Tag Archives: Inga

Dissemination of first Forest Futures results to policy makers in Cobija, Bolivia

The Honorable Luis Gatty Ribeiro Roca, Mayor of Cobija (capital of the Pando) promoting the publication of our agroforest manual

The Darwin Initiative Forest Futures project aims to mitigate threats to natural forest in the Bolivian Amazon by raising awareness of the value of these forests, supporting the diversification of non-timber forest products and adapting a soil-restoring agroforest technique to the Amazon. The project was launched in 2013 and this week we held a half-day conference in the capital of the Pando, Cobija. The aim of which was to disseminate our results and outputs to local decision makers who included the Vicegovernor of the Pando, Dra Paola Terrazas Justiniano, the Mayor of Cobija, Luis Gatty Ribeiro Roca, representatives of the Universidad Amazonica del Pando, the Autoridad Bosques y Tierra (Forest and Land Authority) several NGOs involved in rural development and journalists from five television stations and two radio stations. We had 73 people participate in the meeting which for us was a great success.

Cesar Aguilar Jordan, President of our partner NGO, Herencia, giving the opening address




The aim of this was to highlight the value of natural forest, both as a source of ecosystem services on which the Pando and the region depend, but also as a source of potential products which can either be harvested directly (non timber forest products) or cultivated in agroforest systems. The idea being that the perceived value of forest increases making unsustainable alternatives such as pasture for cattle or as sites for slash-and-burn seem less economical. Juan-Fernando Reyes from Herencia presented his vision for an integrated forest-based economy and future for the Pando, Bente Klitgaard outlined how the relationships between Kew, Herencia and our rural partners had developed and Alejandro Araujo Murakami presented a summary of the plant diversity of the Pando, ca 3,000 species and how this translated into stored carbon. I presented an overview of how Inga based agroforestry could help restore the soils of abandoned slash-and-burn sites to productivity and support sustainable agriculture in the region. In addition, with 73 participants at the conference it was a good opportunity to launch our Inga agroforest manual and promote the forthcoming book on economically promising Amazonian fruit tree species.


Cover of our forthcoming book on economically promising Amazonian fruit tree species

Producing an agroforest manual for rural people and NGOs

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First galley proof of our agroforest manual which is due for publication in September 2016

Since the start of our Forest Futures project I had been thinking about the best way to support the production of agroforests once we have left. We had committed to produce a manual but my initial thoughts were that this is a little old-fashioned and that an electronic publication formatted for mobile phones would be a good option. The reality, however, is that Bolivia has very poor internet access. Even in Cobija, the capital of the Pando, internet acesss is sporadic and poor. Once in the field it is only available at a few points along the main road . We therefore decided to opt for a printed manual, of the size that it will fit on a narrow shelf or somebody’s day pack and on high quality paper that will resist the high humidity of the tropics.


The next decision was how to best communicate to the people we working with. I believe that a majority text-based format would not be of great interest or very accessible for the communities we work with. I decided on an image-rich poster-like format. This was because posters remain a major communication tool by Government and NGOs in the region and so local people will be familiar with them, secondly I assumed that Governments and NGOs know what they are doing! Following this I had to think quite hard about content. Whilst the mechanics of establishing a plot are relatively straightforward to explain what has struck me working with rural people is that communicating the underlying principles of agroforestry as we practice it is very challenging.

Through our work with rural communities we realised that a lot of background knowledge needs to be communicated if people are to understand the point of agroforestry

This is in part because a lot of their knowledge on soils and and nutrient cycling is based on temperate systems, either in Europe or the Andes where soils are replenished by the action of frost or weathering of rock. Amazonian soils have been leached over millions of years and hold few nutrients for plants but this is not obvious looking at the lush dense forest growing on them. So not only do we need to explain that the soils are very poor but then explain how such rich forest grows on them. Similarly, it is less challenging for people living away from the Amazon to accept that cutting forest is not sustainable, but quite a different thing when it is your livelihood that depends on slash-and-burn and when you have always been surrounded by forest for as far as the eye can see and that this has been the case for as long as anyone can remember. The upshot of these considerations are a substantial introduction that attempts to explain all of the background and context whilst assuming little prior knowledge.

