Sentence examples for fertility levels to from inspiring English sources

Responsible stewardship means farming sustainably so as to ensure the land is kept in good heart and not intensively cropped in the short-term without allowing fertility levels to replenish.

But most importantly, for fertility levels to decline, women and couples must have good means to control their fertility, in addition to motivation.

The benefits, however, are much more substantial if the migrant workers only stay in Britain for a temporary period before returning to their country of origin, since their fertility levels tend to converge with the low rates in the west and they, too, eventually become part of the ageing phenomenon.

Fertility rates in Belgium, Germany, and Switzerland began to fall in the 1880s, while in Ireland and Spain fertility levels started to decline only around the 1920s.

"The earlier distinct fertility regimes, 'developed' and 'developing,' are increasingly disappearing in global comparisons of fertility levels," according to Edward Jow-Ching Tu, a sociologist at the Hong Kong University of Science and Technology.

At farm and field scale large spatial variability in soil P fertility levels due to poor manure and fertiliser distribution was evident.

Due to their general high agricultural production potential, based on relatively high and secure water availability and high soil fertility levels compared to the surrounding uplands, these landscapes could play a pivotal role in attaining the regional objectives of food security and poverty alleviation.

Interestingly, loss of function of let-7 in Drosophila specifically affects female reproduction, while males retain fertility levels comparable to that in wild type flies [ 33].

While demographic transition theory implies that the quantum of fertility would stabilize around the replacement level of around 2.1 children per woman (e.g., Bongaarts 2002), during the last decades of the twentieth century, advanced societies witnessed low, or even the 'lowest-low' or 'ultra-low' fertility levels close to 1 (e.g., Kohler et al. 2002a, b; Frejka et al. 2010).

Male siblings of the test females generally showed fertility levels similar to what was observed in previous tests of the lines without the fru ∆tra, indicating that the UAS-fru MIR is able to overcome any dominant effects of the fru ∆tra allele (data not shown).

Women who continued their education into their 20s experienced lower fertility levels at younger ages but higher fertility at older ages, once they completed their education.