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- rotor-vortex emulsifier 2
- rotor-vortex emulsor 1
- rotten bottom, roots and cervix 1
- roughage 1
- rought tolerance 1
- round table 1
- roundworms 6
- row spacing 3
- row spacing, 1
- row width 2
- row-spacing width 1
- royal jelly 4
- royal jelly solubility 2
- RSA 1
- RTK 1
- Rubus 1
- Rubus fructcosus 1
- Rubus L 1
- ruderants 1
- Rudmetaltorh 1