筛选
科学数据
统计数据
共检索到44条 ,权限内显示50条;
Current Population Survey, December 2008: Food Security Supplement;;Version 1
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr29645.v1
- 摘要：
- only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent estimates for (1) States; (2) Origin, Sex, and Age
Current Population Survey, December 2006: Food Security Supplement;;Version 1
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr21962.v1
- 摘要：
- only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent estimates for (1) States; (2) Origin, Sex, and Age
Current Population Survey, December 2010: Food Security Supplement;;Version 1
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr32241.v1
- 摘要：
- only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent estimates for (1) States; (2) Origin, Sex, and Age
Current Population Survey, December 2010: Food Security Supplement;;Archival Version
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr32241
- 摘要：
- only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent estimates for (1) States; (2) Origin, Sex, and Age
Current Population Survey, December 2004: Food Security Supplement;;Version 2
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr04369.v2
- 摘要：
- ).; Outgoing Rotation Weight -- PWORWGT -- Used for tallying information collected only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for mos
Current Population Survey, December 2004: Food Security Supplement;;Archival Version
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr04369
- 摘要：
- ).; Outgoing Rotation Weight -- PWORWGT -- Used for tallying information collected only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for mos
Data from: Legacy effects of diversity in space and time driven by winter cover crop biomass and nitrogen concentration
- 负责人：
- Barel, Janna
- 关键词：
- crop rotation soil organic matter soil mineral nitrogen plant-feeding nematodes plant-soil feedback plant productivity agroecology winter cover crops agriculture plant diversity
- DOI：
- doi:10.5061/dryad.sp21b
- 摘要：
- consideration of plant species choice in mixtures and rotations for optimal employment of beneficial legacy effects.
Data from: Landscape variation in tree regeneration and snag fall drive fuel loads in 25-yr old post-fire lodgepole pine forests
- 负责人：
- 关键词：
- forest fuels;reburn;Pinus contorta var. latifolia;forest stand structure;young forest;Forest Ecology
- DOI：
- doi:10.5061/dryad.3b15s
- 摘要：
- associated with high-severity surface fire potential, and 63% exceed levels associated with active crown fire potential. Fire rotations in Yellowstone Nati
Current Population Survey, December 2003: Food Security Supplement;;Version 2
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr04168.v2
- 摘要：
- d for tallying information collected only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent esti
Current Population Survey, December 2003: Food Security Supplement;;Archival Version
- 负责人：
- 关键词：
- DOI：
- doi:10.3886/icpsr04168
- 摘要：
- d for tallying information collected only in outgoing rotations.; Final Weight -- PWSSWGT -- Used for most tabulations, controlled to independent esti
