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

Nom du projet qui a facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Preventing and Remediating degradation of soils in Europe through Land Care (EU-RECARE )

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

Provincie Gelderland - Pays-Bas

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

Hoe Duurzaam - Pays-Bas

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

Ministerie van Economische Zaken - Pays-Bas

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

Vitens - Laat Water Voor Je Werken - Pays-Bas

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

Wageningen Environmental Research (Alterra) - Pays-Bas

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

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

Oui

1.5 Référence au(x) Questionnaires sur les Approches de GDT (documentées au moyen de WOCAT)

2.1 Courte description de la Technologie

Définition de la Technologie:

Grass intercropping on corn fields

2.2 Description détaillée de la Technologie

Description:

Italian rye grass is sown when the corn has grown to knee height, and has not yet developed a closed cover. The grass is plowed into the soil several months after the harvest of the corn crop.

Purpose of the Technology: The purpose of the technology is to enable a good growth of the catch crop (the grass) and to increase root biomass production after the corn is harvested. This will contribute to the organic mater content of the soil, and reduce the leaching of nitrogen and potassium. After underplowing of the grass, the nitrogen and potassium will be released to the soil and become available for the next crop.

Establishment / maintenance activities and inputs: When corn is well established (between 30-60 cm height), grass is seeded between rows. A special seeder is required. Tractor must have tires that fit between corn rows. Grass germinates, but growth is reduced as corn matures and creates shade. When corn is harvested, grass continues to grow as a winter catch-crop. Some years, grass is sprayed with fertiliser to increase mineralisation. Grass is cultivated into the soil in early spring.

Natural / human environment: Multi-functional rural area with land use for agriculture, recreation, residence and nature. Dairy agriculture in small farms for Dutch standards combined with arable cropping. High livestock density.
Undulating landscape with cover sands and clayey and loamy sediments. Podzols and cambisols developed in sandy substrate. The area also has patches of anthroposols, soils enriched in Medieval times with manure and organic residues. Phosphate and nitrogen levels in these soils are in general high.
Mean monthly temperature varies between 2 and 17°C. The long-term mean annual precipitation is between 800 and 825 mm, with the lowest amounts in spring, and the highest in autumn. The long-term average annual precipitation deficit is between 200 and 240 mm.

2.3 Photos de la Technologie

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

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a moins de 10 ans (récemment)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• grâce à l'innovation d'exploitants des terres

Commentaires (type de projet, etc.) :

The land users's initiative was through the application for the project Healthy Sand by a group of farmers. During the Gezond Zand Project the group organised themselves in the Foundation HOEDuurzaam. The project ran from 2012-2014 and is followed by the new project BodemRijk.
The external initiative was from the drinking water company Vitens and the Province of Gelderland in the same period.

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

Commentaires:

Major land use problems (compiler’s opinion): The main soil threat in the Olden-Eibergen Case Study area is the gradual decline of soil organic matter stocks. On average, agricultural fields have lost up till 5.4% of organic matter in the last 10 years according to farmers. This threatens the agricultural potential of the soil as well as its water holding capacity, and its potential to buffer leaching of nutrients and pesticides. In the long term, agricultural productivity will fall, costs of agricultural inputs such as manure, fertilizers, pesticides and irrigation will increase and the additional costs for cleaning drinking water withdrawn from ground water will rise.

Major land use problems (land users’ perception): The group of farmers in the area experience declining crop production, problems with too dry and too wet soils, and decreasing organic matter content in soil due to long-term monocultures of maize, the use of pig manure and legislation forcing farmers to process or export manure from their farms.

Grazingland comments: Nothing filled in in this section, since the technology applies specifically to maize cropping.

Type of grazing system comments: Nothing filled in in this section, since the technology applies specifically to maize cropping.

3.4 Approvisionnement en eau

Commentaires:

Water supply: rainfed, mixed rainfed - irrigated

3.5 Groupe de GDT auquel appartient la Technologie

• Intercropping

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Main measures: agronomic measures

Type of agronomic measures: cover cropping, green manure, rotations / fallows

Type of vegetative measures: aligned: -linear

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main type of degradation addressed: Cn: fertility decline and reduced organic matter content

Secondary types of degradation addressed: Pc: compaction, Hq: decline of groundwater quality

Main causes of degradation: soil management (ploughing for renewal of grassland or rotation to arable cropping), governance / institutional (Stricter manure legislation since January 2014 deriving from the EU Nitrates Directive has forced farmers to process part of the manure from their farms on-farm, or to export it from their farms.)

