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Farming with trees January 19th, 2020 by

Vea la versión en español a continuación.

On a rocky hillside an hour from the city of Cochabamba, agronomist Germán Vargas points out a molle tree. It’s growing from a crack in a sandstone boulder with little or no soil. Native trees are well adapted to such conditions and don’t need much to survive, Germán observes.

Molle can be cut for good firewood, but it also casts an inviting shade, with a thick carpet of fallen leaves. Trees grown on farms also have multiple uses. Some have deep roots that bring up nutrients from beneath the top soil. Even in places like Cochabamba, with a long dry season, many trees stay green all year round. The trees have found water to keep their leaves moist, despite the bone-dry subsoil. Germán explains that farming with trees, or agroforestry, mimics natural forests, where rich soils are created without irrigation or fertilizer.

Four years ago, Germán and two colleagues bought some land to put their ideas on agroforestry into practice. They now have 1500 apple trees in a 4-hectare orchard, on a former onion farm, where the intensive use of chemical fertilizers and pesticides had depleted the soil of nutrients.

Germán and his friends bought some apple seedlings from a local nursery. They chose improved Brazilian apple varieties, such as Eva and Princesa, which do well in the highland tropics of South America, where it can get cool, but does not freeze.

Germán and his colleagues plant a few more trees every year. They start each new planting by digging a trench every two to three meters (depending on the slope), to let water infiltrate the soil. They throw the soil just uphill of the trench to create a barrier, slowing down the runoff of water and trapping sediment.

Germán is careful not to scrape the soil surface with hand tools; the top soil is so thin that rough handling could remove it all. They add a little compost to the soil, mimicking a natural forest, where fallen leaves and trees rot and release nutrients back into the soil. However, forests also have an understory, so potatoes, maize, lettuce, amaranth, rye and other plants are sown between the trees. After planting the vegetables, a straw mulch keeps down the weeds.

Other trees are planted among the apples, including natives like molle and exotic species, which are monitored to see if they can make a positive contribution. Germán brought seed of the chachafruto tree from Colombia, for example. The plant is adapting well. When the only date palm in Cochabamba, another non-native species, dropped a cluster of dates in a city park, Germán salvaged the seed and planted some on the farm. The non-fruit trees make useful leaf litter, adding nutrients and helping to keep the soil moist.

The apples were remarkably free of mildew, mites, fruit flies and other common pests, but even if they were to appear, Germán avoids using pesticides. The team managing the orchard makes a spray with cow manure, raw sugar, bone meal, sulfur, ash and lime. Reasoning that all stone has mineral nutrients, they add a little “rock flour,” made by grinding a soft, local, sedimentary stone (shale). A culture of beneficial microorganisms is added to ferment the mix in sealed drums. The agroforesters culture the microorganisms themselves, but they get the starting culture in the local forest, bringing in a few handfuls of fallen leaves that have started to decompose. The sulfur and the lime come from the farm supply store. This sulfur blend is sprayed about 5 times a year on the trees, and it seems to be working, since the apples have almost no pests, except for birds, and the annual plants are thriving.

This innovative agroforestry system needs regular attention and it is obviously a lot of work, especially at first, because it is established by hand, without machinery. Some of the radishes have gone to seed, and in a few beds the weeds are lush and healthy, waiting to be cut down for the next vegetable crop.

Farmers can learn from forests to make better use of water, conserve the soil and manage pest and disease naturally, thanks to the diversity of plants. Farming with trees can yield a good harvest of fruits and vegetables, while building and sustaining soils.

Related blog stories

Apple futures

What counts in agroecology

Gardening against all odds

Enlightened agroecology

Watch some related videos

SLM02 Fanya juu terraces shows how to make infiltration trenches, that form terraces.

SLM03 Grevillea agroforestry

SLM08 Parkland agroforestry

Scientific names

The molle tree is Schinus molle

The chachafruto tree (widespread in South America) is Erythrina edulis

Note

Sulfur deficiency is a problem in apples. The symptoms are similar to nitrogen deficiency, including pale leaves. Sulfur deficiency can be corrected by sprays (Westwood 1993: 200-201).

