conception, creation - the event that occurred at the beginning of something; "from its creation the plan was doomed to failure"

pollenation, pollination - transfer of pollen from the anther to the stigma of a plant

cross-fertilisation, cross-fertilization - fertilization by the union of male and female gametes from different individual of the same species

self-fertilisation, self-fertilization - fertilization by the union of male and female gametes from the same individual

superfecundation - fertilization of two or more ova released during the same menstrual cycle by sperm from separate acts of coitus (especially by different males)

superfetation - fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time; "superfetation is normal in some animal species"

enrichment - act of making fuller or more meaningful or rewarding

top dressing - a layer of fertilizer or manure not plowed in