Abstract
Abstract The effects of moisture stress, brought about by increased levels of soil moisture tension, on the morphological development of greenhouse‐grown burley tobacco plants were studied during the summers of 1963 and 1964. The tobacco plants were transplanted into cans (one plant per can) containing 160 pounds (oven dry basis) of Maury silt loam. The moisture treatments were, 1, to maintain the soil near 100% of available water, and 2, 3, 4, and 5, to return the soil to field capacity when the moisture decreased to 75, 50, 25, and 0% of available water. These percent available water values correspond to tension values of 0.25, 0.42, 0.96, 3.50 and 15 atmospheres, respectively. The results show that increased soil moisture tension resulted in decreases in total leaf area development, rate of leaf area development, and total dry weight of leaves (for treatments 3, 4, and 5). Irrigation of stressed plants resulted in increased growth rates which did not exceed the normal rates of continually nonstressed plants except as the nonstressed plants approached maturity. In addition, increased moisture tension delayed maturity, decreased quality, reduced stalk weight, and increased the ratio of leaf weight to stalk weight.
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Claims 6
Claim · model-written summary
Increased soil moisture tension decreased total leaf area development, rate of leaf area development and total dry weight of leaves.
Verbatim
e0“burley tobacco plants”
e1“increased soil moisture tension resulted in decreases in total leaf area development, rate of leaf area development, and total dry weight of leaves (for treatments 3, 4, and 5)”
e2“to maintain the soil near 100% of available water”
Claim · model-written summary
Irrigation of stressed tobacco plants increased growth rates, which did not exceed those of continually nonstressed plants except near maturity.
Verbatim
e0“burley tobacco plants”
e3“Irrigation of stressed plants resulted in increased growth rates which did not exceed the normal rates of continually nonstressed plants except as the nonstressed plants approached maturity”
Claim · model-written summary
Increased moisture tension delayed maturity of burley tobacco.
Not reportedComparator
Verbatim
e0“burley tobacco plants”
e4“increased moisture tension delayed maturity, decreased quality, reduced stalk weight, and increased the ratio of leaf weight to stalk weight”
Claim · model-written summary
Increased moisture tension decreased the quality of burley tobacco.
Not reportedComparator
Verbatim
e0“burley tobacco plants”
e4“increased moisture tension delayed maturity, decreased quality, reduced stalk weight, and increased the ratio of leaf weight to stalk weight”
Claim · model-written summary
Increased moisture tension reduced stalk weight of burley tobacco.
Not reportedComparator
Verbatim
e0“burley tobacco plants”
e4“increased moisture tension delayed maturity, decreased quality, reduced stalk weight, and increased the ratio of leaf weight to stalk weight”
Claim · model-written summary
Increased moisture tension increased the ratio of leaf weight to stalk weight in burley tobacco.
- Taxon
- burley tobaccoe0
- Treatment
- increased moisture tensione4
- Outcome
- ratio of leaf weight to stalk weighte4
- Direction
- increasede4
Not reportedComparator
Verbatim
e0“burley tobacco plants”
e4“increased moisture tension delayed maturity, decreased quality, reduced stalk weight, and increased the ratio of leaf weight to stalk weight”
The same questions in other papers
soil water · growth · Nicotiana tabacum (tobacco)Positive and negative results
1 in the opposite direction
- positive
irrigation · growth · Nicotiana tabacum (tobacco)Positive and negative results
15 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- negative
17 papers more in this group
See all 21 papers →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.