Paper · 2020 · Journal of Plant Production

Effect of Nitrogen Fertilizer and Foliar Spraying with Humic Acid on Productivity of Maize, Soybean and Ear Rot Disease of Maize

A. M. K. Abd-Rabboh; N. A. Ghazy; M. M. Awad; et al.

10
claims
32
verbatim quotes
4
citations
2
research areas
✓
Open access · cc-by

Abstract

In the field, two experiments were confirmed in 2017 in addition to 2018 seasons at Sakha Agricultural Researches Station Farm, Agricultural Research Center, Egypt, toward investigate the influence of nitrogen levels (100, 110 and 120 kg N/fed) and spraying with humic-acid levels (without , 2.5, 5.0 and 7.5 g/L) on growth, yield and its attributes, as well ear rot disease of maize under intercropping system of maize and soybean. The field trials were executed in three replicates using split-plot design. The main-plots were consigned to nitrogen levels. The sub-plots were deal out to four levels of humic-acid as foliar spraying. Growth, yield and its attributes of both maize and soybean under intercropping system were significantly improved by rising N-levels from 100 to 110 and 120 kg N/fed and the recommended one was 120 kg N/fed which led to decrease ear rot disease infection and severity. Spraying with humic-acid (7.5 g/L) produced highest growth, yield and its attributes of both maize and soybean under intercropping system and caused more reduction in ear rot disease infection and severity. It can be recommended that the maximum growth, productivity, land equivalent ratio (LER), relative crowding coefficient (RCC), total income (LE), i.e.10588.60 and 11032 LE, respectively, economic return (LE) and lowest ear rot disease infection and severity (in maize) under intercropping system of both soybean and maize were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt.

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

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 10

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Rising nitrogen from 100 to 110 and 120 kg N/fed significantly improved growth and yield of intercropped maize and soybean.

Taxon
maize and soybeanGlycine maxZea mayse2
Treatment
rising N-levels from 100 to 110 and 120 kg N/fede2
Outcome
Growth, yield and its attributese2
Direction
improvede2
Comparator
from 100e2
Setting
Sakha Agricultural Researches Station Farme1

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“at Sakha Agricultural Researches Station Farm, Agricultural Research Center, Egypt”

✓ located verbatim in the source · abstract, characters 81–163 · show in text ↑
e2

“Growth, yield and its attributes of both maize and soybean under intercropping system were significantly improved by rising N-levels from 100 to 110 and 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 636–801 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Spraying with humic acid at 7.5 g/L produced the highest growth and yield of intercropped maize and soybean.

Taxon
maize and soybeanGlycine maxZea mayse2
Treatment
Spraying with humic-acid (7.5 g/L)e2
Outcome
growth, yield and its attributese2
Direction
higheste2
Setting
Sakha Agricultural Researches Station Farme1

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“at Sakha Agricultural Researches Station Farm, Agricultural Research Center, Egypt”

✓ located verbatim in the source · abstract, characters 81–163 · show in text ↑
e2

“Spraying with humic-acid (7.5 g/L) produced highest growth, yield and its attributes of both maize and soybean under intercropping system”

✓ located verbatim in the source · abstract, characters 905–1042 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The recommended 120 kg N/fed led to a decrease in maize ear rot infection and severity.

Taxon
maizeZea mayse3
Treatment
120 kg N/fede2
Outcome
ear rot disease infection and severitye2
Direction
decreasee2
Setting
Sakha Agricultural Researches Station Farme1

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“at Sakha Agricultural Researches Station Farm, Agricultural Research Center, Egypt”

✓ located verbatim in the source · abstract, characters 81–163 · show in text ↑
e2

“the recommended one was 120 kg N/fed which led to decrease ear rot disease infection and severity”

✓ located verbatim in the source · abstract, characters 806–903 · show in text ↑
e3

“ear rot disease of maize”

✓ located verbatim in the source · abstract, characters 359–383 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Spraying with humic acid at 7.5 g/L caused a greater reduction in maize ear rot infection and severity.

Taxon
maizeZea mayse2
Treatment
Spraying with humic-acid (7.5 g/L)e2
Outcome
ear rot disease infection and severitye3
Direction
more reductione3
Setting
Sakha Agricultural Researches Station Farme1

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“at Sakha Agricultural Researches Station Farm, Agricultural Research Center, Egypt”

✓ located verbatim in the source · abstract, characters 81–163 · show in text ↑
e2

“Spraying with humic-acid (7.5 g/L) produced highest growth, yield and its attributes of both maize and soybean under intercropping system”

✓ located verbatim in the source · abstract, characters 905–1042 · show in text ↑
e3

“caused more reduction in ear rot disease infection and severity”

✓ located verbatim in the source · abstract, characters 1047–1110 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment gave the maximum growth, productivity and land equivalent ratio of intercropped soybean and maize.

Taxon
soybean and maizeGlycine maxZea mayse3
Treatment
spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fede2
Outcome
maximum growth, productivity, land equivalent ratio (LER)e1
Direction
maximume1
Setting
Kafrelsheikh Governorate, Egypte4

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“maximum growth, productivity, land equivalent ratio (LER), relative crowding coefficient (RCC), total income (LE)”

✓ located verbatim in the source · abstract, characters 1143–1256 · show in text ↑
e2

“were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 1434–1521 · show in text ↑
e3

“under intercropping system of both soybean and maize”

✓ located verbatim in the source · abstract, characters 1381–1433 · show in text ↑
e4

“beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt”

✓ located verbatim in the source · abstract, characters 1522–1596 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment gave the maximum relative crowding coefficient of intercropped soybean and maize.

