Paper · 2023 · Bionatura

Effect of adding chemical and organic fertilizers and spraying seaweed extracts on NPKS concentrations and cauliflower yield

Auf Abdul Rahman Saleh; Basem Rahem Bader

13
claims
36
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by-sa

Abstract

A field experiment was carried out in the agricultural season 2021-2022 in one of the agricultural fields in the Muqdadiya, Al-Harouniya district, located 40 km northeast of the Baquba district of Diyala governorate. The agrarian soil was classified as silty clay (Soil Survey Staff, 2006). It is located at a longitude of 53° 34’ N and latitude of 56° 04° 45° S. The experiment aimed to study the effect of adding chemical and organic fertilizers and spraying seaweed extracts on NPKS concentrations and cauliflower yield. The investigation included three factors: adding organic fertilizer (buffalo waste) at three levels (0, 5 and 10)% of the terrace’s size, symbolized by M1, M2 and 3M, respectively. It was added at a depth of 0-30 cm a month before planting the seedlings in the field. The second factor was the addition of NPK compound chemical fertilizer (20:20:20) at two levels (0 and the full fertilizer recommendation is 300 kg H-1 when planted as a feed) and symbolized by 1 C and 2 C, respectively. The third factor is spraying seaweed extract with three levels (0, 2 and 4) ml L-1 illustrated by A1, A2 and according to an RCBD randomized complete block design with three replications. The experiment results showed that adding organic fertilizer (10% of the size of the terrace) led to a significant increase in the head’s weight, reaching 1.611 kg. The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .Keywords: chemical fertilization, organic fertilization, seaweed extracts, cauliflower.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-sa. Read at the source ↗

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Claims 13

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Organic fertilizer at 10% significantly increased cauliflower head weight to 1.611 kg plant-1.

Treatment
organic fertilizer (10% of the size of the terrace)e0
Outcome
weight of the heade0
Direction
increasee0
Value
1.611 kg plant-1e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1”

✓ located verbatim in the source · abstract, characters 1408–1563 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With 10% organic fertilizer, fruit sulfur concentration was 2.00 mg sulfur kg-1.

Treatment
organic fertilizer (10% of the size of the terrace)e1
Outcome
sulfur concentration in the fruitse0
Value
2.00 mg sulfur kg-1e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the sulfur concentration in the fruits was 2.00 mg sulfur kg-1”

✓ located verbatim in the source · abstract, characters 1565–1627 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With 10% organic fertilizer, leaf nitrogen concentration was 4.68%.

Treatment
organic fertilizer (10% of the size of the terrace)e1
Outcome
nitrogen concentration in the leavese0
Value
4.68%e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the nitrogen concentration in the leaves was 4.68%”

✓ located verbatim in the source · abstract, characters 1629–1679 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With 10% organic fertilizer, leaf phosphorus concentration was 25%.

Treatment
organic fertilizer (10% of the size of the terrace)e1
Outcome
phosphorous concentration in the leavese0
Value
25%e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The phosphorous concentration in the leaves was 25%”

✓ located verbatim in the source · abstract, characters 1681–1732 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With 10% organic fertilizer, leaf potassium concentration was 2.05%.

Treatment
organic fertilizer (10% of the size of the terrace)e1
Outcome
potassium concentration in the leavese0
Value
2.05%e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the potassium concentration in the leaves was 2.05%”

✓ located verbatim in the source · abstract, characters 1738–1789 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemical fertilization was reported to increase cauliflower head weight from 1.385 kg Plant-1 to 1,108 kg Plant-1.

Treatment
chemical fertilizatione0
Outcome
head weighte0
Direction
increasede0
Value
1,108 kg Plant-1e0
Qualifier
1.385 kg. Plant-1e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.”

✓ located verbatim in the source · abstract, characters 1791–1884 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemical fertilization was reported to increase fruit sulfur concentration from 2.00% to 1.53%.

