1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

HELVETAS (Swiss Intercooperation)

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

ICIMOD International Centre for Integrated Mountain Development (ICIMOD) - Népal

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Quand les données ont-elles été compilées (sur le terrain)?

01/03/2013

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

2.1 Courte description de la Technologie

Définition de la Technologie:

Smallholder farmers can use polyhouses to produce high demand vegetables, such as tomatoes, and can earn a substantial income from even a relatively small plot of land in a short time.

2.2 Description détaillée de la Technologie

Description:

During the wet season (June–October), the monsoon rains severely limit the type of crops that can be grown in open fields and they also restrict the production of seedlings. Low-cost polyhouses can be used to protect crops from excessive rainfall and can provide a sheltered environment for the production of better quality crops over the rainy season cropping period. For example, smallholder farmers who produce high demand vegetables such as tomatoes can earn as much as USD 350–500 from a plot of land which measures only 100 m2 in area over the short time period from June to November. This is much more than they can earn by growing any traditional crop by conventional methods. The Sustainable Soil Management Programme (SSMP) is promoting this technology in several mid-hill districts of Nepal.

Establishment / maintenance activities and inputs: Polyhouses should be situated in well-drained areas where sunshine is abundant and there is no shade throughout the cropping period. The bamboo frame can be constructed earlier in the year but the plastic roofing is not added until after one or two rainfall events. The height of the polyhouse frame varies depending on the altitude. At higher elevations, the polyhouses are lower to help trap more heat and moisture, whereas at lower elevations the polyhouses are higher to allow more air to circulate and moisture to evaporate. The preparations, which take place mid-May to early June, consist of fertilizing the soil and planting the tomato seedlings. Throughout the growing season the tomato plants are staked, trained, and pruned and a top dressing of fertilizer is added to produce a higher quality product.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• par le biais de projets/ d'interventions extérieures

3.1 Principal(aux) objectif(s) de la Technologie

• améliorer la production
• créer un impact économique positif

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): In the mid-hills of Nepal, the arable land of most farm households has been divided into very small plots. If this land is used to produce traditional crops such as maize, wheat, and millet using conventional farming methods, it cannot provide full employment for all of the householders and cannot yield sufficient cash income for the household. The risk of intense rainfall during the monsoon season, which can damage crops, has prevented these farmers from switching to more lucrative high value crops.

3.3 Informations complémentaires sur l'utilisation des terres

Nombre de période de croissance par an: :

• 1

Précisez:

Longest growing period in days: 214; Longest growing period from month to month: May to November

3.4 Groupe de GDT auquel appartient la Technologie

• Greenhouses

3.5 Diffusion de la Technologie

Spécifiez la diffusion de la Technologie:

• répartie uniformément sur une zone

Si la Technologie est uniformément répartie sur une zone, indiquez la superficie couverte approximative:

• 1-10 km2

3.6 Mesures de GDT constituant la Technologie

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main causes of degradation: Heavy / extreme rainfall (intensity/amounts) (During the summer monsoon (June-October), continuous or heavy rainfall can damage seedlings and erode the land; it is difficult to establish crops during this time.)

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Spécifiez l'objectif de la Technologie au regard de la dégradation des terres:

• prévenir la dégradation des terres

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

Left: Sketch of a polyhouse. The optimum length is 20 m and the width 5 m. The height of the central and side poles varies depending on the elevation. Note that there should be a space of at least 1 m between polyhouses.

Right top: Cross sectional view of a planting bed showing row-to-row (RXR) and plant-to-plant (PXP) distances. Note that there should be a space of at least 90 cm between beds.

Right bottom: Inside the polyhouse, the tomatoes can be staked using bamboo poles; the plants are trained along these trellises.