Taxon
soybean and maizeGlycine maxZea mayse3
Treatment
spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fede2
Outcome
relative crowding coefficient (RCC)e1
Direction
maximume1
Setting
Kafrelsheikh Governorate, Egypte4

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“maximum growth, productivity, land equivalent ratio (LER), relative crowding coefficient (RCC), total income (LE)”

✓ located verbatim in the source · abstract, characters 1143–1256 · show in text ↑
e2

“were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 1434–1521 · show in text ↑
e3

“under intercropping system of both soybean and maize”

✓ located verbatim in the source · abstract, characters 1381–1433 · show in text ↑
e4

“beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt”

✓ located verbatim in the source · abstract, characters 1522–1596 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment gave the maximum total income of 10588.60 and 11032 LE.

Taxon
soybean and maizeGlycine maxZea mayse3
Treatment
spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fede2
Outcome
total income (LE)e1
Direction
maximume1
Value
10588.60 and 11032 LEe5
Setting
Kafrelsheikh Governorate, Egypte4

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“maximum growth, productivity, land equivalent ratio (LER), relative crowding coefficient (RCC), total income (LE)”

✓ located verbatim in the source · abstract, characters 1143–1256 · show in text ↑
e5

“i.e.10588.60 and 11032 LE, respectively”

✓ located verbatim in the source · abstract, characters 1258–1297 · show in text ↑
e2

“were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 1434–1521 · show in text ↑
e3

“under intercropping system of both soybean and maize”

✓ located verbatim in the source · abstract, characters 1381–1433 · show in text ↑
e4

“beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt”

✓ located verbatim in the source · abstract, characters 1522–1596 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment gave the highest economic return.

Taxon
soybean and maizeGlycine maxZea mayse3
Treatment
spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fede2
Outcome
economic return (LE)e1
Direction
higherinferrede1
Setting
Kafrelsheikh Governorate, Egypte4

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“economic return (LE)”

✓ located verbatim in the source · abstract, characters 1299–1319 · show in text ↑
e2

“were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 1434–1521 · show in text ↑
e3

“under intercropping system of both soybean and maize”

✓ located verbatim in the source · abstract, characters 1381–1433 · show in text ↑
e4

“beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt”

✓ located verbatim in the source · abstract, characters 1522–1596 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The combined treatment gave the lowest ear rot infection and severity in maize.

Taxon
maizeZea mayse1
Treatment
spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fede2
Outcome
ear rot disease infection and severitye1
Direction
loweste1
Setting
Kafrelsheikh Governorate, Egypte4

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“lowest ear rot disease infection and severity (in maize)”

✓ located verbatim in the source · abstract, characters 1324–1380 · show in text ↑
e2

“were obtained from spraying with humic-acid (7.5 g/L) and fertilizing with 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 1434–1521 · show in text ↑
e4

“beneath the environmental circumstances of Kafrelsheikh Governorate, Egypt”

✓ located verbatim in the source · abstract, characters 1522–1596 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend 120 kg N/fed as the nitrogen rate for intercropped maize and soybean.

Taxon
maizeZea mayse1
Outcome
the recommended onee2
Value
120 kg N/fede2

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“ear rot disease of maize”

✓ located verbatim in the source · abstract, characters 359–383 · show in text ↑
e2

“the recommended one was 120 kg N/fed”

✓ located verbatim in the source · abstract, characters 806–842 · show in text ↑

nitrogen · disease · Zea mays (maize)Results differ

52 papers: 27 positive, 25 negative or no effect

26 papers in the same direction as this paper · 25 in the opposite direction

  1. negative
  2. negative
  3. negative

48 papers more in this group

See all 52 papers →

fertilization · disease · Zea mays (maize)Results differ

84 papers: 56 positive, 28 negative or no effect

55 papers in the same direction as this paper · 28 in the opposite direction

  1. negative
  2. negative
  3. negative
    Conventionally treated fields had more Diplodia stalk rot.

    Maize Yields and Soil Nutrient Levels With and Without Pesticides and Standard Commercial Fertilizers1 · 1980 · compared with no herbicides, insecticides, or standard commercial fertilizers

    Opposite direction

80 papers more in this group

See all 84 papers →

other · disease · Zea mays (maize)Positive and negative results

12 papers: 11 positive, 1 negative or no effect

10 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

8 papers more in this group

See all 12 papers →

application · disease · Zea mays (maize)Positive and negative results

73 papers: 60 positive, 13 negative or no effect

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

  1. negative
  2. negative
  3. negative

69 papers more in this group

See all 73 papers →

other · yield · Glycine max (soybean)Positive and negative results

87 papers: 81 positive, 6 negative or no effect

80 papers in the same direction as this paper · 6 in the opposite direction

  1. no effect
  2. negative
  3. no effect

83 papers more in this group

See all 87 papers →

other · yield · Zea mays (maize)Positive and negative results

253 papers: 221 positive, 32 negative or no effect

220 papers in the same direction as this paper · 26 in the opposite direction · 6 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

249 papers more in this group

See all 253 papers →

application · yield · Glycine max (soybean)Positive and negative results

404 papers: 332 positive, 72 negative or no effect

331 papers in the same direction as this paper · 66 in the opposite direction · 6 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

400 papers more in this group

See all 404 papers →

nitrogen · yield · Glycine max (soybean)Positive and negative results

416 papers: 318 positive, 98 negative or no effect

317 papers in the same direction as this paper · 91 in the opposite direction · 7 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

412 papers more in this group

See all 416 papers →

8 of 12 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.