Results 351 to 360 of about 943,403 (393)
SSRN Electronic Journal, 2005 Abstract This essay explores the hypothesis that some sources of family income encourage, while other sources discourage fertility because different sources of family income modify the economic opportunities parents must sacrifice to have another child, or the price of children in terms of parental time and market goods.
T. Paul Schultz, T. Paul Schultz
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Global Change Biology, 2020
Ammonia (NH3) emissions from fertilized soils to the atmosphere and the subsequent deposition to land surface exert adverse effects on biogeochemical nitrogen (N) cycling.
Ruoya Ma +9 more
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Ammonia (NH3) emissions from fertilized soils to the atmosphere and the subsequent deposition to land surface exert adverse effects on biogeochemical nitrogen (N) cycling.
Ruoya Ma +9 more
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Early Fertility and Lifetime Fertility
Family Planning Perspectives, 1980Teenage mothers are likely to have more children than those who postpone childbearing, but these differences are not as great as they used to be. There is also a pattern of convergence between black women and white women.
Sara R. Millman, Gerry E. Hendershot
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Soil use and management, 2019
The added value of biochar when applied along with fertilizers, beyond that of the fertilizers themselves, has not been summarized. Focusing on direct comparisons between biochar additions (≤20 t ha−1) – separately considering the addition or not of ...
Li-zhi Ye +5 more
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The added value of biochar when applied along with fertilizers, beyond that of the fertilizers themselves, has not been summarized. Focusing on direct comparisons between biochar additions (≤20 t ha−1) – separately considering the addition or not of ...
Li-zhi Ye +5 more
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Fertility desires and fertility outcomes
Journal of the Australian Population Association, 1991Over the last 30 years Australian fertility rates have fallen more than could have been predicted from changes in the numbers of children desired by women when they first married. This paper charts changes in desired and completed fertility in Australia, matches originally desired fertility with that ultimately achieved and explores some factors which ...
Gigi Santow, Michael Bracher
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Fertility and Fertilization of Streams
Journal of the Fisheries Research Board of Canada, 1948Streams in a rather rocky and barren region in Nova Scotia were found to have almost no algae and fish except in relation to farm operations. Placing of bags of chemical fertilizer along the shore was followed in a year or two by increased quantities of algae and fish downstream, the maximum effect only 150 yards away. It is concluded that fertilizing
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Fertility and Research on Fertility in Japan
The Milbank Memorial Fund Quarterly, 1956F the trends in the fertility of the Japanese in the years from 1920 to 1950 are viewed in broad perspective, the downward movement is quite comprehensible to those who have studied the dynamics of fertility in Western countries.1 In 1920 and 1925 fertility was higher in agricultural than in industrial prefectures, higher in villages than in cities ...
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2012
Fertilization-the fusion of gametes to produce a new organism-is the culmination of a multitude of intricately regulated cellular processes. In Caenorhabditis elegans, fertilization is highly efficient. Sperm become fertilization competent after undergoing a maturation process during which they become motile, and the plasma membrane protein composition
Matthew R, Marcello +2 more
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Fertilization-the fusion of gametes to produce a new organism-is the culmination of a multitude of intricately regulated cellular processes. In Caenorhabditis elegans, fertilization is highly efficient. Sperm become fertilization competent after undergoing a maturation process during which they become motile, and the plasma membrane protein composition
Matthew R, Marcello +2 more
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Slow release fertilizer hydrogels: a review
Polymer Chemistry, 2019Slow release fertilizer hydrogels combine fertilizer and hydrogel into one system.
R. Ramli
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Fertilizer Applications for Correcting Micronutrient Deficiencies
Micronutrients in Agriculture, 2018Increases in crop yields from application of B, Cu, Fe, Mn, Mo, and/or Zn occur in many parts of the world including numerous regions of the USA. There is growing awareness that micronutrient deficiencies may limit crop yields even though exceedingly ...
D. C. Martens, D. Westermann
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