Westwood, Melvin Neil 1993 Temperate-Zone Pomology: Physiology and Culture. Third edition. Portland, Oregon: Timber Press.

Acknowledgements

Thanks to Germán Vargas, Marcelina Alarcón and Freddy Vargas, the agroforesters. Germán is the executive administrator of the NGO Agroecología y Fe.

LA AGRICULTURA CON ÁRBOLES

En una ladera rocosa a una hora de la ciudad de Cochabamba, el ingeniero agrónomo Germán Vargas señala un molle. Crece en una grieta de una roca arenisca, con poca o ninguna tierra. Los árboles nativos están bien adaptados a estas condiciones y no necesitan mucho para sobrevivir, observa Germán.

El molle hace buena leña, pero también da una rica sombra, con una gruesa alfombra de hojas caídas. Los árboles en el agro también tienen múltiples usos. Algunos tienen raíces profundas que traen los nutrientes de debajo del suelo. Incluso en lugares como Cochabamba, con una larga época seca, muchos árboles se mantienen verdes durante todo el año. Los árboles han encontrado agua para mantener sus hojas húmedas, a pesar del subsuelo seco. Germán explica que la agricultura con árboles, o la agroforestería, imita a los bosques naturales, donde se crean suelos ricos sin irrigación ni fertilizantes.

Hace cuatro años, Germán y dos colegas compraron un terreno para poner en práctica sus ideas sobre agroforestería. Ahora tienen 1500 manzanos en un huerto de 4 hectáreas, en una antigua granja de cebollas, donde el uso intensivo de fertilizantes químicos y pesticidas había agotado los nutrientes del suelo.

Germán y sus compañeros compraron algunos plantines de manzana en un vivero local. Escogieron variedades mejoradas de manzanos brasileños, como Eva y Princesa, que se desarrollan bien en los trópicos de las alturas de América del Sur, donde puede hacer frío, pero no se congela.

Germán y sus colegas plantan unos pocos árboles más cada año. Comienzan cada nueva plantación cavando una zanja cada dos o tres metros (dependiendo de la pendiente), para dejar que el agua se infiltre en el suelo. Lanzan la tierra justo cuesta arriba de la zanja para crear una barrera, frenando el escurrimiento de agua y atrapando el sedimento.

Germán tiene cuidado de no raspar la superficie del suelo con herramientas; el suelo negro de la superficie es tan delgado que sin tener cuidado sería posible quitarlo todo. Añaden un poco de abono al suelo, imitando un bosque natural, donde las hojas y los árboles caídos se pudren y liberan nutrientes de nuevo al suelo. Sin embargo, los bosques también tienen un sotobosque, por lo que las papas, el maíz, la lechuga, el amaranto, el centeno y otras plantas se siembran entre los árboles. Después de plantar las verduras, un mantillo de paja mantiene las malas hierbas.

Entre las manzanas se plantan otros árboles, incluyendo especies nativas como el molle y especies exóticas, que son monitoreadas para ver si pueden hacer una contribución positiva. Germán trajo semillas del árbol de chachafruto de Colombia, por ejemplo. La planta se está adaptando bien. Cuando la única palmera datilera de Cochabamba, otra especie no nativa, dejó caer un racimo de dátiles en un parque de la ciudad, Germán recuperó algunas semillas y las plantó en la finca. Los árboles no frutales botan hojas, añadiendo nutrientes y ayudando a mantener el suelo húmedo.

