Abstract
Abstract This study was conducted at the University of Jordan Research Station in the central Jordan Valley during 1988 and 1989 summer growing seasons, to determine the potential and response of summer crops to intercropping system and to poultry manure addition. Corn, soybean and watermelon were grown as sole crops and as intercrops in three paired combinations (corn: watermelon, corn: soybean, watermelon: soybean) with three levels of poultry manure (0, 20, 40 t/ha). The crop yields and land equivalent ratios (LERs) were determined for all treatments. The highest yields for the two cropping systems were obtained in response to the highest poultry manure addition. Corn gave the highest yield when intercropped with soybean, where increases in yield of 45 % and 66 % were obtained over those of corn sole crop at the same level of poultry manure (40 t/ha), in 1988 and 1989 seasons, respectively. Soybean gave the highest yield when grown with corn leading to an increase of 35 % and 34 % over soybean sole crop grown at the same level of poultry manure (40 t/ha) in 1988 and 1989, respectively. Watermelon gave the highest yield when grown with soybean, giving an increase which ranged from 390 to 920 kg ha −1 over the yield of sole cropping system under the same level of poultry manure (40 t/ha). The LER values for all intercrop treatments were greater than 1.0 which gave clearly an indication for the superiority of the intercropping over the sole cropping system especially when 40 t ha −1 poultry manure was added.
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 7
Claim · model-written summary
The highest poultry manure rate produced the highest crop yields under both cropping systems.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- highest poultry manure additione0
- Outcome
- yieldse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yields for the two cropping systems were obtained in response to the highest poultry manure addition”
t0“Intercropping and Poultry Manure Effects on Yields of Corn, Watermelon and Soybean Grown in a Calcareous Soil in the Jordan Valley”
Claim · model-written summary
Corn intercropped with soybean yielded 45 % more than sole corn in 1988 at 40 t/ha manure.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- intercropped with soybeane0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 45 %e0
- Qualifier
- 1988e0
- Comparator
- corn sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn gave the highest yield when intercropped with soybean, where increases in yield of 45 % and 66 % were obtained over those of corn sole crop at the same level of poultry manure (40 t/ha), in 1988 and 1989 seasons, respectively”
Claim · model-written summary
Corn intercropped with soybean yielded 66 % more than sole corn in 1989 at 40 t/ha manure.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- intercropped with soybeane0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 66 %e0
- Qualifier
- 1989e0
- Comparator
- corn sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn gave the highest yield when intercropped with soybean, where increases in yield of 45 % and 66 % were obtained over those of corn sole crop at the same level of poultry manure (40 t/ha), in 1988 and 1989 seasons, respectively”
Claim · model-written summary
Soybean with corn yielded 35 % more than sole soybean in 1988.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- grown with corne0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 35 %e0
- Qualifier
- 1988e0
- Comparator
- soybean sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean gave the highest yield when grown with corn leading to an increase of 35 % and 34 % over soybean sole crop grown at the same level of poultry manure (40 t/ha) in 1988 and 1989, respectively”
Claim · model-written summary
Soybean with corn yielded 34 % more than sole soybean in 1989.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- grown with corne0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 34 %e0
- Qualifier
- 1989e0
- Comparator
- soybean sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean gave the highest yield when grown with corn leading to an increase of 35 % and 34 % over soybean sole crop grown at the same level of poultry manure (40 t/ha) in 1988 and 1989, respectively”
Claim · model-written summary
Watermelon with soybean yielded 390 to 920 kg ha −1 more than sole watermelon.
- Taxon
- Watermelon
Citrullus lanatuse0 - Treatment
- grown with soybeane0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 390 to 920 kg ha −1e0
- Comparator
- sole cropping systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Watermelon gave the highest yield when grown with soybean, giving an increase which ranged from 390 to 920 kg ha −1 over the yield of sole cropping system under the same level of poultry manure (40 t/ha)”
Claim · model-written summary
Every intercrop treatment had land equivalent ratio greater than 1.0.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- LER valuese0
- Direction
- greater thane0
- Value
- 1.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The LER values for all intercrop treatments were greater than 1.0”
t0“Intercropping and Poultry Manure Effects on Yields of Corn, Watermelon and Soybean Grown in a Calcareous Soil in the Jordan Valley”
The same questions in other papers
Zea mays subsp. mays · yield · Glycine max (soybean)Results differ
47 papers in the same direction as this paper · 20 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- no effect
66 papers more in this group
See all 70 papers →Glycine max · yield · Zea mays (maize)Positive and negative results
154 papers in the same direction as this paper · 18 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- no effect
- negative
176 papers more in this group
See all 180 papers →intercropping · yield · Zea mays (maize)Positive and negative results
612 papers in the same direction as this paper · 181 in the opposite direction · 40 reporting no difference from an alternative
- no effect
- no effect
- negative
830 papers more in this group
See all 834 papers →fertilization · yield · Zea mays (maize)Positive and negative results
3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative
- negative
- no effect
- negative
3,904 papers more in this group
See all 3,908 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.