Paper · 1968 · Experimental Agriculture

Effects of Nitrogen and Spacing on Castor Bean in Sandy Soils in Egypt

A. El-Hamidi; M. A. Moursi; S. S. Ahmed

5
claims
9
verbatim quotes
8
citations
1
research areas
—
Not open access

Abstract

Summary Castor beans grew well in sandy soils in U.A.R. where field crops had previously failed to produce good yields. Calcium nitrate up to 300 kg. per feddan resulted in increased yields of seeds and oil in a two-year experiment. Better yields were obtained by increasing the number of plants up to 3 per hill at distances of 45 cm. apart. The oil percentage and other properties were not influenced by nitrogen fertilizers or plant density.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 5

Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Castor beans grew well in sandy soils where field crops had previously yielded poorly.

Taxon
Castor beansRicinus communise0
Outcome
grew welle0
Setting
sandy soils in U.A.R.e0

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

Ricinus communis
Ricinus communis · TaxonDvellakat · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Castor beans grew well in sandy soils in U.A.R. where field crops had previously failed to produce good yields”

✓ located verbatim in the source · abstract, characters 8–118 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium nitrate up to 300 kg per feddan increased seed yield.

Taxon
Castor BeanRicinus communist0
Treatment
Calcium nitrate up to 300 kg. per feddane0
Outcome
yields of seedse0
Direction
increasede0

Not reportedComparator

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

Ricinus communis
Ricinus communis · TaxonDvellakat · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Calcium nitrate up to 300 kg. per feddan resulted in increased yields of seeds and oil in a two-year experiment”

✓ located verbatim in the source · abstract, characters 120–231 · show in text ↑
t0

“Castor Bean”

✓ located verbatim in the source · title, characters 35–46 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Calcium nitrate up to 300 kg per feddan increased oil yield.

Taxon
Castor BeanRicinus communist0
Treatment
Calcium nitrate up to 300 kg. per feddane0
Outcome
oile0
Direction
increasede0

Not reportedComparator

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

Ricinus communis
Ricinus communis · TaxonDvellakat · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Calcium nitrate up to 300 kg. per feddan resulted in increased yields of seeds and oil in a two-year experiment”

✓ located verbatim in the source · abstract, characters 120–231 · show in text ↑
t0

“Castor Bean”

✓ located verbatim in the source · title, characters 35–46 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Up to three plants per hill at 45 cm spacing improved yield.

Taxon
Castor BeanRicinus communist0
Treatment
increasing the number of plants up to 3 per hill at distances of 45 cm. aparte0
Outcome
yieldse0
Direction
Bettere0

Not reportedComparator

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

Ricinus communis
Ricinus communis · TaxonDvellakat · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Better yields were obtained by increasing the number of plants up to 3 per hill at distances of 45 cm. apart”

✓ located verbatim in the source · abstract, characters 233–341 · show in text ↑
t0

“Castor Bean”

✓ located verbatim in the source · title, characters 35–46 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Nitrogen fertilizer and plant density did not alter oil percentage or other oil properties.

Taxon
Castor BeanRicinus communist0
Treatment
nitrogen fertilizers or plant densitye0
Outcome
oil percentage and other propertiese0
Direction
not influencede0

Not reportedComparator

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

Ricinus communis
Ricinus communis · TaxonDvellakat · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The oil percentage and other properties were not influenced by nitrogen fertilizers or plant density”

✓ located verbatim in the source · abstract, characters 343–443 · show in text ↑
t0

“Castor Bean”

✓ located verbatim in the source · title, characters 35–46 · show in text ↑

density · quality: oil · Ricinus communis (castor bean)Positive and negative results

7 papers: 4 positive, 3 negative or no effect

2 papers in the same direction as this paper · 4 in the opposite direction

  1. positive
  2. positive
  3. positive

3 papers more in this group

See all 7 papers →

fertilization · quality: oil · Ricinus communis (castor bean)Positive and negative results

13 papers: 12 positive, 1 negative or no effect

12 in the opposite direction

  1. positive
  2. positive
  3. positive

9 papers more in this group

See all 13 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.