declining soil fertility
she was deified by the early Romans as a fertility goddess.
the women are given fertility drugs to stimulate their ovaries.
A green manure is a crop grown mainly to improve soil fertility.
fertility treatment can seem like a lifeline to childless couples.
She was unable to conceive a child naturally and was offered fertility treatment.
E. coli only conjugate when one of the cells possesses fertility genes.
The villagers took fertility symbols into the fields to ensure a good harvest.
ecospecies A group of related ecotypes that exchange genes without loss of fertility; roughly the same as a taxonomic species.
The paddy soil probably had a long history of tillage, and furthermore it had formed gley horizon and illuvium, but its fertility was not high either.
In the populations, the fertility, colour, number and size of male cone are controlled by multigene,and the variation of these characters appear continuous.
Not only major gene’s effect on fertility but also minor gene’s effect should be considered when utilize WCG to overcome semisterile between subspecies.