Technical knowledge required for land users: moderate

Main technical functions: Increase Productivity, Introduce high value crop

Secondary technical functions: increase in nutrient availability (supply, recycling,…)

4.3 Informations générales sur le calcul des intrants et des coûts

Spécifiez la manière dont les coûts et les intrants ont été calculés:

• par entité de la Technologie

Indiquez la monnaie utilisée pour le calcul des coûts:

• dollars US

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Labour for construction of the Polyhouse	Structurel
2.	Labour for planting, training,pruning,stalking	Agronomique
3.	Materials: Bamboo pole, plastics sheet, rope, nails, seed, poles
4.	Agricultural: seed, fertilizer, crop protection	Agronomique

Commentaires:

Details for the establishment of Poly house. Establishment activities 1. Construction of the polyhouse using bamboo poles, wooden posts, clear plastic sheet, nails, and rope. 2. How long it takes to construct the polyhouse and plant the crops depends on how much labour is available. Depending on their level of expertise, four to five people can construct the structure in one day; and two people can complete the soil preparation and planting in one day. Technical guidelines for erecting a polyhouse The optimum length of a polyhouse is 20 m, and the width is 5 m; 400–500 gauge plastic sheeting is used. The height of the polyhouse depends on the elevation: at 1200–1600 masl, the optimum height of the central pole is 3 m and the side poles are 2 m high; at 1600–2000 masl, the central pole is 2.5 m high and the side poles are 1.6 m high. There should be an open space of at least 1 m between polyhouses. Technical guidelines for preparing the soil and planting tomatoes Per plant, at least 3–4 kg of well-decomposed farmyard manure and compost are worked into the soil. Before transplanting the seedlings, the soil around each is dressed with 10 g of DAP (diammonium phosphate) and 6 g of MoP (muriate of potash). The seedlings are transplanted when they are 20–25 days old. In an open row system, the suggested row to row (RxR) spacing is 90 cm and the suggested plant to plant (PxP) spacing is 60 cm; in a closed row system the row to row and plant to plant spacing can both be 60 cm. At least two top dressings of DAP and MoP (10:10 g) are necessary 20–25 and 40–45 days after transplanting; 1 kg per 0.05 ha of borax is also added at the time of the first top dressing. Alternatively, these two top dressings can be substituted by a mixture of cattle urine (50 ml) and water (200 ml water) per plant. The dressing with this mixture can begin 20–25 days after transplanting, and is repeated every 10–12 days.

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% du coût supporté par les exploitants des terres
Main d'œuvre	Construction of the polyhouse	persons/unit	5,0	4,0	20,0	100,0
Main d'œuvre	Training, pruning, stalking	persons/unit	5,0	4,0	20,0	100,0
Matériel végétal	Seed, fertilizer, crop protection	unit	1,0	10,0	10,0	50,0
Matériaux de construction	Bamboo pole, plastics sheet, rope, nails, seed, poles	unit	1,0	90,0	90,0	35,0
Coût total de mise en place de la Technologie					140,0

4.6 Activités d'entretien/ récurrentes

	Activité	Type de mesures	Calendrier/ fréquence
1.	There are no major maintenance costs during the cropping season; but occasionally some minor maintenance is required (e.g., replacing damaged stakes and plastic sheet, or securing with additional rope and nails).	Agronomique

4.7 Coûts et intrants nécessaires aux activités d'entretien/ récurrentes (par an)

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% du coût supporté par les exploitants des terres
Main d'œuvre	Maintenance	persons/unit	1,0	5,0	5,0	100,0
Equipements	Equipment	unit	1,0	5,0	5,0	100,0
Engrais et biocides	Agricultural	unit	1,0	5,0	5,0	100,0
Matériaux de construction	Material	unit	1,0	10,0	10,0	100,0
Coût total d'entretien de la Technologie					25,0

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

All costs and amounts are rough estimates by the technicians and authors. Exchange rate USD 1 = NPR 71 in April 2011

5.1 Climat

5.2 Topographie

Commentaires et précisions supplémentaires sur la topographie:

Slopes on average: Also moderate (6-10%), rolling (11-15%) and hilly (16-30%)

Landforms: Also footslopes

5.3 Sols

Si disponible, joignez une description complète du sol ou précisez les informations disponibles, par ex., type de sol, pH/ acidité du sol, capacité d'échange cationique, azote, salinité, etc.