Las manzanas estaban notablemente libres de mildiu, ácaros, moscas de la fruta y otras plagas comunes, pero incluso si aparecieran, Germán evita el uso de pesticidas. El equipo que maneja el huerto fumiga con un biol hecho de estiércol de vaca, chancaca, huesos molidos, azufre, cenizas y cal. Razonando que toda piedra tiene nutrientes minerales, le agregan un poco de “harina de roca”, hecha al moler una piedra sedimentaria suave, local (lutita). Para fermentar la mezcla, agregan un cultivo de microorganismos buenos a los tambores sellados. Los agroforestales cultivan sus propios microorganismos, pero obtienen la cultura inicial en el bosque local, trayendo unos pocos puñados de hojas caídas que han comenzado a descomponerse. Compran el azufre y la cal en la tienda agropecuaria. Fumigan el biol con azufre unas 5 veces al año en los árboles, y parece que funciona, ya que las manzanas casi no tienen plagas, excepto los pájaros, y las plantas anuales están prosperando.

Este innovador sistema agroforestal necesita atención regular y obviamente es mucho trabajo, especialmente al principio, porque se establece a mano, sin maquinaria. Algunos de los rábanos han empezado a echar semilla, y en algunas camas las hierbas silvestres son exuberantes y saludables, esperando ser cortadas para el siguiente cultivo de hortalizas.

Los agricultores pueden aprender de los bosques a hacer un mejor uso del agua, conservar el suelo y manejar las plagas y enfermedades de forma natural, gracias a la diversidad de plantas. La agricultura con árboles puede producir una buena cosecha de frutas y verduras, a la vez que construye y mantiene los suelos.

Otros blogs sobre el tema

Manzanos del futuro

Lo que cuenta en la agroecología

Un mejor futuro con jardines

La luz de la agroecología

Videos relacionados

SLM02 Terrazas fanya juu muestra cómo hacer zanjas de infiltración, que forman terrazas.

SLM03 Agroforestería con grevillea

SLM08 Agroforestería del bosque ralo

Nombres científicos

El molle es Schinus molle

El chachafruto (árbol bien distribuido en Sudamérica) es Erythrina edulis

Nota

La deficiencia de azufre es un problema común en los manzanos. Los síntomas son parecidos a los de la deficiencia de nitrógeno, incluso las hojas pálidas. La deficiencia de azufre puede ser corregida con fumigaciones (Westwood 1993: 200-201).

Westwood, Melvin Neil 1993 Temperate-Zone Pomology: Physiology and Culture. Third edition. Portland, Oregon: Timber Press.

Agradecimientos

Gracias a Germán Vargas, Marcelina Alarcón y Freddy Vargas, por su ejemplo con la agroforestería. Germán es el administrador ejecutivo de la ONG Agroecología y Fe.

Keep your cows in the family October 27th, 2019 by

In the 1980s, the Portuguese farmers I lived with kept two or three cows per household. Instead of hosing down the barns—the greatest use of water on dairy farms—the cows were stabled in a large room on the ground floor of the farm house. Every couple of days, farmers would lay down a clean bed of gorse, fern, heather and other wild plants. Instead of creating toxic lagoons of manure, the families would dig the manure out of the barns and spread it on their fields as organic fertilizer.

The parish of Pedralva, near Braga, Portugal, had four milking parlors. Twice a day the farmers (almost all women) would walk their cows down the lane to the milking parlor, where the operator, also a young woman, would milk the cows mechanically, record the amount of milk (clearly visible in a large, glass jar) and pipe the milk into a cold storage tank, to be picked up later by the dairy.

The milking parlor became a place where the farmers would chat and exchange ideas as they stood in line with their cows. I realize now that it was also a chance for the cows to get out of the house and take a stroll. The cows were not pets, but they all had names, enough to eat and drink, and they were never caged. The cows were usually fed on leftover maize stalks and pasture grass, although a handful of farmers with a dozen cows were starting to make silage. So, most of the feed was a byproduct of food production, rather than a diversion of human food to livestock.

The documentary film “Cowspiracy,” by Kip Anderson and Keegan Kuhn, tells of the complacency of Greenpeace, the Sierra Club, Surfrider Foundation, Rainforest Action Network, and Oceana: large, environmental organizations that ignore animal farming as a leading cause of climate change. Livestock account for 51% of global greenhouse emissions, while the whole transportation sector makes up just 13%. Cows make greenhouse gas as they fart out methane while the tractors and fertilizer factories all burn fossil fuel.

