搜索结果: 1-7 共查到“农学 AIDS”相关记录7条 . 查询时间(0.046 秒)
Genetic correlations between first parity and accumulated second to last parity reproduction traits as selection aids to improve sow lifetime productivity
Breeding Swine Genetic Parameters Reproduction Traits Subsequent Reproductive Performance
2017/3/9
The objective of this research was to estimate genetic correlations between number of piglets born alive in the first parity (NBA1), litter birth weight in the first parity (LTBW1), number of piglets ...
Effects of HIV/AIDS and drought on changing cropping patterns: A case study of Zambia
HIV/AIDS crop patterns drought food security cassava maize
2011/1/12
The HIV/AIDS pandemic and changing climate patterns in southern Africa are expected to alter cropping patterns in the region. In this research, an attempt is made to measure and compare the effects of...
Cariboo Forest Region：Part 1 of 3 Vegetation Complex Stand Establlishment Decision Aids
Cariboo Forest Region Vegetation Decision Aids
2009/2/11
Over the last four years, the Early Stand Dynamics program of FORREX–Forest Research Extension Partnership has assessed the information needs of the operational silvicultural community. This process h...
Cariboo Forest Region：Part 2 of 3 Vegetation Complex Stand Establishment Decision Aids
Cariboo Forest Region Vegetation Complex
2009/2/11
Over the last four years, the Early Stand Dynamics program of FORREX–Forest Research Extension Partnership has assessed the information needs of the operational silvicultural community. This process ...
Southern Interior Forest Region（former Cariboo Forest Region）：Part 3 of 3 Vegetation Complex Stand Establishment Decision Aids
Southern Interior Forest Region Vegetation Complex Decision Aids
2009/1/9
Over the last six years, the Early Stand Dynamics program of FORREX–Forest Research Extension Partnership has assessed the information needs of the operational silvicultural community. This process ha...
Southern Interior Forest Region Forest Health Stand Establishment Decision Aids
black army cutworm black stain root disease comandra blister rust forest health harvesting insects pathogens rhizina
2009/1/9
Since 1998, the Early Stand Dynamics program of FORREX–Forest Research Extension Partnership, in collaboration with its volunteers and partners, has assessed the information needs of the operational s...
Spruce Weevil and Western Spruce Budworm Forest Health Stand Establishment Decision Aids
Choristoneura occidentalis forest health harvesting Pissodes strobi productivity silviculture
2009/1/9
Western spruce budworm (Choristoneura occidentalis) is a defoliator of Douglas-fir throughout the tree’s range in British Columbia. Although recent defoliation levels within the Coast Forest Region (c...