Soil fertility is medium - high

Soil water storage capacity is medium - high

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

5.7 Superficie moyenne des terres détenues ou louées par les exploitants appliquant la Technologie

5.8 Propriété foncière, droits d’utilisation des terres et de l'eau

Propriété foncière:

• individu, sans titre de propriété
• individu, avec titre de propriété

Droits d’utilisation des terres:

• individuel

Droits d’utilisation de l’eau:

• communautaire (organisé)

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Revenus et coûts

Autres impacts socio-économiques

Impacts socioculturels

Impacts écologiques

Sols

Biodiversité: végétale, animale

Réduction des risques de catastrophe et des risques climatiques

6.2 Impacts hors site que la Technologie a montrés

6.3 Exposition et sensibilité de la Technologie aux changements progressifs et aux évènements extrêmes/catastrophes liés au climat (telles que perçues par les exploitants des terres)

Changements climatiques progressifs

Changements climatiques progressifs

	Saison	Type de changements/ extrêmes climatiques	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	pas bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

	Comment la Technologie fait-elle face à cela?
pluie torrentielle locale	bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
High relative humidity	pas bien

Commentaires:

optimize the plant density; train and prune plants often to avoid overcrowding; modify the structure to provide more ventilation (ventilated polyhouse) in especially hot areas

6.4 Analyse coûts-bénéfices

Quels sont les bénéfices comparativement aux coûts de mise en place (du point de vue des exploitants des terres)?

Quels sont les bénéfices comparativement aux coûts d'entretien récurrents (du point de vue des exploitants des terres)?

6.5 Adoption de la Technologie

Commentaires:

There is a moderate trend towards spontaneous adoption of the Technology

Comments on adoption trend: Although the technology is only moderately expensive to implement and provides a higher rate of return than traditional crops, smallholder farmers often need technical support and encouragement to get started. This support can be in the form of improved seed varieties and plastic sheeting for the polyhouse.

Driver for adoption:
• relatively simple technology
• higher economic return
• provides on-farm employment
Constraints
• smallholder farmers and poorer households need initial support to establish the polyhouse
• farmers need technical support
• farmers need practical information and technical backstopping

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
Cost effective in terms of output as compared to traditional crops How can they be sustained / enhanced? Identify other cash crops that can also provide improved income opportunities
This technology can be integrated to make maximum use of farm niches; it is especially beneficial for smallholder farmers How can they be sustained / enhanced? Provide training on the construction of polyhouses to experienced lead farmers so that they can provide technical support to others.
It mostly uses local materials How can they be sustained / enhanced? Ensure bamboo poles are available on the farm; encourage the use of silpaulin which is more durable than polyethylene
Uses local expertise, farmer knowledge, and practices How can they be sustained / enhanced? Farmers can make the most of their investment by linking with markets and by providing support for value chain development.

6.8 Faiblesses/ inconvénients/ risques de la Technologie et moyens de les surmonter

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
Need to provide training and technical know-how and need on-farm research to identify alternative cash crops	Farmer-to-famer extension can help to identify other crops
Vulnerable to diseases and pests	Adjust planting time to local conditions; build the polyhouses in appropriate locations; plant resistant varieties; modify the structure to improve air circulation; prune and train plants throughout the cropping season; improve staking techniques; rotate crops or move polyhouse every three years
Some initial set-up cost	Silpaulin can be purchased at lower cost when farmers' groups buy in bulk.

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

Construction of polyhouse and rainy season tomato cultivation inside polyhouse (in Nepali). Kathmandu, Nepal: Sustainable Soil Management Programme, Helvetas Nepal, SSMP (2010)