Lorsque son père prend sa retraite, en 1990, Jean Bernard, alors âgé de 33 ans, transmet son élevage de volailles à sa nièce (qu’il transformait et vendait en vente directe) pour reprendre la ferme familiale.
Les doutes quant à la viabilité économique de la ferme émises par les conseillers de gestion ne le dissuadent pas, et le motivent à se fixer des objectifs sociaux, économiques et environnementaux, dans le sens d'un système d’agriculture davantage agroécologique. Pour commencer, ce dernier agrandit la surface cultivable pour arriver à 80 ha.
Animé par le désir de protéger l’environnement et par une appétence pour l’agronomie (étant diplômé d’un BTS en production végétale), il souhaite monter en compétences pour pouvoir être maître des décisions sur sa ferme. “Je suis pas chauffeur de tracteur c'est moi qui prend la décision j'assume mes erreurs” exprime-t-il.
Ce travail à l’échelle de l’itinéraire permet des progrès importants. Par ailleurs, le blé représente environ 50 % des assolements du groupe : des progrès sur le blé et le colza se transforment rapidement en progrès sur le système de culture. Ainsi, avec au départ un assolement constitué de Colza - Blé - Orge (+ parfois pois protéagineux), Jean Bernard transitionne rapidement à l'échelle de son système.
Ce n’est donc qu’à partir d’un deuxième temps que les agriculteurs du groupe commencent à travailler à l’échelle du système. Certains; comme Jean Bernard réfléchissent particulièrement à l’allongement des rotations et diversification des cultures (grâce aux aides Contrat Territorial d’Exploitation (CTE) puis de la PAC) :
Pour aborder les problématiques sur sa ferme, Jean-Bernard met en place une approche systémique :
"Longtemps, on a fait du maïs ici. Mais maintenant, c’est compliqué, avec les sécheresses à répétition. Donc j’ai remplacé par le sorgho, qui demande moins d’eau."
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"On a fait des petits essais de désherbage mécanique à la hersé étrille... c'est compliqué! Alors on discute avec des agriculteurs bio de Seine-Maritime qui font du lin en bio et qui arrivent à faire. Moi, je ne sais pas faire encore usage des herbes, donc c'est 1 IFT. Les pois de je ne sais pas faire non plus."
le sorgho, il est capable de supporter peu de un peu de sel, de mauvaises herbes.
Nous pouvons observer que par rapport à la moyenne des groupes Dephy, la ferme de Jean Bernard et la moyenne des fermes de son groupe et bien inférieure :
Accompagné par Yann Pivain, chargé de mission agroforesterie et biodiversité la chambre d'Agriculture de Normandie, dans la démarche de plantation des haies, l'objectif était dans ce sens de capter les effets positifs de la haie : effet coupe vent, découpage des parcelles et atténuation des impacts du dérèglement climatique. Des jeunes plans d'essences locales ont été pris à Alençon à la fois pour des raisons économiques et dans une logique de bon développement équilibré entre la partie racinaire et aérienne de l'arbre.
Son conseiller à la chambre, Bertrand Omon, renchérit lors de l'entretien: " Quand on compare résultats avec les avec les résultats centres de gestion, la marge est identique à un pôle d'agriculteurs conventionnels. (...) Parce que les deux effets principaux de la marge, ce n'est pas la conduite des cultures, c'est l'effet du prix de l'année et l'effet du millésime de l'année, c'est à dire les rendements spontanés. Et ça, c'est quelque chose sur laquelle il faut absolument insister auprès de tout le monde. La façon de conduire les cultures, sauf si on fait n'importe comment et qu'on fait pas attention, compte très peu par rapport à ces effets qui sont le prix des denrées de l'année et le millésime qui fait que c'est plus ou moins favorable une année."
Dans le sud du département, on a souffert du manque d’eau et des grosses chaleurs en juin. Le blé a mûri trop vite et les rendements ont été très moyens. Pour nous, c’est une mauvaise année. On est entre -10 et -15 % par rapport à une année moyenne.
Le lin a mal poussé du fait d’une alternance entre temps froid, sec puis chaud. Il était court quand on l’a arraché, en juillet", explique Jean-Bernard Lozier. L’humidité est ensuite nécessaire pour le "rouissage" du lin, le développement naturel des champignons qui vont permettre de décoller l’écorce de la tige, afin de faciliter l’utilisation des fibres. « Là, on a tellement d’humidité qu’on ne peut pas le ramasser, déplore l’agriculteur. Les mauvaises herbes repoussent et le lin au sol se retrouve enfoui. Ça fait quinze jours qu’on ne peut rien faire. Il risque de perdre de sa qualité."
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},
{
"name": "Fournitures diverses",
"value": 623,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
}
],
"itemStyle": {
"color": "#F28960",
"borderWidth": 1
}
},
{
"name": "Charges de structure\n47488 €",
"value": 47488,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": [
{
"name": "Carburant",
"value": 5199,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Entretien matériel",
"value": 5452,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Eau, gaz, électricité",
"value": 10,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Frais de gestion",
"value": 4652,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Fermage",
"value": 14628,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Assurances",
"value": 8009,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Autres",
"value": 9538,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
}
],
"itemStyle": {
"color": "#F5A893",
"borderWidth": 1
}
},
{
"name": "Charges de personnel\n6412 €",
"value": 6412,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": [
{
"name": "Cotisations exploitants",
"value": 6412,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
}
],
"itemStyle": {
"color": "#FDCF74",
"borderWidth": 1
}
},
{
"name": "Soldes de gestion\n84821 €",
"value": 84821,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": [
{
"name": "Prélèvements privés",
"value": 569288,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Annuité de remboursement",
"value": 14100,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "Frais financiers",
"value": 176,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
},
{
"name": "EBE total",
"value": -498743,
"label": {
"show": true,
"position": "inside",
"overflow": "break"
},
"children": []
}
],
"itemStyle": {
"color": "#F8B26D",
"borderWidth": 1
}
}
]
}
}
}
"Le propre de notre métier est de travailler avec la nature, juge Jean-Bernard Lozier. Il faut être humble par rapport au climat. À nous de nous adapter et de trouver les solutions face à ces événements. » "Tout est une affaire de compromis essayer d'avoir le moins possible un impact négatif sur la nature"
L’évaluation pour accompagner la transition des systèmes de culture : le cas d’un groupe d’agriculteurs DEPHY dans l’Eure, Bertrand Omon; Chambre d’agriculture de Normandie
https://agronomie.asso.fr/aes-11-1-10