Livestock in the USA produce 30 times more feces than people. Fecal slurry from cows and pigs is kept in “lagoons” that often leak into rivers. In tropical countries forests are cleared to make pastures. Much of the forest burned in Bolivia this year was being cleared to graze cows for beef exports to China.

In Eat for the Planet, journalists Nil Zacharias and Gene Stone raise similar concerns, especially about the use of water. In the USA it takes 2000 liters of water to make a liter of milk, 15,000 liters of water to produce a kilo of meat. More corn, soybeans and wheat is produced to feed animals than humans, requiring vast amounts of water, energy and land.

Add this all together and it makes sense that the livestock sector is responsible for 51% of human-caused greenhouse gases.

Food and Animal Welfare, a recent book by Henry Buller and Emma Roe, raises concerns about the cruelty inflicted on the animals themselves. Cows, pigs and chickens have inherited instinctive behaviors from their wild ancestors: chickens like to build nests for their eggs, pigs love to dig into the moist earth, and cows enjoy grazing in the sunshine. The animals become stressed when they are unable to act out these behaviors.

On small, family farms, animals are usually handled in kinder, more environmentally sound ways. Adopting this approach on factory farms is costly and easy to avoid where regulation of animal welfare is poor and consumers don’t know or don’t care about the stresses animals face when penned up all day, every day, unable to move.

Cruelty to animals, deforestation, fecal pollution, the extravagant waste of water and the use of food grains to feed animals are all real problems of agriculture if the animals are just seen as cogs in the factory. But I have seen family farms in Latin America, Africa and Bangladesh where animals are treated a bit like they were in Portugal in the 1980s. The animals are kept clean without big hoses of water. The manure is used as fertilizer instead of being stored in lakes of filth. The animals eat at least some crop residues and spend at some time outdoors. The cows do still fart on family farms, but most other environmental problems are mitigated. Governments and the public should be thinking of more ways to encourage shorter food chains, decent prices for family farmers, enforcement of better standards, and research on appropriate technologies.

Further reading

Bentley, Jeffery W. 1992 Today There Is No Misery: The Ethnography of Farming in Northwest Portugal. Tucson: University of Arizona Press.

Buller, Henry, and Emma Roe 2018 Food and Animal Welfare. London: Bloomsbury Publishing. 222 pp.

Zacharias, Nil and Gene Stone 2018 Eat for the Planet: Saving the World One Bite at a Time. New York: Abrams Image. 160 pp.

Related blog stories

Stuck in the middle

It takes a family to raise a cow

Watching videos to become a dairy expert

Veterinarians and traditional animal health care

Salt blocks and mental blocks

The red bucket

A brief history of soy

Videos about caring for animals on smallholder, family farms

Hand milking of dairy cows

And many other livestock videos on Access Agriculture

Spanish mulch September 22nd, 2019 by

Linguists will tell you that each language arranges the world differently. No two languages classify objects, activities or emotions in the same way. This is especially true of the words used in farming.

I was reminded of this recently when translating a video script from English to Spanish. The video, from northern India, forced me to grapple with “mulch”, an English word that is also widely used in Spanish, in real life and on the Internet.  Yet the world’s authority on the Spanish language, the Real Academia Española, does not include “mulch” in its magnificent dictionary, the Diccionario de la Real Academia de la Lengua Española.

It is odd that “mulch” is a new word in Spanish, when it is an old word in English. The Oxford English Dictionary defines mulch as a “Partly rotted plant material, etc.; (Horticulture) loose material consisting of straw, decaying leaves, shredded cuttings and bark etc., spread on soil or around or over a plant to provide insulation, protect from desiccation and deter weeds.” “Mulch” comes from a Middle English word, “molsh” or “mulsh” and has been in the language at least since 1440, and possibly much earlier.

I had my doubt about using “mulch” in Spanish. Various on-line dictionaries suggest “mantillo”, literally “little blanket” instead. But a web search of mantillo usually shows commercial bags of chipped bark used for landscaping and suppressing weeds. Not quite the same as the straw, leaves and husks that farmers have on hand.

