نتایج جستجو برای: coale
تعداد نتایج: 86 فیلتر نتایج به سال:
Sugarcane (Saccharum spp.) is routinely exposed to periodic floods and highwater tables in Florida’s EvergladesAgriculturalArea. Learning sugarcane responses to these conditions will help improve yields. This study evaluated the effects of constant water-table depths, periodic floods, and N on cane and sucrose yields of two sugarcane cultivars. In 2001 and 2002, two foliar N and four water trea...
the relationship between some measure of soil P and runoff dissolved P (Gburek et al., 2000; Coale et al., The relationship between soil test P (STP) and dissolved reactive 2002; Vadas et al., 2002). However, recent research has P (DRP) in runoff has been shown to vary with soil type due to differences in soil properties. This study was conducted to determine shown that this relationship will v...
Manure water-extractable phosphorus (WEP) data are used in indices and models to assess P transport in runoff. Methods to measure WEP vary widely, often without understanding the effect on howmuch P is extracted.We conductedwater extractions on five dairy, swine, and poultry manures to assess single and sequential extractions, drying manures, solution to solid (cm g) extraction ratios, andPdete...
The relationship between STP (soil test P) and DRP (dissolved reactive P) in runoff has been shown to vary with soil type due to differences in soil properties. The purpose of this study was to determine if soil tests could indirectly take into account differences in soil properties and thus provide one relationship with STP and runoff DRP among a variety of soil types. Nine different soil type...
This article analyses the recent period changes in fertility in industrialized countries from the point of view of the varying degrees of fertility postponement at younger ages and subsequent partial recuperation at later ages. It does so through both period and cohort indicators. The outcome is that current period total fertility rates (PTFRs) are largely diverging because of differential recu...
Using bibliometric techniques, we assembled a database of over 1,100 peer-reviewed publications reporting findings dependent on longitudinal or nested studies conducted in 45 demographic surveillance sites (DSS) since 1962. This database will provide an opportunity to analyze the contribution of DSS efforts to the advancement of public health knowledge, policy, and practice in developing countr...
Recently researchers have conducted extensive investigations on China's Great Leap crisis. In this article, we critically review this literature and argue that, since the grain production collapse was not the only factor that led to the famine, the causes of these two catastrophes require separate examination. At the theoretical level multidimensional factors were responsible for the crisis. Ho...
Intercomparision of 234Th measurements in both water and particulate samples was carried out between 15 laboratories worldwide, as a part of GEOTRACES inter-calibration program. Particulate samples from four different stations namely BATS (both shallow and deep) and shelf station (shallow) in Atlantic and SAFE (both shallow and deep) and Santa Barbara station (shallow) in Pacific were used in t...
BACKGROUND Unlike other East Asian nations where preference for sons over daughters still prevails, gender preference for children in Japan has progressively shifted from son preference to a noticeable daughter preference over the past few decades. This emergence of daughter preference is surprising given that gender relations are more traditional in Japan than in other advanced countries. OBJE...
This is a study of how the synergisms between cultural and structural factors, which played a major role during the historical fertility and nuptiality transition (first demographic transition or FDT), have continued to condition demographic innovations connected to the “second demographic transition” (SDT). The continuity or discontinuity from the “first” to the “second” demographic transition...
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