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Research
4
Conservation of natural resources
3
Environmental law
2
Environmental policy
2
Environmental protection
2
Native plants for cultivation
2
Trials
2
Trials, litigation, etc
2
Agricultural conservation
1
Agricultural systems
1
Agriculture
1
Agriculture biologique
1
Bodemkunde
1
Conservation des ressources agricoles
1
Conservation des ressources naturelles
1
Diergeneeskunde
1
Law and legislation
1
Me ́decine ve ́te ́rinaire
1
National parks and reserves
1
Nature conservation
1
Organic farming
1
Parcs nationaux
1
Parks
1
Recreation
1
Soil conservation
1
Soil science
1
Soils
1
Sols
1
Syste`mes agricoles
1
Veterinary Medicine
1
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