You can download the pdf version of the manual hereA printed version is available on request for those working in Latin America.

Cuando podar los árboles en sistemas agroforestales

Rolman Velarde, Terry Pennington y Jaime Leon revisando nuestro sitio en Motacusal por octubre 2015. Este sitio ha sido listo para podar desde julio.

Desde julio los árboles de Inga (pacay) en nuestra primera parcela que plantamos al finales de febrero 2014 son bastante grande para podar. Pero no los hemos podado porque las condiciones no son buenos para hacerlo. Como explicó Dr. Terry Pennington, experto sistemas agroforestales con Inga,  no debe podar árboles durante la estación seca y el mejor momento para hacerlo es un par de semanas en la temporada de lluvias. La razón de esto es que cuando se quita todas las hojas y las principales ramas de un árbol, la pérdida por encima del suelo se refleja por debajo del suelo. Es decir que cuando podas un parte de las raíces mueren lo que va disminuir la capacidad del árbol a conseguir agua . Durante la estación seca, hay poca agua en el suelo y si  ha podado el árbol se queda sin bastante raíces para sobrevivir.

El experto en Inga Terry Pennington revisando la parcela de Motacusal y avisando sobre como y cuando hacer la poda

Por la Amazonia la estación seca  empieza por abril / mayo y termina por octubre / noviembre. Este año ha sido muy seco por el fenómeno de El Niño entonces hemos tenido que adelantar de podar nuestros arboles. Después de podar necesitas dos meses de lluvia. Ya estamos por febrero entonces es possible que no va alcanzar el tiempo para podar antes de la llegada de la estación seca otra vez

Los arboles de Inga por nuestro sitio de Palacios. Todavía están de  tamaño para podar y el sitio se inunda por febrero

Por una otra parcela, Palacio, también es importante seleccionar un buen tiempo para podar. La razón es que este sitio se inunda por un par de semanas cada febrero. Entonces tenemos que asegurar que los arboles tienen el tiempo para brotar o el menos que se podan arriba del nivel del agua.  Estamos descubriendo que puede se algo complicado ubicar un buen tiempo para podar!

How to pollard Inga trees for agroforest systems

A member of the Motacusal community pollarding the first Inga tree.

In addition to getting the timing right it is also important to pollard at the right height, point on the stem and using the right tools. Pollarding involves cutting the top and branches off of a tree. Normally this is done to promote resprouting at the top of the stem but in the case of our agroforest system we want to allow light into our plot for the cultivation of annual crops or fruit trees. This means that we need to cut the stem at the right height so as to shade the crops below and to give them enough time to grow and be harvested before the branches have regrown to their original length. For this purpose we are aiming to pollard at approximately 1.30 m in height, the height of somebody’s chest.

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It is important to cut the main stem using a pruning saw, a few centimetres above or below a branch point, ideally at a height of between 1.30-1.50 m.

The best place to cut the stem is a couple of centimetres above or below a branch or branch scar. The reason for this is that new branches will sprout from these points. If you cut through the branch point or scar then the tissue from which new branches will develop will be damaged and new branches will be generated at the nearest point above or below it, meaning that it will be higher or lower than desired. The choice of implement is also important. Whilst it is much quicker and more natural to want to use a machete, this is not the ideal way to cut the branch. The reason for this is that it is hard to get a clean clut with a machete as Inga wood splits very easily and the split wood is vulnerable to insect and fungal infections.

When to pollard Inga agroforest

Rolman Velarde, Terry Pennington & Jaime Leon inspecting our Motacusal site in October. This site has been ready to pollard since July.

The Inga trees in the first plot that we planted at the end of February 2014 have been big enough to pollard since July. We have not pollarded, however, as the conditions have not been right to do so. As Dr Terry Pennington, Inga agroforest expert explained, you should not pollard trees during the dry season and the best time to do so is a couple of weeks into the wet season. The reason for this is that when you remove all of the leaves and main branches of a tree, the above-ground loss is mirrored below ground. That is the roots die back comensurate with what was lost above. During the dry season there is little water in the soil and the tree needs all its roots to obtain the moisture it needs. Therefore if you have pruned during the dry season, the tree is left without enough roots to survive.

