Paper · 1980 · Turrialba

Rationalising fertilizer rates for sorghum. II. Optimising the dose with relevance to the soil test values

C. S. Balasundaram; U.S. Sree Ramulu

7
claims
14
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

In field trials on a shallow red soil of Bhavanisagar, sorghum cv. CSH5 given combinations of 0-200 kg N + 0-39 kg P + 0-48 kg K; 50% N + 100% P and K were applied at sowing and the remaining N 30 days later. K had no significant effect on grain yields. Grain yields increased significantly with increase in N rate (max. yields were obtained with 176-185 kg N/ha and opt. yields with 163-171 kg N and with increase in P rate (max. yields were obtained with 22.9-24.0 kg P/ha and opt. yields with 19.0-19.6 kg P). Economic rates of fertilizer application were also calculated

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Claims 7

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

K had no significant effect on sorghum grain yield.

Taxon
sorghumSorghumt0
Treatment
Ke0
Outcome
grain yieldse0
Direction
no significant effecte0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“K had no significant effect on grain yields.”

✓ located verbatim in the source · abstract, characters 209–253 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sorghum grain yield rose significantly as N rate rose.

Taxon
sorghumSorghumt0
Treatment
N ratee0
Outcome
Grain yieldse0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“Grain yields increased significantly with increase in N rate”

✓ located verbatim in the source · abstract, characters 254–314 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Maximum sorghum grain yield occurred with 176-185 kg N/ha.

Taxon
sorghumSorghumt0
Treatment
176-185 kg N/hae0
Outcome
yieldse0
Direction
max.e0
Value
176-185 kg N/hae0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“max. yields were obtained with 176-185 kg N/ha”

✓ located verbatim in the source · abstract, characters 316–362 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Optimum sorghum grain yield occurred with 163-171 kg N.

Taxon
sorghumSorghumt0
Treatment
163-171 kg Ne0
Outcome
yieldse0
Direction
opt.e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“opt. yields with 163-171 kg N”

✓ located verbatim in the source · abstract, characters 367–396 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sorghum grain yield rose as P rate rose.

Taxon
sorghumSorghumt0
Treatment
P ratee0
Outcome
yieldse0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“with increase in P rate (max. yields were obtained with 22.9-24.0 kg P/ha and opt. yields with 19.0-19.6 kg P)”

✓ located verbatim in the source · abstract, characters 401–511 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Maximum sorghum grain yield occurred with 22.9-24.0 kg P/ha.

Taxon
sorghumSorghumt0
Treatment
22.9-24.0 kg P/hae0
Outcome
yieldse0
Direction
max.e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“max. yields were obtained with 22.9-24.0 kg P/ha”

✓ located verbatim in the source · abstract, characters 426–474 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Optimum sorghum grain yield occurred with 19.0-19.6 kg P.

Taxon
sorghumSorghumt0
Treatment
19.0-19.6 kg Pe0
Outcome
yieldse0
Direction
opt.e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“opt. yields with 19.0-19.6 kg P”

✓ located verbatim in the source · abstract, characters 479–510 · show in text ↑
t0

“sorghum”

✓ located verbatim in the source · title, characters 35–42 · show in text ↑

potassium · yield · SorghumResults differ

41 papers: 24 positive, 17 negative or no effect

16 papers in the same direction as this paper · 24 in the opposite direction

  1. positive
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  3. positive

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phosphorus · yield · SorghumResults differ

105 papers: 92 positive, 13 negative or no effect

91 papers in the same direction as this paper · 12 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

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nitrogen · yield · SorghumPositive and negative results

290 papers: 264 positive, 26 negative or no effect

263 papers in the same direction as this paper · 22 in the opposite direction · 4 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

286 papers more in this group

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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.