31、So enzyme activity could be used as an index for evaluation of tidal flat soil fertility.
32、Former Massachusetts Gov. Mitt Romney opposes using embryos from fertility clinics.
33、the fertility rate of half the world is now 2.1 or less—the magic number that is consistent with a stable population and is usually called “the replacement rate of fertility”.
34、It is concluded that the mixed stand can be able to be self-rich in soil fertility, which benefit the maintenance and improvement of site fertility under Chinese fir plantation.
35、The wheat sheaf in Roman times was meant to ensure fertility, since it was believed that the fertility of the seeds would be transferred to the couple on whom they fell.
36、You could compare their children to those born to infertile parents to determine whether fertility was in question.
37、More recently, a relatively new procedure can preserve fertility by removing and freezing the "biological clock" itself: The ovary.
38、The Black Death of 1348 was caused by gradual loss of the humus fertility found under forest trees.
39、American fertility doctor Panayiotis Zavos said he had cloned 14 embryos and successfully transferred 11 of them.
40、Soil microorganism and soil enzyme activity is one of the most important indexes influencing the soil fertility.
41、The meaning of ISE was defined; the complexity of fertility expression of PTGMS lines, the drift of critical sterility inducing tempera tu.
42、The publicity and education and the management of family planning programme should serve the purpose of serving people's production, livelihood and fertility.
43、Planted in moderate-fertility soil and applied with nitrogenous, phosphate and potash fertilizers, summer soybean can produce higher yield and better benefit.
44、Elaborating the soil fertility condition of Kazuo county's cultivated land and the change from those of the second general survey of soil;
45、By 2030, according to United Nations projections, the total fertility rate in sub-Saharan Africa could fall to three. By 2050 it could be below 2.5.
46、The birth rate and natural growth rate decreased from 33.43‰ and 25.83‰ in 1970 to 15.23‰ and 8.77‰ in 1999 respectively. The total fertility rate went below the replacement level, making China one of the countries with a low fertility level in the wo
47、This can be done by applying more fertilizer on the upper slopes and less fertilizer on the lower slopes so that the fertility gradient of the soil is reduced or overshadowed.