Inga and Inga-agroforest expert Terry Pennington inspecting the Motacusal site and providing advice on the best time to pollard

In the case of the Bolivian Amazon, the dry season normally runs from April/May to October/November. This year has been particularly hot and dry, possible a consequence of the El Niño phenomenon, and so pollarding our plot would likely kill all of the trees. We will therefore wait until the middle of November when the rains should have started before pollarding.

The Inga trees at our seasonally flooded Palacio site are not yet big enough to pollard and when they are finding an appropriate time to pollard will be complicated

At another of our sites, Palacio, the timing of pollarding is also important. The reason for this is that it is a site which floods for a couple of weeks each February. We therefore have to be careful that we leave enough time between pollarding and the floods. Or at least make sure that we pollard high enough so that the new shoots emerge above the floodwaters. So here again the timing of pollarding and the associated planting of crops needs careful thought!

Our first Inga agroforest plots 14-17 months after planting

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Our Motacusal agroforest plot 17 months after planting. The closed canopy has prevented weeds growing. Notice the large amount of leaf-litter on the ground which will provide valuable organic matter for the soil. Image: Rolman Velarde

We established our first Inga agroforest plot  just over 17 months ago. Since then the seedlings have grown into 5 m tall trees, their crowns  touching and shading out any potential weeds. They have captured the site meaning that it no longer needs any maintenance, allowing farmers to choose when to pollard (prune) at a time that best suits them. In the Bolivian Amazon the best time of year to sow plants is at the beginning of the wet season in October and so we are planning to return to complete this last step in the process.

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The Las Palmas fruit tree agroforest system 14 months after planting. This site was an abandoned cattle pasture and although the trees are growing slowly they look healthy. Image Rolman Velarde.

Continue reading Our first Inga agroforest plots 14-17 months after planting

Visitando a sistemas agroforestales Peruanos

Participantes visitando la finca Marques en La Merced (Chanchamayo) con Juan Santos Cruz

Uno de los elementos más importante de nuestro proyecto es convencer a las comunidades rurales de que los sistemas agroforestales basados en Inga les ayudarán a utilizar sus tierras con mayor intensidad sin necesidad de talar el bosque. Esperamos lograr esto de dos maneras: 1) desarrollar parcelas agroforestales como demostración en una red de comunidades asociadas con el proyecto, y 2) tomar representantes de estas comunidades asociadas para visitar parcelas agroforestales ya productivas. Visitar estas parcelas es una buena manera de dejar que la gente vea por sí misma lo que sus sistemas agroforestales van a lograr en pocos años, y también de facilitar el intercambio de experiencias entre campesinos. Tal vez intercambios entre campesinos tiene más peso/fuerza que hablar con un científico, técnico o una ONG ya que tienen intereses y conocimientos similares/comunes.

Continue reading Visitando a sistemas agroforestales Peruanos

Forest Futures Peru visit

Participants visiting Marques farm in La Merced (Chanchamayo) with Juan Santos Cruz

One of the most important elements of our Forest Futures project is to get rural communities to believe that Inga-based agroforest systems will help them use their land more intensively without the need for regular land-clearance. We hope to achieve this in two ways: 1) develop demonstration agroforest plots in a network of partner communities, and 2) take representatives of partner communities to see established working systems. Visiting established communities is a powerful way of letting people see for themselves what their agroforests will like in a few years but also, as  importantly,  it facilitates the sharing of experiences, farmer to farmer.  Speaking to somebody from the same profession who is using agroforest is likely more convincing than speaking to a scientist, technician or NGO whose livelihoods are not on the line.

