Abstract
The space between young rubber plants can be utilized for growing soybean. The aim of this study was to quantify the effectiveness of some soil ameliorants applied in combination with a reduced dosage of NPK fertilizer on soil properties and soybean yield. in a young rubber and soybean intercropped system on acid upland soil. The study was conducted in East Lampung Indonesia from April to July 2013. The plots were designed in a split-plot with three replications. The main plots were the level of NPK fertilizer recommendation dosage (100% and 75%). The subplots were soil ameliorants. The results showed that a 25% reduction of NPK did not significantly affect the soil properties and soybean yield when applied with soil ameliorants. Application of dolomite 2 t/ha and Biochar SP50 2.5 t/ha reduced soil exchangeable Al content by 25.3% and 20.8% respectively. Dolomite was the most effective to increase soil pH, whilst Biochar SP50 provided the highest soil available water pores (15.25% vol.). Soybean gave better yield when the soil was treated with dolomite, Biochar SP50, and organic fertilizer plus. Reduction in soil acidity and improvement of soil available water pores most likely were responsible factors to give better yields of soybean planted on acid soil.
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Claims 7
Claim · model-written summary
A 25% reduction of NPK fertilizer did not significantly affect soil properties or soybean yield when applied with soil ameliorants.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- 25% reduction of NPKe1
- Outcome
- soil properties and soybean yielde1
- Direction
- did not significantly affecte1
- Qualifier
- when applied with soil ameliorantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“The results showed that a 25% reduction of NPK did not significantly affect the soil properties and soybean yield when applied with soil ameliorants”
Claim · model-written summary
Dolomite at 2 t/ha reduced soil exchangeable Al content by 25.3%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Application of dolomite 2 t/hae1
- Outcome
- soil exchangeable Al contente1
- Direction
- reducede1
- Value
- 25.3%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Application of dolomite 2 t/ha and Biochar SP50 2.5 t/ha reduced soil exchangeable Al content by 25.3% and 20.8% respectively”
Claim · model-written summary
Biochar SP50 at 2.5 t/ha reduced soil exchangeable Al content by 20.8%.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Biochar SP50 2.5 t/hae1
- Outcome
- soil exchangeable Al contente1
- Direction
- reducede1
- Value
- 20.8%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Application of dolomite 2 t/ha and Biochar SP50 2.5 t/ha reduced soil exchangeable Al content by 25.3% and 20.8% respectively”
Claim · model-written summary
Dolomite was the most effective ameliorant to increase soil pH.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Dolomitee1
- Outcome
- soil pHe1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Dolomite was the most effective to increase soil pH”
Claim · model-written summary
Biochar SP50 gave the highest soil available water pores, 15.25% vol.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Biochar SP50e1
- Outcome
- soil available water porese1
- Direction
- higheste1
- Value
- 15.25% vol.e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Biochar SP50 provided the highest soil available water pores (15.25% vol.)”
Claim · model-written summary
Soybean gave better yield when the soil was treated with dolomite, Biochar SP50 and organic fertilizer plus.
- Taxon
- SoybeanGlycine maxe1
- Treatment
- dolomite, Biochar SP50, and organic fertilizer pluse1
- Outcome
- yielde1
- Direction
- bettere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Soybean gave better yield when the soil was treated with dolomite, Biochar SP50, and organic fertilizer plus”
Claim · model-written summary
Reduced soil acidity and improved soil available water pores are the probable reasons for the better soybean yields on acid soil.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- better yieldse1
- Qualifier
- Reduction in soil acidity and improvement of soil available water porese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean Yield”
e1“Reduction in soil acidity and improvement of soil available water pores most likely were responsible factors to give better yields of soybean planted on acid soil”
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