Abstract
Soybeans [ Glycine max (L.) Merr.] have not responded favorably to no‐till culture on some Mississippi soils. Positional unavailability of surface‐applied fertilizers may be one reason for the poor response. A 2 X 2 X 3 factorial field experiment with five replications in a randomized complete block split‐split plot design was used to measure effects of tillage (conventional vs. no‐tillage), P and K placement (broadcast vs. injected), and P and K rates (0 and 0, 13 and 37, 40 and 112 lb/acre P and K, respectively) on soybean growth and yield from 1983 to 1985 on three soils. The soils were Okolona silty clay (fine, mont‐morillonitic, thermic Typic Chromudert) at Brooksville, Memphis silt loam (fine‐silty, siliceous, thermic Typic Hapludalf) at Raymond, and Prentiss very fine sandy loam (coarse‐loamy, siliceous, thermic Glossic Fragiudult) at Newton. All soils were initially low in P and K. Seed yields in general were lowest at Brooksville, and ranged from 16.4 to 22.4 bu/acre with a 3‐yr average of 19.4 bu/acre. Yields were much better at the two other sites, except Raymond in 1983 when seed yield averaged 16.9 bu/acre. The Raymond site had the best overall average yield of 29.2 bu/acre, while the 2‐yr average at Newton was 28.2 bu/acre. No‐tillage reduced growth and yields on the Okolona and Memphis soils. On the Prentiss soil, only growth was reduced by no‐tillage. Under no‐till conditions,injection of P and K produced greater yields than broadcast on the Okolona and Memphis soils but not on the Prentiss soil. There was little response to rate of P and K rates on either soil. The low yields on Okolona silty clay appeared to be related to variables not considered in this study.
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Claims 8
Claim · model-written summary
No-tillage reduced soybean growth and yields on the Okolona and Memphis soils.
- Taxon
- Glycine max
Glycine maxe0 - Treatment
- No‐tillagee1
- Outcome
- growth and yieldse1
- Direction
- reducede1
- Comparator
- conventionale2
- Setting
- Okolona and Memphis soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e1“No‐tillage reduced growth and yields on the Okolona and Memphis soils”
e2“effects of tillage (conventional vs. no‐tillage), P and K placement (broadcast vs. injected)”
Claim · model-written summary
No-tillage reduced soybean growth, but not yield, on the Prentiss soil.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- no‐tillagee3
- Outcome
- growthe3
- Direction
- reducede3
- Comparator
- conventionale2
- Setting
- Prentiss soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e2“effects of tillage (conventional vs. no‐tillage), P and K placement (broadcast vs. injected)”
e3“On the Prentiss soil, only growth was reduced by no‐tillage”
Claim · model-written summary
Under no-till, injected P and K produced greater soybean yields than broadcast P and K on the Okolona and Memphis soils.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- injection of P and Ke4
- Outcome
- yieldse4
- Direction
- greatere4
- Qualifier
- Under no‐till conditionse4
- Comparator
- broadcaste4
- Setting
- Okolona and Memphis soilse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e4“Under no‐till conditions,injection of P and K produced greater yields than broadcast on the Okolona and Memphis soils”
Claim · model-written summary
Under no-till, injected P and K did not produce greater soybean yields than broadcast P and K on the Prentiss soil.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- injection of P and Ke4
- Outcome
- yieldse4
- Comparator
- broadcaste4
- Setting
- Prentiss soile5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e4“Under no‐till conditions,injection of P and K produced greater yields than broadcast on the Okolona and Memphis soils”
e5“but not on the Prentiss soil”
Claim · model-written summary
P and K rate caused little soybean response on either soil.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- rate of P and Ke6
- Outcome
- responsee6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e6“There was little response to rate of P and K rates on either soil”
Claim · model-written summary
Seed yields at Brooksville were the lowest of the three sites, with a 3-year average of 19.4 bu/acre.
- Taxon
- Glycine maxGlycine maxe0
- Outcome
- Seed yieldse6
- Value
- 19.4 bu/acree7
- Setting
- Brooksvillee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e6“Seed yields in general were lowest at Brooksville”
e7“ranged from 16.4 to 22.4 bu/acre with a 3‐yr average of 19.4 bu/acre”
Claim · model-written summary
The Raymond site had the best overall average soybean yield, 29.2 bu/acre.
- Taxon
- Glycine maxGlycine maxe0
- Outcome
- overall average yielde7
- Value
- 29.2 bu/acree7
- Qualifier
- beste7
- Setting
- Raymond sitee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e7“The Raymond site had the best overall average yield of 29.2 bu/acre”
Claim · model-written summary
The 2-year average soybean yield at Newton was 28.2 bu/acre.
- Taxon
- Glycine maxGlycine maxe0
- Outcome
- averagee6
- Value
- 28.2 bu/acree6
- Setting
- Newtone6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans [ Glycine max (L.) Merr.] have not responded favorably”
e6“the 2‐yr average at Newton was 28.2 bu/acre”
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