Abstract
The short time to flower and rapid production cycle of dwarf Brassica lines make it a promising candidate as an oilseed crop for NASA's Controlled Ecological Life Support Systems (CELSS) program. Breeding lines provided by Paul H. Williams are being screened at Purdue University for productivity and yield rate using soilless culture techniques under controlled-environment conditions. The small, irregularly-shaped Brassica seeds did not respond well to conventional methods of germination above the batch hydroponic systems, even when a variety of capillary ticking materials were used. At best, attaining uniformity of seedling stands required transplants, which compromised potential yield rates in terms of mechanical damage and inhibited seedling establishment. Present emphasis is on solid substrate soilless mixtures using passive ticking hydroponics systems. Crop growth rate, harvest index, and overall yield are being compared as a function of planting densities ranging from 117 to 1423 plants/m 2 of growing area. Yield parameters are also being evaluated as a function of growth medium and level of ambient CO 2 in the growth chamber atmosphere. Research sponsored by NASA Cooperative agreement NCC 2-100.
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Claims 2
Claim · model-written summary
Small irregularly shaped Brassica seeds did not respond well to conventional germination methods above batch hydroponic systems.
- Outcome
- respond well to conventional methods of germinatione0
BrassicaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The small, irregularly-shaped Brassica seeds did not respond well to conventional methods of germination above the batch hydroponic systems”
Claim · model-written summary
Transplanting seedlings compromised potential yield rates of Brassica through mechanical damage and inhibited seedling establishment.
- Treatment
- transplantse1
- Outcome
- potential yield ratese1
- Direction
- compromisede1
- Qualifier
- in terms of mechanical damage and inhibited seedling establishmente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The small, irregularly-shaped Brassica seeds did not respond well to conventional methods of germination above the batch hydroponic systems”
e1“At best, attaining uniformity of seedling stands required transplants, which compromised potential yield rates in terms of mechanical damage and inhibited seedling establishment”
The same questions in other papers
transplanting · yield · BrassicaPositive and negative results
2 in the opposite direction
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.