Secondary causes of degradation: crop management (annual, perennial, tree/shrub) (long-term monoculture of maize and intensive cropping of seed potatoes)

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
• réduire la dégradation des terres

Commentaires:

Main goals: mitigation / reduction of land degradation

Secondary goals: prevention of land degradation

4.1 Dessin technique de la Technologie

4.2 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

Euro

Indiquez le taux de change des USD en devise locale, le cas échéant (p.ex. 1 USD = 79.9 réal brésilien): 1 USD = :

0,94

4.3 Activités de mise en place/ d'établissement

	Activité	Calendrier des activités (saisonnier)
1.	Buy a seeder

4.4 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Equipements	Seeder	Machine	1,0	5327,05	5327,05
Coût total de mise en place de la Technologie					5327,05
Coût total de mise en place de la Technologie en dollars américains (USD)					5667,07

Commentaires:

Duration of establishment phase: 0 month(s)
Life span of the seeder: 6 years

4.5 Activités d'entretien/ récurrentes

	Activité	Calendrier/ fréquence
1.	Seeding	After corn is established
2.	Fertilizer	Every other year

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

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Equipements	Machine use	ha	1,0	117,2	117,2	100,0
Matériel végétal	Seeds	ha	1,0	42,62	42,62	100,0
Engrais et biocides	Fertilizer Hired(machine+fert)	ha	1,0	9,06	9,06	100,0
Coût total d'entretien de la Technologie					168,88
Coût total d'entretien de la Technologie en dollars américains (USD)					179,66

Commentaires:

Machinery/ tools: Specific tractor to perform grass undersowing (seeder), tractor, sprayer/applicator

To seed the Rye-grass strips between the corn rows. Done a few months after the corn is seeded.

4.7 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

New equipment (Seeder) - The seeding and fertilizer applications are hired from a company. The company purchases the new equipment to seed between the corn rows.
The greatest determinate factor to the land users are then the cost of hired machine hours.

5.1 Climat

5.2 Topographie

Commentaires et précisions supplémentaires sur la topographie:

Altitudinal zone: 0-100 m a.s.l. (up to 45 metres a.s.l.)
Slopes on average: Flat and gentle (Only incidental)

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 depth on average: Deep (A and B horizons up till 40 cm in Gleyic Podzols and Umbric Gleysols (ca 75% of the area) Hardly any soil organic matter below 15 cm. Rooting depth is up to 80 cm) and very deep (Deep topsoils rich in organic matter in the Fimic Anthrosols (12% of the area))
Soil texture is coarse/light (Most soils have a sandy texture due to the substrate consisting of cover sands) and medium (Soils in former creek valleys contain loam (Umbric Gleysols))
Soil fertility is low (most soils have a low fertility due to the sandy substrate (specifically the Gleyic Podzols, ca 40% of the area)) or very high (in Fimic Anthrosols originated due to application of farmyard manure since medieval times (12% of the area))
Topsoil organic matter is medium-high (The purpose of the pilot project is to increase soil organic matter)
Soil drainage/infiltration is good (deep ground water table (H > 40-80 cm; L>120 cm) in the sandy soils on thick substrate of cover sands (in 65% of the area)) and medium (shallow groundwater tables in the Umbric Gleysols (35% of the area))
Soil water storage capacity is very high (in the Fimic Anthrosols with high SOM in the topsoil) and medium (in the other soils, varying with the soil organic matter content)

5.4 Disponibilité et qualité de l'eau

Commentaires et précisions supplémentaires sur la qualité et la quantité d'eau:

Ground water table is <5m (in all soil types the highest level of the groundwater table during the year is <140 cm below the soil surface. The lowest level can be lower than 120 cm)
Availability of surface water is medium (from small rivers (De Berkel) and creeks)
Water quality (untreated) is poor drinking water (treatement required - levels of the pesticides Bentazon, and MCPP in the groundwater have incidentally exceeded the norms for drinking water production between 1985 and 2009.)

5.5 Biodiversité

Commentaires et précisions supplémentaires sur la biodiversité:

Soil biodiversity is high in the Fimic Anthrosols.

5.6 Caractéristiques des exploitants des terres appliquant la Technologie

Indiquez toute autre caractéristique pertinente des exploitants des terres:

Land users applying the Technology are mainly common / average land users
Difference in the involvement of women and men: Most outdoor farm operations are completed by men.
Population density: 10-50 persons/km2
Annual population growth: negative
100% of the land users are average wealthy and own 100% of the land.
Off-farm income specification: Some farmers are contractual workers. Wives of farmers often have a job, e.g. at the municipality, craft work. No B&B activities or educational services.
Market orientation: Mixed (Maize is completely used to feed cows (max 20% of the area is allowed under maize); other arable crops are sold to the market. Dairy production is commercial.)

