Abstract
Yields of maize, melon, cassava and cowpea as well as changes in soil chemical contents were examined under different fertilizer treatments in a mixed cropping system. The results showed that fertilizer treatments had significant effects on the yields of maize, cassava and cowpea but no significant effect on melon yield. Total nitrogen decreased in all the plots after cropping and available phosphorus reduced from initial value of 4.72 mg/kg to between 3.37 mg/kg where no fertilizer was added and 3.83 mg/kg under inorganic fertilizer. Exchangeable potassium decreased in all the plots irrespective of fertilizer type and the changes ranged between 25% under organic fertilizer and 53% under inorganic fertilizer treatment. The level of organic carbon decreased by about 17% under organic fertilizer but by 59% where inorganic fertilizer was applied. Calcium (Ca) and magnesium (Mg) increased by 21% and 20%, respectively with the application of organic fertilizer. Though yields of crops increased with application of inorganic fertilizer, organic fertilizer and combination of both in this experiment, changes in soil nutrients status after cropping showed that the fertilizer rates used might not be able to sustain soil fertility under the system.
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Claims 16
Claim · model-written summary
Fertilizer treatments had a significant effect on maize yield
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined under different fertilizer treatments in a mixed cropping system”
e1“fertilizer treatments had significant effects on the yields of maize, cassava and cowpea”
Claim · model-written summary
Fertilizer treatments had a significant effect on cassava yield
- Taxon
- cassava
Manihot esculentae1 - Treatment
- fertilizer treatmentse1
- Outcome
- yieldse1
- Setting
- mixed cropping systeme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined under different fertilizer treatments in a mixed cropping system”
e1“fertilizer treatments had significant effects on the yields of maize, cassava and cowpea”
Claim · model-written summary
Fertilizer treatments had a significant effect on cowpea yield
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- fertilizer treatmentse1
- Outcome
- yieldse1
- Setting
- mixed cropping systeme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“examined under different fertilizer treatments in a mixed cropping system”
e1“fertilizer treatments had significant effects on the yields of maize, cassava and cowpea”
Claim · model-written summary
Fertilizer treatments had no significant effect on melon yield
- Taxon
- melon
.jpg?width=60)
Cucumis meloe2 - Treatment
- fertilizer treatmentse1
- Outcome
- melon yielde2
- Setting
- mixed cropping systeme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“examined under different fertilizer treatments in a mixed cropping system”
e1“fertilizer treatments had significant effects on the yields of maize, cassava and cowpea”
e2“no significant effect on melon yield”
Claim · model-written summary
Crop yields increased with inorganic, organic and combined fertilizer
- Taxon
- cropst0
- Treatment
- inorganic fertilizer, organic fertilizer and combination of bothe2
- Outcome
- yields of cropse2
- Direction
- increasede2
Not reportedComparator
Verbatim
t0“Yield performance of crops”
e2“Though yields of crops increased with application of inorganic fertilizer, organic fertilizer and combination of both in this experiment”
Claim · model-written summary
Total nitrogen decreased in all plots after cropping
Verbatim
t0“Yield performance of crops”
e3“Total nitrogen decreased in all the plots after cropping”
Claim · model-written summary
Available phosphorus fell to 3.37 mg/kg where no fertilizer was added
Verbatim
t0“Yield performance of crops”
e4“available phosphorus reduced from initial value of 4.72 mg/kg to between 3.37 mg/kg where no fertilizer was added and 3.83 mg/kg under inorganic fertilizer”
Claim · model-written summary
Available phosphorus fell to 3.83 mg/kg under inorganic fertilizer
Verbatim
t0“Yield performance of crops”
e4“available phosphorus reduced from initial value of 4.72 mg/kg to between 3.37 mg/kg where no fertilizer was added and 3.83 mg/kg under inorganic fertilizer”
Claim · model-written summary
Exchangeable potassium decreased in all plots irrespective of fertilizer type
Verbatim
t0“Yield performance of crops”
e5“Exchangeable potassium decreased in all the plots irrespective of fertilizer type and the changes ranged between 25% under organic fertilizer and 53% under inorganic fertilizer treatment”
Claim · model-written summary
Exchangeable potassium decreased by 25% under organic fertilizer
Verbatim
t0“Yield performance of crops”
e5“Exchangeable potassium decreased in all the plots irrespective of fertilizer type and the changes ranged between 25% under organic fertilizer and 53% under inorganic fertilizer treatment”
Claim · model-written summary
Exchangeable potassium decreased by 53% under inorganic fertilizer treatment
Verbatim
t0“Yield performance of crops”
e5“Exchangeable potassium decreased in all the plots irrespective of fertilizer type and the changes ranged between 25% under organic fertilizer and 53% under inorganic fertilizer treatment”
Claim · model-written summary
Organic carbon decreased by about 17% under organic fertilizer
Verbatim
t0“Yield performance of crops”
e6“The level of organic carbon decreased by about 17% under organic fertilizer but by 59% where inorganic fertilizer was applied”
Claim · model-written summary
Organic carbon decreased by 59% where inorganic fertilizer was applied
Verbatim
t0“Yield performance of crops”
e6“The level of organic carbon decreased by about 17% under organic fertilizer but by 59% where inorganic fertilizer was applied”
Claim · model-written summary
Calcium increased by 21% with organic fertilizer
Verbatim
t0“Yield performance of crops”
e7“Calcium (Ca) and magnesium (Mg) increased by 21% and 20%, respectively with the application of organic fertilizer”
Claim · model-written summary
Magnesium increased by 20% with organic fertilizer
Verbatim
t0“Yield performance of crops”
e7“Calcium (Ca) and magnesium (Mg) increased by 21% and 20%, respectively with the application of organic fertilizer”
Claim · model-written summary
The fertilizer rates used might not be able to sustain soil fertility under the system
Verbatim
t0“Yield performance of crops”
e2“the fertilizer rates used might not be able to sustain soil fertility under the system”
The same questions in other papers
fertilization · yield · Cucumis melo (muskmelon)Results differ
22 papers in the same direction as this paper · 72 in the opposite direction
- positive
- positive
- positive
91 papers more in this group
See all 95 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.