Abstract
Field studies were conducted over a 4-yr period at two locations in western Manitoba, Canada, to evaluate the effect of phosphorus (P) fertilizer management on crop growth as affected by tillage system through a 2-yr cropping sequence. In the first phase of the cropping sequence, canola (Brassica napus L.), a non-mycorrhizal crop, and spring wheat (Triticum aestivum L.), a mycorrhizal crop, were grown under conventional (CT) and reduced (RT) systems, with 0, 11 and 22 kg P ha -1 applied as monoammonium phosphate (MAP). In the second phase of the sequence, flax (Linum usitatissimum L.) was seeded following the spring wheat or canola, with application of 0 or 11 kg P ha -1 as MAP. Phosphorus application increased the early-season biomass, P concentration, and P accumulation of canola and wheat and the seed yield of canola. Tillage system had no consistent effects on growth, P concentration or uptake, or seed yields of canola or wheat, nor were P by tillage system interactions observed. Early-season biomass production and seed yields of flax were relatively unaffected by P fertilization whether applied in the same season as flax or in the previous season, although early-season P concentration and P accumulation were increased when P fertilizer was applied to the flax. Of the factors evaluated in this study, preceding crop had the greatest influence on flax growth with flax establishment, early-season biomass, and P accumulation, and seed yield all being significantly greater when flax was seeded after wheat than after canola. Key words: Crop rotation, fertilization, monoammonium phosphate, flax, wheat, canola
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Claims 10
Claim · model-written summary
Phosphorus application increased canola early biomass, phosphorus concentration and accumulation.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- Phosphorus applicatione0
- Outcome
- early-season biomass, P concentration, and P accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Phosphorus application increased the early-season biomass, P concentration, and P accumulation of canola and wheat and the seed yield of canola.”
Claim · model-written summary
Phosphorus application increased wheat early biomass, phosphorus concentration and accumulation.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Phosphorus applicatione0
- Outcome
- early-season biomass, P concentration, and P accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus application increased the early-season biomass, P concentration, and P accumulation of canola and wheat and the seed yield of canola.”
Claim · model-written summary
Phosphorus application increased canola seed yield.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Phosphorus applicatione0
- Outcome
- seed yield of canolae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus application increased the early-season biomass, P concentration, and P accumulation of canola and wheat and the seed yield of canola.”
Claim · model-written summary
Tillage had no consistent effect on canola growth, phosphorus measures or seed yield.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- Tillage systeme0
- Outcome
- growth, P concentration or uptake, or seed yieldse0
- Direction
- no consistent effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage system had no consistent effects on growth, P concentration or uptake, or seed yields of canola or wheat, nor were P by tillage system interactions observed.”
Claim · model-written summary
Tillage had no consistent effect on wheat growth, phosphorus measures or seed yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Tillage systeme0
- Outcome
- growth, P concentration or uptake, or seed yieldse0
- Direction
- no consistent effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage system had no consistent effects on growth, P concentration or uptake, or seed yields of canola or wheat, nor were P by tillage system interactions observed.”
Claim · model-written summary
There was no observed phosphorus by tillage interaction.
- Outcome
- P by tillage system interactionse0
Not reportedTaxonDirection
Verbatim
e0“nor were P by tillage system interactions observed.”
Claim · model-written summary
Current or preceding season phosphorus fertilizer relatively did not affect flax early biomass or seed yield.
- Taxon
- flax
Linum usitatissimume0 - Treatment
- P fertilizatione0
- Outcome
- Early-season biomass production and seed yieldse0
- Direction
- relatively unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early-season biomass production and seed yields of flax were relatively unaffected by P fertilization whether applied in the same season as flax or in the previous season”
Claim · model-written summary
Phosphorus fertilizer on flax increased early phosphorus concentration and accumulation.
- Taxon
- flaxLinum usitatissimume0
- Treatment
- P fertilizere0
- Outcome
- early-season P concentration and P accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early-season P concentration and P accumulation were increased when P fertilizer was applied to the flax.”
Claim · model-written summary
Flax establishment, early biomass and phosphorus accumulation were greater after wheat than canola.
- Taxon
- flaxLinum usitatissimume0
- Treatment
- seeded after wheate0
- Outcome
- flax establishment, early-season biomass, and P accumulatione0
- Direction
- greatere0
- Comparator
- after canolae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flax establishment, early-season biomass, and P accumulation, and seed yield all being significantly greater when flax was seeded after wheat than after canola.”
Claim · model-written summary
Flax seed yield was greater after wheat than canola.
- Taxon
- flaxLinum usitatissimume0
- Treatment
- seeded after wheate0
- Outcome
- seed yielde0
- Direction
- greatere0
- Comparator
- after canolae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flax establishment, early-season biomass, and P accumulation, and seed yield all being significantly greater when flax was seeded after wheat than after canola.”
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297 papers in the same direction as this paper · 1,116 in the opposite direction
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See all 1,414 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.