Abstract
Abstract Slope position and aspect are known to influence soil temperature and moisture which have a direct bearing on yield of agronomic crops. The objectives of this study were to determine the influence of soil slope on yield and N 2 fixation by dry peas ( Pisum sativum L.) in the field and to determine the effectiveness of isolates of Rhizobium leguminosarum taken from various slopes on N 2 fixation by peas in the greenhouse. From N 2 (C 2 H 2 )‐fixation rates conducted weekly in three positions of a Palouse catena; bottomland (Xeric Argialbolls) south slope, (Ultic Argixerolls), and ridgetop (Pachic Haploxerolls), total seasonal N 2 (C 2 H 2 ) fixed was estimated at 69, 22, and 17 kg/ha of N, respectively. For peas growing on the bottomland, south slope and ridgetop, plant N uptake was 210, 99, and 75 kg/ha of N, respectively. Pea seed yields of 2,106, and 480 kg/ha on the bottomland and ridgetop, respectively, were related to the amount of water depleted in the soil profile of 21.6 and 8.9 cm, respectively. Higher yield and greater N 2 fixation by peas growing on the bottom slope were apparently related to greater root penetration and removal of water. Greater plant N and dry matter were obtained in the greenhouse when peas were inoculated with isolates from the north slope when compared with isolates from other slopes. No differences were noted in pea growth and N 2 fixation between isolates from the bottomland, south slope and ridgetop, which suggested that differences in N 2 fixation and yield observed in the field were not related to efficiency of the microsymbiot
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Claims 6
Claim · model-written summary
Seasonal nitrogen fixation in peas was estimated at 69, 22 and 17 kg/ha of N on bottomland, south slope and ridgetop, respectively.
- Taxon
- peas
Lathyrus oleraceust0 - Outcome
- total seasonal N 2 (C 2 H 2 ) fixede0
- Value
- 69, 22, and 17 kg/ha of Ne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total seasonal N 2 (C 2 H 2 ) fixed was estimated at 69, 22, and 17 kg/ha of N, respectively”
t0“Dry Peas1”
t1“Rhizobium leguminosarum”
Claim · model-written summary
Pea nitrogen uptake was 210, 99 and 75 kg/ha of N on bottomland, south slope and ridgetop.
- Taxon
- peasLathyrus oleraceuse0
- Outcome
- plant N uptakee0
- Value
- 210, 99, and 75 kg/ha of Ne0
- Setting
- bottomland, south slope and ridgetope0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For peas growing on the bottomland, south slope and ridgetop, plant N uptake was 210, 99, and 75 kg/ha of N, respectively”
Claim · model-written summary
Pea seed yield was 2,106 kg/ha on bottomland versus 480 kg/ha on ridgetop and was related to soil water depletion.
- Taxon
- PeaLathyrus oleraceuse0
- Outcome
- Pea seed yieldse0
- Value
- 2,106, and 480 kg/hae0
- Qualifier
- amount of water depleted in the soil profile of 21.6 and 8.9 cme0
- Setting
- bottomland and ridgetope0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pea seed yields of 2,106, and 480 kg/ha on the bottomland and ridgetop, respectively, were related to the amount of water depleted in the soil profile of 21.6 and 8.9 cm, respectively”
Claim · model-written summary
Higher yield and nitrogen fixation on the bottom slope were apparently related to greater root penetration and water removal.
- Taxon
- peasLathyrus oleraceuse0
- Organ / stage
- roote0
- Outcome
- Higher yield and greater N 2 fixatione0
- Direction
- Highere0
- Qualifier
- apparently related to greater root penetration and removal of watere0
- Setting
- bottom slopee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher yield and greater N 2 fixation by peas growing on the bottom slope were apparently related to greater root penetration and removal of water”
Claim · model-written summary
North-slope rhizobial isolates produced greater pea nitrogen and dry matter than isolates from other slopes.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- inoculated with isolates from the north slopee0
- Interactor
- Rhizobium leguminosarum
Rhizobium leguminosarumt1symbiont - Outcome
- plant N and dry mattere0
- Direction
- Greatere0
- Comparator
- isolates from other slopese0
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater plant N and dry matter were obtained in the greenhouse when peas were inoculated with isolates from the north slope when compared with isolates from other slopes”
t0“Dry Peas1”
t1“Rhizobium leguminosarum”
Claim · model-written summary
Pea growth and nitrogen fixation did not differ among bottomland, south-slope and ridgetop rhizobial isolates.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- isolates from the bottomland, south slope and ridgetope0
- Interactor
- Rhizobium leguminosarumRhizobium leguminosarumt1symbiont
- Outcome
- pea growth and N 2 fixatione0
- Direction
- No differencese0
- Comparator
- isolates from the bottomland, south slope and ridgetope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No differences were noted in pea growth and N 2 fixation between isolates from the bottomland, south slope and ridgetop”
t0“Dry Peas1”
t1“Rhizobium leguminosarum”
The same questions in other papers
inoculation · Rhizobium leguminosarum · Lathyrus oleraceus (pea)Results differ
10 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
13 papers more in this group
See all 17 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.