingli Dongjie, Beijing) were magnificent lawns were installed in front of the main entrance.
These are brilliantly green for the major part of the year and there is no need for intensive irrigation in the hottest and driest periods, thanks to the water and fertilizer stocking soil conditioner TC mixed with the substrate at a rate of 100 g TC per square meter.
Years after the installation of these lawns in the city center of Beijing, the overall landscaping effect of these lawns is still perfect. Technicians confirm the important water and fertilizer saving role of the TC, even after many years.
I already reported on an interesting experiment on growing tree seedlings, set up in Zanona (Cadiz/Andalucia/Spain). You may find this message in the November 2006 postings under Archives.
In May 1995, we showed the effect of the soil conditioner TerraCottem (TC) on seedlings of conifers. Seedlings were acquired in a nursery. Half of them were kept as control plants, the other half were treated with the TerraCottem soil conditioner (TC) at a dosage of 5 g TC per kg of potting soil. All plants got the same small volume of water at the same moment, so that a certain hydric stress was created for the seedlings under very dry conditions in this area of Southern Spain.
Six weeks later the dimensions of the seedlings were compared : length of the stem, length and volume of the root system.
Already after a few weeks, a remarkable difference is observed between the TC-treated seedlings (left) and the control ones (right)
When preparing for the Olympic Games in 2000, the authorities of the City of Sydney decided to create a dramatic change in certain parts of the city by introducing spectacular plantations of trees, shrubs and flowering plants. To name only two wellknown areas in the city center that turned completely green in a very short period : Cockle Bay Wharf and Darling Harbour. The secret for this fantastic success : the use of TerraCottem soil conditioner (TC) in the containers at the waterside of Cockle Bay Wharf and on the roof top of Darling Harbour, where a huge hanging garden was created.
TerraCottem soil conditioner was applied to solve the problems of regular watering of the containers with trees, shrubs and ornamental plants, used to embellish the waterfront at Cockle Bay. The potting soil in the containers was mixed with TC at a dosage of 5 g TC per kg of substrate. As TC stocks water and nutrients, it limits the need for regular irrigation in a significant way. As it also stimulates root growth and microbiological activities in the substrate, it improves plant growth in a spectacular way, whilst reducing water and fertilizer consumption.
For the same need of limiting the volume of irrigation water and fertilizers, the City of Sydney decided to mix TC soil conditioner with the substrate on the rooftop (also less weight !). A number of weeks after planting and seeding with typical species of the 5 continents, this rooftop garden became a splendid success. It is visited every year by tenthousands of visitors.
These two success stories with TerraCottem soil conditioner in landscaping projects of a city like Sydney show that TC can be used in extreme conditions for saving water and fertilizer. What was realized within the “concrete desert” of this city, can also be achieved in other cities of the world and in all desertlike areas of the drylands.
Greening of a rooftop or an avenue is submitted to the same irrigation problems as a reforestation project or a vegetable garden in the drylands. TC can be used as an effective tool in the combat of desertification.
Just reaching to our knees ! : Young Prosopis treated with TC in presence of the Minister of Public Health of the R.A.S.D. (center) and the Representative of Unicef Algeria, Mr. Raymond Janssens (right).
In 2005, Unicef Algeria invited me as a scientific consultant to study possible improvement of the living conditions in the refugee camps of the Sahraouis people in Southern Algeria (Sahara desert), looking for ways to enhance local food production. The main objective was to look for new possibilities to grow vegetables in small family gardens in the refugee camps in the desert with a minimum of brackish water, taken from the subsoil.
Nice Opuntia plantation, excellent yield in a short period
Planting spineless varieties of Opuntia can be very rewarding, not only to combat desertification, but also to produce fodder for animals. These varieties are growing quickly with a minimum of water in the drylands, like the ones in the very dry Nordeste of Brasil (see pictures).
Rows of cacti contribute to limit soil erosion
Cacti normally have a wide appeal to growers of ornamental plants, but they have only few economic uses. However, many cacti produce edible fleshy fruits (raw, jam, syrup). Some species are used in living hedges or even for furniture. Commercial plantations of the “prickly pear” Opuntia are found in Brasil, Mexico and California.
Rows on the contour lines
The disk- or racketlike, superposed parts of the Opuntia stems can be used as fodder. Goats, sheep and cows eat the fresh disks, cut into slices. One can also have the sliced disks sundried, grinded to flour and mixed with a bit of water for animal consumption.
In May 1995 an experiment was set up in Zanona (Cadiz/Andalusia/Spain) to show the effect of the soil conditioner TerraCottem (TC) on seedlings of conifers.
A number of seedlings was acquired in a nearby nursery. Half of them were kept as control plants, the other half were treated with TerraCottem soil conditioner (see http://www.terracottem.com) at a dosage of 5 g TC per kg of potting soil. All plants were watered in the same way (all the same day, all the same small volume of water to create a certain hydric stress for the seedlings under very dry conditions in the area).
Comparison of TC-treated conifer seedling (left) with control one (right).