Abstract
Optimized use of calcareous soil in dryland areas needs to begin with rehabilitation efforts using soil amendments, including organic fertilizer and biochar. This study sought to determine whether kinds of soil amendments and mycorrhizal biofertilizers may enhance the chemical quality of calcareous soils and increase the yield of sorghum on dry land. The study was conducted at the experimental garden of the Agricultural Extension Center located in Oelnasi Village from April to August of 2023. Two criteria included in the study were the kind of soil amendment and mycorrhizal biological fertilizer, both of which were arranged in a randomized block design. The parameters observed were soil chemical properties, plant N and P nutrient uptake, and sorghum yield. The research results showed that the application of three types of soil amendments (P1 = cow dung, P2 = rice straw compost, and P3 = corncob biochar) improved the chemical quality of calcareous soil. This application of corncob biochar could significantly reduce soil pH from 7.85 (slightly alkaline) to 7.19 (neutral) and increase soil organic C to 2.55% C, followed by treatment with cow dung and rice straw compost. Other soil chemical properties, i.e., N, P, K, and soil CEC, also improved, which differed from the control treatment. The mycorrhizal biofertilizer provided could also improve the chemical properties of calcareous soil. Providing mycorrhizal biofertilizer could increase the N and P nutrient uptake of sorghum plants by 3.79% dry weight-1 and 2.18% dry weight-1, respectively, as well as increased sorghum yields, respectively by 4.04 t ha-1, 3.97 t ha-1 and 3.87 t ha-1 dry beans, higher than the control which only achieved 2.32 t ha-1 dry beans.
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Claims 11
Claim · model-written summary
Application of cow dung, rice straw compost and corncob biochar improved the chemical quality of calcareous soil used for sorghum.
- Treatment
- three types of soil amendments (P1 = cow dung, P2 = rice straw compost, and P3 = corncob biochar)e0
- Outcome
- chemical quality of calcareous soile0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the application of three types of soil amendments (P1 = cow dung, P2 = rice straw compost, and P3 = corncob biochar) improved the chemical quality of calcareous soil”
t0“sorghum”
Claim · model-written summary
Corncob biochar significantly reduced soil pH from 7.85 to 7.19.
- Treatment
- corncob biochare0
- Outcome
- soil pHe0
- Direction
- reducee0
- Value
- 7.85 (slightly alkaline) to 7.19 (neutral)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“This application of corncob biochar could significantly reduce soil pH from 7.85 (slightly alkaline) to 7.19 (neutral)”
t0“sorghum”
Claim · model-written summary
Corncob biochar increased soil organic C to 2.55% C, followed by cow dung and rice straw compost.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“This application of corncob biochar”
e1“increase soil organic C to 2.55% C”
t0“sorghum”
Claim · model-written summary
Soil N, P and K also improved with the amendments and differed from the control treatment.
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Other soil chemical properties, i.e., N, P, K, and soil CEC, also improved, which differed from the control treatment”
t0“sorghum”
Claim · model-written summary
Soil CEC also improved with the amendments and differed from the control treatment.
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Other soil chemical properties, i.e., N, P, K, and soil CEC, also improved, which differed from the control treatment”
t0“sorghum”
Claim · model-written summary
Mycorrhizal biofertilizer improved the chemical properties of calcareous soil.
- Treatment
- mycorrhizal biofertilizere0
- Interactor
- mycorrhizal biofertilizere0symbiont
- Outcome
- chemical properties of calcareous soile0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The mycorrhizal biofertilizer provided could also improve the chemical properties of calcareous soil”
t0“sorghum”
Claim · model-written summary
Mycorrhizal biofertilizer increased nitrogen nutrient uptake of sorghum plants by 3.79% dry weight-1.
- Treatment
- mycorrhizal biofertilizere0
- Interactor
- mycorrhizal biofertilizere0symbiont
- Outcome
- N and P nutrient uptakee0
- Direction
- increasee0
- Value
- 3.79% dry weight-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Providing mycorrhizal biofertilizer could increase the N and P nutrient uptake of sorghum plants by 3.79% dry weight-1 and 2.18% dry weight-1, respectively”
Claim · model-written summary
Mycorrhizal biofertilizer increased phosphorus nutrient uptake of sorghum plants by 2.18% dry weight-1.
- Treatment
- mycorrhizal biofertilizere0
- Interactor
- mycorrhizal biofertilizere0symbiont
- Outcome
- N and P nutrient uptakee0
- Direction
- increasee0
- Value
- 2.18% dry weight-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Providing mycorrhizal biofertilizer could increase the N and P nutrient uptake of sorghum plants by 3.79% dry weight-1 and 2.18% dry weight-1, respectively”
Claim · model-written summary
Sorghum yield was increased to 4.04 t ha-1, higher than the control at 2.32 t ha-1 dry beans.
- Outcome
- sorghum yieldse0
- Direction
- highere0
- Value
- 4.04 t ha-1e0
- Qualifier
- 2.32 t ha-1 dry beanse0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“increased sorghum yields, respectively by 4.04 t ha-1, 3.97 t ha-1 and 3.87 t ha-1 dry beans, higher than the control which only achieved 2.32 t ha-1 dry beans”
Claim · model-written summary
Sorghum yield was increased to 3.97 t ha-1, higher than the control at 2.32 t ha-1 dry beans.
- Outcome
- sorghum yieldse0
- Direction
- highere0
- Value
- 3.97 t ha-1e0
- Qualifier
- 2.32 t ha-1 dry beanse0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“increased sorghum yields, respectively by 4.04 t ha-1, 3.97 t ha-1 and 3.87 t ha-1 dry beans, higher than the control which only achieved 2.32 t ha-1 dry beans”
Claim · model-written summary
Sorghum yield was increased to 3.87 t ha-1, higher than the control at 2.32 t ha-1 dry beans.
- Outcome
- sorghum yieldse0
- Direction
- highere0
- Value
- 3.87 t ha-1e0
- Qualifier
- 2.32 t ha-1 dry beanse0
- Comparator
- controle0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“increased sorghum yields, respectively by 4.04 t ha-1, 3.97 t ha-1 and 3.87 t ha-1 dry beans, higher than the control which only achieved 2.32 t ha-1 dry beans”
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