5.7 Superficie moyenne des terres utilisées par les exploitants des terres appliquant la Technologie

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

Propriété foncière:

• individu, avec titre de propriété

Droits d’utilisation des terres:

• loué
• individuel

Commentaires:

All agriculture land is owned or rented by individual farmers. Some farmers lease their land to other farmers. Leased land is less well managed, resulting in lower organic matter contents. Investments in SLM would lead to a higher renting fee, or the land owner taking the land back in exploitation.

5.9 Accès aux services et aux infrastructures

6.1 Impacts sur site que la Technologie a montrés

Impacts socio-économiques

Production

Disponibilité et qualité de l'eau

Revenus et coûts

Impacts socioculturels

Impacts écologiques

Cycle de l'eau/ ruissellement

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	Augmentation ou diminution	Comment la Technologie fait-elle face à cela?
températures annuelles		augmente	bien

Extrêmes climatiques (catastrophes)

Catastrophes météorologiques

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

Catastrophes climatiques

	Comment la Technologie fait-elle face à cela?
sécheresse	bien

Autres conséquences liées au climat

Autres conséquences liées au climat

	Comment la Technologie fait-elle face à cela?
réduction de la période de croissance	bien

Commentaires:

No modifications to the technology in response to climate change.

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)?

Commentaires:

Farmers are subsidized for seeding rye-grass between corn rows. If not subsidized, they are unlikely to invest. Few farmers have seen short-term benefits. Their willingness to invest is based on their understanding of the long-term benefits, brought about by the Approach developed in the Project Gezond Zand (and in RECARE).

6.5 Adoption de la Technologie

Si disponible, quantifiez (nombre de ménages et/ou superficie couverte):

20

De tous ceux qui ont adopté la Technologie, combien d'entre eux l'ont fait spontanément, à savoir sans recevoir aucune incitation matérielle, ou aucune rémunération? :

• 0-10%

Commentaires:

100% of land user families have adopted the Technology with external material support

20 land user families have adopted the Technology with external material support

6.7 Points forts/ avantages/ possibilités de la Technologie

Points forts/ avantages/ possibilités du point de vue de l'exploitant des terres
increases soil organic matter How can they be sustained / enhanced? annual application of the measure; subsidy to execute the measure
increases maize crop yield in the long term How can they be sustained / enhanced? annual application of the measure
reduces leaching of nitrogen, potassium and pesticides to the groundwater

Points forts/ avantages/ possibilités du point de vue du compilateur ou d'une autre personne ressource clé
increases soil organic matter How can they be sustained / enhanced? annual application of the measure; subsidy to execute the measure
increases available soil moisture
reduces leaching of nitrogen, potassium and pesticides to the groundwater

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

Faiblesses/ inconvénients/ risques du point de vue de l’exploitant des terres	Comment peuvent-ils être surmontés?
Uncertainty of the success or positive effect of the measure.
Uncertainty of negative effects to the crop.
Uncertainty of competition between grass and crop for nutrients and moisture.
Concerns about cost and labour
Uncertainty of hindrance from legislation.

Faiblesses/ inconvénients/ risques du point de vue du compilateur ou d'une autre personne ressource clé	Comment peuvent-ils être surmontés?
technology requires hiring of skilled labour and machinery, which is not viable without subsidy in the short term	provide subsidy in the first 3-5 years of implementation

7.1 Méthodes/ sources d'information

7.2 Références des publications disponibles

Titre, auteur, année, ISBN:

RECARE_WP3 Report: CS_11_Ouden-Eibergen_v2Annemieke Smit and Simone Verzandvoort2014

Disponible à partir d'où? Coût?

Freeannemieke.smit@wur.nl

7.3 Liens vers les informations pertinentes en ligne

Titre/ description:

Gezond Zand: Met een verbeterde bodemkwaliteit naar een betere waterkwaliteit Haarloseveld en Olden EibergenBy Willem Rienks and Henk Leever2014

URL:

Freehttp://www.hoeduurzaam.nl/images/gallery/nieuws/Brochure/BrochureHoeduurzaam%20Definitief.pdf

Titre/ description:

Unravelling changes in soil fertility of agricultural land in The NetherlandsArjan Reijneveld2013

URL:

Wageningen University Library http://library.wur.nl/WebQuery/wda/2044057