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共检索到78条 ,权限内显示50条;
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Continuing Survey of Food Intakes by Individuals (CSFII): One Day's Food Intake Data for Men 19-50 Years of Age, 1985 [United States];;Version 1
- 负责人:
- 关键词:
- DOI:
- doi:10.3886/icpsr21960.v1
- 摘要:
- drawn from all private households, and (2) a smaller sample of men drawn from households with reported incomes at or below 130 percent of the pover
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Data from: Oyster reefs as carbon sources and sinks
- 负责人:
- DOI:
- doi:10.5061/dryad.7nd95
- 摘要:
- on atmospheric CO2 since excavated organic material may be remineralized while shell may experience continued preservation through reburial. Thus, prote
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Agricultural and Demographic Records for Rural Households in the North, 1860: [Instructional Materials];;Archival Version
- 负责人:
- 关键词:
- DOI:
- doi:10.3886/icpsr03463
- 摘要:
- These instructional materials were prepared for use with AGRICULTURAL AND DEMOGRAPHIC RECORDS FOR HOUSEHOLDS IN THE NORTH, 1860 (ICPSR 7420
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Agricultural and Demographic Records for Rural Households in the North, 1860: [Instructional Materials];;Version 1
- 负责人:
- 关键词:
- DOI:
- doi:10.3886/icpsr03463.v1
- 摘要:
- These instructional materials were prepared for use with AGRICULTURAL AND DEMOGRAPHIC RECORDS FOR HOUSEHOLDS IN THE NORTH, 1860 (ICPSR 7420
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Data from: Enough for all: no mating effort adjustment to varying mate availability in a gift-giving spider
- 负责人:
- DOI:
- doi:10.5061/dryad.1h6r4dn
- 摘要:
- have ceased. We tested this prediction in males of the spider Pisaura mirabilis, which mate via costly nuptial gifts consisting of silk-wrapped prey
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Data from: Quantitative genetic analysis indicates natural selection on leaf phenotypes across wild tomato species (Solanum sect. Lycoper
- 负责人:
- DOI:
- doi:10.5061/dryad.116td
- 摘要:
- Adaptive evolution requires both raw genetic material and an accessible path of high fitness from one fitness peak to another. In this study, we use
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
SGS-LTER CPER Hillslope Soil Spatial Variability on the Central Plains Experimental Range, Nunn, Colorado, USA 1983-1984
- 负责人:
- Colorado State University. Libraries;;Colorado State University. Libraries
- DOI:
- doi:10.25675/10217/83515
- 摘要:
- Soil Spatial Variability - Pedons were characterized along three parallel transects, spaced at approximate 40 m intervals perpendicular to a hillslope at the CPER. Pedons
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Portrait of Fecundo Reyes holding a horse-blanket, standing to the side of a shanty barn, [s.d]
- 负责人:
- DOI:
- doi:10.25549/chs-m13792
- 摘要:
- and Antonio Reyes, can be seen from the knees up standing at center. He holds a long swaddle of material which may be either a horse-blanket or cured animal
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Data from: Can MHC-assortative partner choice promote offspring diversity? A new combination of MHC-dependent behaviors among sexes in a highly
- 负责人:
- DOI:
- doi:10.5061/dryad.1vb0h
- 摘要:
- population genetic variability. Examples of reproductive systems in which choosers (generally females) select mates depending on thei
![](http://agri.nais.net.cn/resources/front/images/source_91.jpg)
Replication data for: Adoption and diffusion of potato varieties in Peru
- 负责人:
- Pradel, Willy;;International Potato Center
- 关键词:
- DOI:
- doi:10.21223/p3/mdnli6
- 摘要:
- new genetic material. More than 34 improved varieties have been released in the country under this collaborative framework. Canchan (released in 1990