Continue reading Forest Futures Peru visit

Planificación de los primeros cultivos

La parcela agroforestal de Motacusal. Los plantines fueron plantado el 27 de febrero 2014 y ya han crecido en arboles listo para podar. Foto tomado el 18 de marzo 2015. Empuje para ver a Rolman Velarde hablando de la parcela

Apenas un año después de la plantación tenemos dos parcelas agroforestales que ya no necesitan ser limpiado. Han efectivamente  ‘capturados’ sus sitios. Estos sitios son por los comunidades de Palacios y Motacusal. La siguiente etapa es convertir las en sistemas productivas, es decir iniciar a cultivar anuales y frutales en ellos. Mientras que es un proceso sencillo, hay un par de reglas básicas a seguir en función de si se están cultivando cultivos anuales (maíz, arroz, yuca, etc.) o árboles frutales. En ambos casos tenemos que podar los árboles de Inga para liberar el sitio y asegurar que los cultivos reciben suficiente luz.

Cultivos anuales. En el caso de los cultivos anuales es importante: 1) Podar los árboles de Inga, al mismo tiempo quese planta los cultivos anuales. Esto es porque una vez podado hay una ventana de crecimiento de cultivos de seis meses antes de que las ramas crecen de nuevo y una vez más capturan el sitio. 2) Sólamente se puede podar los árboles de Inga una vez que las ramas de callejones vecinos se tocan, en este momento se han desarrollado a un tamaño suficiente, por encima y por debajo del suelo, para apoyar los cultivos. Una vez los árboles de Inga podado es necesario dejar las hojas, ramitas y ramas menores cortado en los callejones agroforestales donde van a servir como mantillo / materia orgánico por el suelo. Las ramas más grandes se pueden tomar como leña.

Arboles de Inga plantado para apoyar al cultivo de frutales. Igualmente son de un ano de edad y ya estan listo para la plantacion de plantines de frutales

Cultivos de frutales. En el caso de los árboles frutales no necesita podar a los árboles de Inga  hasta que sus copas se tocan, o que están echando sombra excesiva a los frutales. Este último depende de la especie de frutal plantado y deben estar a la discreción del agricultor. Además, no es necesario podar a todos los árboles de Inga al mismo tiempo o eliminar todas las ramas: los árboles pueden ser podado  según la necesidad para generar la sombra óptima para los frutales vecinos. Igual que en el caso de plantas anuales cuando se poda a los árboles de Inga las hojas cortadas, ramitas y ramas menores deben ser dejados en los callejones donde van a servir como mantillo. Las ramas más grandes se pueden tomar como leña. Continue reading Planificación de los primeros cultivos

Planning the planting of our first crops!

Rolman Velarde in the Motacusal plot, one year after planting. The plot is now ready for crops! Click on the image to see me giving an intoiduction to the plot.

Barely a year after planting we now have two agroforest plots that no longer need weeding and have effectively ‘captured’ their sites. These are Palacios and Motacusal. The next stage is to make these agroforest systems productive, that is to start growing crops in them. Whilst a straightforward process there are a couple of basic rules to follow depending on whether you are cultivating annual crops (maize, rice, yucca etc) or fruit trees. In both cases we need to prune or pollard the Inga trees to release the site and ensure that the crops get enough light.

Annual crops. In the case of annual crops it is important to: 1) pollard the Inga trees at the same time as the annual crops are planted. This is because once pollarded there is a six-month growing window before the branches grow back and once again capture the site. 2) to only pollard Inga trees once the branches of neighboring rows are touching, this is when they  have developed to a sufficient size, above- and below-ground to support crops. Once the Inga trees are pollarded the pruned leaves, twigs and minor branches need to be left in the agroforest alleys where they will serve as a mulch. The larger branches can be taken as fuel wood.

Rolman Velarde in the fruit tree part of our agroforest plot. The Inga trees at the wider 4 m spacing are growing well despite a slower start.

Fruit crops. In the case of fruit trees the Inga trees do not need to be pollarded until either their crowns are touching, or they are casting excessive shade on the fruit trees. The latter depends on the nature of the fruit tree being planted and should be at the discretion of the farmer. In addition, it is not necessary to pollard all of the trees at the same time or even to remove all of the branches: trees can be pollarded as needed and to the extent necessary to generate the optimum shade for the fruit trees. As in the case of annuals when the Inga trees are pollarded the cut leaves, twigs and minor branches need to be left in the agroforest alleys where they will serve as a mulch. The larger branches can be taken as fuel wood.

Continue reading Planning the planting of our first crops!