I wrote to three agronomists I respect, native Spanish speakers who work closely with farmers. They confirmed that “mulch” was the word to use in Spanish. But one offered a little twist: if the video from northern India was being translated into Quechua, we could say “sach’a wanu.” Now there is a term to savor. “Wanu” means dropping, and is the source of the English word “guano,” meaning bird dung. In Quechua, “wallp’a wanu” is chicken dung, “llama wanu” is llama dung, and “sach’a wanu” is forest mulch, or the fallen leaves of trees.

I was back where I started. So, I decided to use “mulch” in the script, although at the first mention I did offer the alternative “mantillo.”

While languages describe the world in different ways, they also level those differences as they aggressively borrow words from each other, for example “silo”, “lasso”, and “stevedore.” These are all recent loanwords from Spanish to English. New words take time to be defined in dictionaries, which cautiously avoid including fad words that may fade away before really entering the language. But one day “mulch” will be included in the Diccionario de la Real Academia, joining “whisky,” “sandwich,” and other recent English loan words that have enriched the Spanish language.

Watch the video

Mulch for a better soil and crop

Two heads film better than one September 15th, 2019 by

Vea la versión en español a continuación.

I used to think that committees and group work killed creativity, but teamwork can help individuals produce things – like a cool video – that they couldn’t do by themselves.

Late last year, I was part of a team making a video in the southern Altiplano of Bolivia, along with Paul (the director), Marcella (the cameraperson) and Milton Villca. Milton is an agronomist who grew up in a village on the windswept plains where we were filming. He still lives in the area, helping local farmers to cope with challenges, especially the immense loss of soil caused by wind erosion.

After watching Marcella film for two days, Milton confided that he had tried making his own video, about a wasp that attacks and helps to control some of the caterpillar pests of the quinoa crop. But like the farmers, Milton had also struggled with the wind, losing two cameras because of damage by the fine sand. He’d continued filming the wasps with his cell phone, but he told Marcella he wasn’t sure about the quality of the images. Would she mind taking a look at them?

Marcella was happy to watch Milton’s video clips. All was fine. There were fabulous close ups of a wasp that digs a tunnel in the earth, hides it with grains of sand, finds a big, fat caterpillar, paralyzes it, and drags it back to the burrow, which the wasp is miraculously able to find, with the precision of a GPS. The video clips showed how the wasp uncovers the nest, inserts the unfortunate caterpillar, and lays an egg on it. A wasp grub hatches from the egg, eats the caterpillar and eventually emerges in the summer as an adult wasp.

Paul was immediately taken by the story of the wasp, which locals call nina nina. In our interviews with farmers for a video on windbreaks he decided to also ask them what they knew about the wasp. Unlike many parasitic wasps, which are too small to see clearly with the naked eye, the nina nina is pretty big, and local people know about it and can describe its ecology.

Asking a professional cameraperson to critique your videos can be daunting, but Milton no doubt sensed that Marcella would give him sympathetic and positive criticism. His risk paid off. We collaborated with Milton to write a script for his video. Marcella edited his clips and combined them into a short video, which we are proud to release this week.

Watch the video

The wasp that protects our crops

Related video

Living windbreaks to protect the soil

Related blog stories

Slow recovery

Awakening the seeds

Organic agriculture and mice

Acknowledgements

Milton Villca works for the Proinpa Foundation. Our work was generously supported by the CCRP (Collaborative Crop Research Program) of the McKnight Foundation.

DOS CABEZAS FILMAN MEJOR QUE UNA

Por Jeff Bentley, 15 de septiembre del 2019

Yo solía pensar que los comités y el trabajo en grupo mataban la creatividad, pero el trabajo en equipo puede ayudar a los individuos a producir cosas – como un video genial – que no podrían hacerse por sí mismos.

