Abstract
The response, to ripping and nitrogen application, of a wheat crop which has grown after a 1 -year crop of wheat, lupins and pasture was measured in terms of tops growth, nitrogen uptake, rooting depth and grain yield. Although there were limitations to the data set used, a graphical method demonstrating separation of the effects of treatment on soil nitrogen status and nitrogen use efficiency was compared using the classical analysis of variance. Ripping increased the rate of root extension and this caused the more efficient use of fertiliser nitrogen early in the season. Compensatory nitrogen uptake took place late in the season on the unripped plots. However, grain and tops yields were significantly greater on the ripped plots. The major effect of a previous crop of lupins was to increase the nitrogen status of the plots, although early in the season the efficiency of nitrogen use was also improved. A dry finish to the season turned a statistically non-significant ripping x nitrogen x species interaction for tops growth into a significant negative interaction for grain yield.
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Claims 7
Claim · model-written summary
Ripping increased the rate of wheat root extension.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Rippinge1
- Outcome
- rate of root extensione1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e1“Ripping increased the rate of root extension and this caused the more efficient use of fertiliser nitrogen early in the season”
Claim · model-written summary
Ripping gave more efficient use of fertiliser nitrogen early in the season in wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Rippinge1
- Outcome
- use of fertiliser nitrogene1
- Direction
- more efficiente1
- Qualifier
- early in the seasone1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e1“Ripping increased the rate of root extension and this caused the more efficient use of fertiliser nitrogen early in the season”
Claim · model-written summary
Compensatory nitrogen uptake in wheat took place late in the season on unripped plots.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Compensatory nitrogen uptakee2
- Qualifier
- late in the season on the unripped plotse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e2“Compensatory nitrogen uptake took place late in the season on the unripped plots”
Claim · model-written summary
Grain and tops yields of wheat were significantly greater on ripped plots than on unripped plots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ripped plotse3
- Outcome
- grain and tops yieldse3
- Direction
- greatere3
- Comparator
- unripped plotse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e2“Compensatory nitrogen uptake took place late in the season on the unripped plots”
e3“However, grain and tops yields were significantly greater on the ripped plots”
Claim · model-written summary
A previous crop of lupins increased the nitrogen status of wheat plots.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- a previous crop of lupinse4
- Outcome
- nitrogen status of the plotse4
- Direction
- increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e4“The major effect of a previous crop of lupins was to increase the nitrogen status of the plots, although early in the season the efficiency of nitrogen use was also improved”
Claim · model-written summary
A previous crop of lupins improved nitrogen use efficiency early in the season in wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- a previous crop of lupinse4
- Outcome
- efficiency of nitrogen usee4
- Direction
- improvede4
- Qualifier
- early in the seasone4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e4“The major effect of a previous crop of lupins was to increase the nitrogen status of the plots, although early in the season the efficiency of nitrogen use was also improved”
Claim · model-written summary
A dry finish to the season turned the ripping by nitrogen by species interaction into a significant negative interaction for wheat grain yield.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain yielde5
- Qualifier
- dry finish to the seasone5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of deep ripping, the previous crop, and applied nitrogen on the growth and yield of a wheat crop”
e5“A dry finish to the season turned a statistically non-significant ripping x nitrogen x species interaction for tops growth into a significant negative interaction for grain yield”
The same questions in other papers
rotation · nutrient: content · Triticum aestivum (wheat)Positive and negative results
24 papers in the same direction as this paper · 10 in the opposite direction
- negative
- no effect
- negative
31 papers more in this group
See all 35 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.