Treatment
chemical fertilizatione1
Outcome
sulfur concentrations in fruitse0
Direction
increasee0
Value
1.53%e0
Qualifier
2.00%e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%”

✓ located verbatim in the source · abstract, characters 1884–1972 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Chemical fertilization was reported to increase leaf nitrogen concentration from 4.60% to 3.48%.

Treatment
chemical fertilizatione1
Outcome
nitrogen concentration in the leavese0
Value
3.48%e0
Qualifier
4.60%e0

Not reportedComparatorDirection

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the nitrogen concentration in the leaves from 4.60% to 3.48%”

✓ located verbatim in the source · abstract, characters 1977–2037 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemical fertilization was reported to increase leaf phosphorus concentration from 0.37% to 0.26%.

Treatment
chemical fertilizatione1
Outcome
phosphorous concentration in the leavese0
Direction
increasee0
Value
0.26%e0
Qualifier
0.37%e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“an increase in the phosphorous concentration in the leaves from 0.37% to 0.26%”

✓ located verbatim in the source · abstract, characters 2042–2120 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Chemical fertilization was reported to increase leaf potassium concentration from 2.78% to 2.27%.

Treatment
chemical fertilizatione1
Outcome
potassium concentration in the leavese0
Direction
increasee0
Value
2.27 %e0
Qualifier
2.78%e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“an increase in the potassium concentration in the leaves from 2.78% to 2.27 %”

✓ located verbatim in the source · abstract, characters 2125–2202 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Seaweed extract at 4 mmol. L-1 significantly increased head weight to 1.282 kg. Plant-1.

Treatment
spraying seaweed extracts at a concentration of 4 mmol. L-1e0
Outcome
head weighte0
Direction
increasee0
Value
1.282 kg. Plant-1e0

Not reportedComparator

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1”

✓ located verbatim in the source · abstract, characters 2204–2341 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With seaweed extract, leaf nitrogen concentration was reported as 803%.

Treatment
spraying seaweed extracts at a concentration of 4 mmol. L-1e1
Outcome
nitrogen concentration in leavese0
Value
803%e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“nitrogen concentration in leaves 803%”

✓ located verbatim in the source · abstract, characters 2343–2380 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

With seaweed extract, leaf potassium concentration was 2.58%.

Treatment
spraying seaweed extracts at a concentration of 4 mmol. L-1e1
Outcome
potassium concentration in leavese0
Value
2.58%e0

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

Brassica oleracea var. botrytis
Brassica oleracea var. botrytis · TaxonSusan Slater · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“potassium concentration in leaves 2.58%”

✓ located verbatim in the source · abstract, characters 2385–2424 · show in text ↑
e1

“The results of the experiment showed that the addition of organic fertilizer (10% of the size of the terrace) led to a significant increase in the weight of the head, as it reached 1.611 kg plant-1, the sulfur concentration in the fruits was 2.00 mg sulfur kg-1, the nitrogen concentration in the leaves was 4.68%. The phosphorous concentration in the leaves was 25%, and the potassium concentration in the leaves was 2.05%; chemical fertilization also increased head weight from 1.385 kg. Plant-1 to 1,108 kg Plant-1.There was an increase in each of the sulfur concentrations in fruits from 2.00% to 1.53%, in the nitrogen concentration in the leaves from 4.60% to 3.48% and an increase in the phosphorous concentration in the leaves from 0.37% to 0.26% and an increase in the potassium concentration in the leaves from 2.78% to 2.27 %, spraying seaweed extracts at a concentration of 4 mmol. L-1 led to a significant increase in head weight, which reached 1.282 kg. Plant-1, nitrogen concentration in leaves 803% and potassium concentration in leaves 2.58%.As for the triple interaction .”

✓ located verbatim in the source · abstract, characters 1366–2456 · show in text ↑
t0

“cauliflower”

✓ located verbatim in the source · title, characters 107–118 · show in text ↑

other · yield · Brassica oleracea (wild cabbage)Results differ

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496 papers: 445 positive, 51 negative or no effect

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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.