A finales del año pasado, formé parte de un equipo que hacía un video en el Altiplano sur de Bolivia, junto con Paul (el director), Marcella (la camarógrafa) y Milton Villca. Milton es un técnico agrónomo de un pueblo del altiplánico ventoso donde filmábamos. Él todavía vive en la zona, ayudando a los agricultores locales a manejar sus desafíos, especialmente a la inmensa pérdida de suelo causada por la erosión del viento.

Después de ver a Marcella filmar durante dos días, Milton confió que él había intentado hacer su propio video, sobre una avispa que ataca y ayuda a controlar algunos de los gusanos plagas del cultivo de la quinua. Pero al igual que los agricultores, Milton también había luchado contra el viento, perdiendo dos cámaras debido a los daños causados por la arena fina. Había seguido filmando las avispas con su celular, pero le dijo a Marcella que no estaba seguro de la calidad de las imágenes. ¿Ella estaría dispuesta a verlas?

A Marcella le encantaron los videos de Milton. Hubo excelentes primeros planos de una avispa que excava un túnel en la tierra, lo esconde con granos de arena, encuentra una oruga grande y gorda, la paraliza y la arrastra hasta el túnel del nido, que la avispa milagrosamente logra encontrar, como si tuviera un GPS. Los videos muestran cómo la avispa descubre el nido, inserta al desafortunado gusano y pone un huevo en él. Luego, la cría de la avispa sale del huevo, se come al gusano y eventualmente emerge como una avispa adulta en el verano.

A Paul le cautivó inmediatamente la historia de la avispa, a la que la gente local llama nina nina. En nuestras entrevistas con los agricultores para un video sobre las barreras vivas, decidió también preguntarles lo que sabían sobre las avispas. A diferencia de muchas avispas parásitas, que son demasiado pequeñas para ver claramente a simple vista, la nina nina es bastante grande, y la gente local sabe de ella y puede describir su ecología.

Pedirle a un camarógrafo profesional que critique sus videos puede ser desalentador, pero Milton sin duda sintió que Marcella le daría una crítica positiva, con empatía. Su riesgo valió la pena. Colaboramos con Milton para escribir un guion para su vídeo. Marcella editó sus clips y los combinó en un video corto, que estamos orgullosos de lanzar esta semana.

Ver el video

La avispa que protege nuestros cultivos

Vídeo relacionado

Barreras vivas para proteger el suelo

Historias de blogs relacionadas

Recuperación lenta

Despertando las semillas

Organic agriculture and mice

Agradecimientos

Milton Villca trabaja para la Fundación Proinpa. Nuestro trabajo fue generosamente apoyado por el CCRP (Programa Colaborativo de Investigación sobre Cultivos) de la Fundación McKnight.

Native potatoes, tasty and vulnerable September 8th, 2019 by

Vea la versión en español a continuación

Of well over 4000 potato varieties, the great majority only grow in the Andes, a cordillera of great heights (with farming up to 4500 meters above sea level) and tropical latitudes (with little variation in daylight hours between summer and winter). Potato varieties adapted to these special conditions can rarely survive outside the Andes.

The native varieties are endangered, and if they disappear, they will take with them the genes that breeders need to create the varieties adapted to a changing world.

But the Andean farmers fear the extinction of native potatoes for other reasons. Near Cusco, Santiago Huarhua and Ernestina Huallpayunca, with their children, tell us that native potatoes are much nicer to eat than the modern varieties. The native potatoes are of many colors, even red and blue. They are floury and tasty. Don Santiago and doña Ernestina produce them only with natural fertilizer, which they say helps to preserve the potato’s special flavor. The couple grows the potatoes on the high mountain slopes above their village, while the so-called improved potatoes are white and are produced with chemical fertilizer, on the valley bottom.

Even though the family preserves native potatoes, they grow more of the improved ones, because of market demand, to make fried potatoes and chips. The native potatoes tend to be smaller and too dry to fry, but perfect for boiling.

Don Santiago says that when he was a child, there were many native potato varieties, more than he can remember, but now there are only five. He shows us where he keeps his seed potato. He has three shelves, each about one by two meters, enough to plant about 1500 square meters of each variety; that makes one small plot for each kind of potato. The survival of these vulnerable varieties depends on a few kilos of seed, curated by relatively isolated households.

