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Topsoil
by earthworms in it
Fertility increases the production of eggs, and if the fertility in a woman is higher, than there is a higher chance of an egg getting hit by a sperm cell, as there will be more of them.
Fertility of women in their early twenties is much higher than those in their thirties.
Subsoil has less nutrient both SOM or mineral fertilizer more accumulate on top soil. In certain climate condition (arid and semi arid) the evaporation is higher than precipitation can take up soil mineral and reached the subsoil. So, the pH can be alkaline soil which is not favourable for plat growth.
Fertility rate is low among non-aboriginal woman (1.5) , but higher among American Indian woman (2.9).
Both scientists' conclusions could be valid
One key difference is access to family planning services. In the US, individuals have better access to contraceptives and family planning information, leading to lower fertility rates. In contrast, in many parts of Africa, limited access to contraceptives and family planning education contributes to higher fertility rates.
the stratosphere
fertility will never get higher it will always decrease depending on how often people use them or you grow crops in them. The cleanliness will increase though, less often in the winter. ~animalslover ( animalslover on howrse too)
A hypo-tonic solution contains higher concentration of solvent. When it is compared with a hyper-tonic solution.
The Clearblue Fertility Monitor is best purchased online through stores such as eBay. Larger department stores such as Walgreens and Wal-Mart charge much higher prices for this item.