Abstract
Abstract Spring wheat producers in central and north central Montana are lacking information to interpret the Olsen phosphorus (P) soil test. This study was conducted to evaluate spring wheat P response and the Olsen P soil test. Field experiments were conducted at 29 cultivated fallow, 5 no‐till fallow, 16 no‐till recrop, and 2 cultivated recrop locations from 1986 to 1995. Phosphorus treatments ranging from 0 to 29 kg P/ha were applied on sites with Olsen P soil tests varying from 4 to 37 mg/kg. Grain yield, protein, and test weight responses were measured. Yields fluctuated from 1082 to 6270 kg/ha and P response from 0 to 1210 kg/ha. A Cate‐Nelson plot of the response data confirmed the current critical level of 16 mg/kg, but P fertilizer recommendations were adjusted. Multiple regression was utilized to develop a highly significant P response equation Y = ‐11.18 + 67.672 P ‐ 1.22 P2 ‐0.98 (P x ST), R2 = 0.55 where Y = grain yield response (kg/ha), P. = P rate (kg/ha), and ST = Olsen P soil test (mg/kg). Grain test weight and protein content were generally unaffected by P except protein was depressed at several environments with high yields and high P soil tests. Growers should use a P starter fertilizer regardless of soil test.
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Claims 8
Claim · model-written summary
Wheat grain yields ranged from 1082 to 6270 kg/ha.
- Taxon
- Spring wheat
Triticum aestivumt0 - Outcome
- Yieldse0
- Value
- 1082 to 6270 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields fluctuated from 1082 to 6270 kg/ha”
t0“Spring wheat”
Claim · model-written summary
Wheat phosphorus yield response ranged from 0 to 1210 kg/ha.
- Taxon
- Spring wheatTriticum aestivumt0
- Outcome
- P responsee0
- Value
- 0 to 1210 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P response from 0 to 1210 kg/ha”
t0“Spring wheat”
Claim · model-written summary
A Cate‐Nelson plot confirmed the 16 mg/kg Olsen P critical level.
- Taxon
- Spring wheatTriticum aestivumt0
- Outcome
- critical levele0
- Value
- 16 mg/kge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A Cate‐Nelson plot of the response data confirmed the current critical level of 16 mg/kg”
t0“Spring wheat”
Claim · model-written summary
The multiple-regression equation for wheat yield response was highly significant with R2 = 0.55.
- Taxon
- Spring wheatTriticum aestivumt0
- Outcome
- P response equatione0
- Value
- R2 = 0.55e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Multiple regression was utilized to develop a highly significant P response equation Y = ‐11.18 + 67.672 P ‐ 1.22 P2 ‐0.98 (P x ST), R2 = 0.55”
t0“Spring wheat”
Claim · model-written summary
Phosphorus generally did not affect wheat grain test weight.
- Taxon
- Spring wheatTriticum aestivumt0
- Treatment
- Pe0
- Outcome
- Grain test weighte0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain test weight and protein content were generally unaffected by P”
t0“Spring wheat”
Claim · model-written summary
Phosphorus generally did not affect wheat grain protein content.
- Taxon
- Spring wheatTriticum aestivumt0
- Treatment
- Pe0
- Outcome
- protein contente0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain test weight and protein content were generally unaffected by P”
t0“Spring wheat”
Claim · model-written summary
Phosphorus depressed wheat protein at several high-yield, high-soil-P environments.
- Taxon
- Spring wheatTriticum aestivumt0
- Outcome
- proteine0
- Direction
- depressede0
- Setting
- environments with high yields and high P soil testse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protein was depressed at several environments with high yields and high P soil tests”
t0“Spring wheat”
Claim · model-written summary
The authors recommend P starter fertilizer regardless of soil test.
- Taxon
- Spring wheatTriticum aestivumt0
- Outcome
- use a P starter fertilizer regardless of soil teste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growers should use a P starter fertilizer regardless of soil test”
t0“Spring wheat”
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See all 56 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.