In recent years, Peruvians have started to appreciate these little gourmet potatoes, and buy them. This new demand for native potatoes helps to ensure their survival, but varieties are still being lost. Yet native potatoes do have one thing in their favor: farmers like them more than other varieties.  

A note on potato varieties

The International Potato Center curates 4354 native potato varieties. Genebank.

Acknowledgments

Thanks to Ing. Raúl Ccanto, of the Grupo Yanapai, and to Ing. Willmer Pérez and Ing. Andrea Prado, both of the International Potato Center (CIP). They are writing a video script about native potatoes. I have learned a lot from them in a week of sharing and writing.  Our script writing course was generously supported by The McKnight Foundation’s Collaborative Crop Research Program (CCRP).

PAPAS NATIVAS, DELICIOSAS Y VULNERABLES

Por Jeff Bentley, 8 de septiembre del 2019

De las mucho más de 4000 variedades de papa, la gran mayoría solo viven en los Andes, una cordillera con grandes alturas (con agricultura hasta 4500 msnm) y latitudes tropicales (con poca variación de horas luz entre invierno y verano). Las variedades adaptadas a estas condiciones especiales raras veces sobreviven en otros lugares.

Las variedades nativas están en peligro de extinción, y si se desaparecen, llevarán consigo los genes que los fitomejoradores necesitarán para crear variedades aptas a un mundo cambiante.

Pero los agricultores andinos temen la extinción de la papa nativa por otras razones. Cerca de Cusco, Santiago Huarhua y Ernestina Huallpayunca, con sus hijos, nos explican que las papas nativas son mucho más ricas que las mejoradas. Las nativas son de muchos colores, hasta rojo y azul. Son harinosas y sabrosas. Don Santiago y doña Ernestina las producen solo con abono natural, que según ellos ayuda a preservar su sabor especial. Las cultivan en las alturas, en los cerros arriba de su comunidad, mientras las papas mejoradas son blancas, y se producen con fertilizante químico, en el piso del valle.

A pesar de que la familia preserva papas nativas, más producen papas mejoradas, porque es lo que el mercado demanda, para hacer papa frita. Las papas nativas tienden a ser pequeñas y no muy buenas para freír, pero perfectas para sancochar.

Don Santiago nos cuenta que cuando era un niño, había muchas variedades nativas. No se acuerda cuántas, pero ahora solo quedan cinco. Nos muestra donde guarda su papa, para semilla. Tiene tres estantes, cada uno de un metro por dos, suficiente para sembrar 1500 metros cuadrados de cada variedad; es una parcela pequeña para cada clase de papa. La sobrevivencia de estas variedades vulnerables depende de unos cuantos kilos de semilla, custodiadas por familias relativamente aisladas.

El preservar a las papas nativas será una actividad social. Nadie lo puede hacer solo. El público tendrá que aprender a apreciar estas papitas gourmet, y comprarlas. Los agricultores tendrán que tener acceso a la semilla de otros lugares cuando su papa se degenera y hay que cambiarla.

En los últimos años, los consumidores peruanos han empezado a querer a esas pequeñas papas gourmet. Esta nueva demanda para la papa nativa ayuda a asegurar su sobrevivencia, pero se siguen perdiendo variedades. Sin embargo, la mejor ficha que tienen las papas nativas es que los mismos agricultores las prefieren a las otras variedades.

Una nota sobre las variedades de papa

El Centro Internacional de la Papa conserva 4354 variedades de papa nativa. Genebank

Agradecimientos Agradezco al Ing. Raúl Ccanto, del Grupo Yanapai, y al Ing. Willmer Pérez y la Ing. Andrea Prado, ambos del Centro Internacional de la Papa (CIP). Ellos están escribiendo un guion para un video sobre las papas nativas. En una semana de convivencia y redacción he aprendido bastante de ellos.  Nuestro curso de redacción de guiones recibió el apoyo generoso del Programa Colaborativo de Investig

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