Abstract
The data from long-term management and cropping systems experiments are needed to assess changes in soil quality, organic carbon pool, and agronomic sustainability. Thus, a 13-year-old soil fertility management experiment was used to assess the impact of crop residues carbon (C) inputs on SOC stock in a rainfed groundnut (Arachis hypogeae L.)–fingermillet (Eleusine coracana (L.) Gaertn) rotation in semiarid alfisol. The application of farmyard manure (FYM) alone or in a combination with chemical fertilizers contributed to higher amounts of C inputs and subsequently to build up a higher SOC pool. Application of 10 Mg ha−1 of FYM and a recommended dose of chemical fertilizer (25:21.8:20.7 and 50:21.8:20.7 kg N, P, K ha−1 for groundnut and fingermillet, respectively) increased soil SOC pool by 41.2% to 73.0 Mg ha−1 with an increase of 9.3 Mg ha−1 over 13 years. Both SOC pool and rates of its sequestration were positively correlated with cumulative C input and sustainable yield index. A minimal input of 1.62 Mg C ha−1 yr−1 is needed to maintain SOC pool at the antecedent level. Balanced application of NPK fertilizers is needed to reduce and reverse the depletion of SOC pool.
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Claims 8
Claim · model-written summary
Farmyard manure alone or with fertilizer increased carbon inputs and soil organic carbon pool.
- Taxon
- groundnut–finger millet
Arachis hypogaea
Eleusine coracanat0 - Treatment
- farmyard manure (FYM) alone or in a combination with chemical fertilizerse0
- Outcome
- higher amounts of C inputs and subsequently to build up a higher SOC poole0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of farmyard manure (FYM) alone or in a combination with chemical fertilizers contributed to higher amounts of C inputs and subsequently to build up a higher SOC pool”
t0“groundnut–finger millet rotation”
Claim · model-written summary
Farmyard manure and recommended fertilizer increased soil organic carbon pool by 41.2% to 73.0 Mg ha−1.
- Taxon
- groundnutArachis hypogaeae0
- Treatment
- 10 Mg ha−1 of FYM and a recommended dose of chemical fertilizere0
- Outcome
- soil SOC poole0
- Direction
- increasede0
- Value
- 41.2%e0
- Qualifier
- 73.0 Mg ha−1 with an increase of 9.3 Mg ha−1 over 13 yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 10 Mg ha−1 of FYM and a recommended dose of chemical fertilizer (25:21.8:20.7 and 50:21.8:20.7 kg N, P, K ha−1 for groundnut and fingermillet, respectively) increased soil SOC pool by 41.2% to 73.0 Mg ha−1 with an increase of 9.3 Mg ha−1 over 13 years”
Claim · model-written summary
Soil organic carbon pool was positively correlated with cumulative carbon input.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- SOC poole0
- Direction
- positively correlatede0
- Comparator
- cumulative C inpute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both SOC pool and rates of its sequestration were positively correlated with cumulative C input and sustainable yield index”
t0“groundnut–finger millet rotation”
Claim · model-written summary
Soil organic carbon sequestration rate was positively correlated with cumulative carbon input.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- rates of its sequestratione0
- Direction
- positively correlatede0
- Comparator
- cumulative C inpute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both SOC pool and rates of its sequestration were positively correlated with cumulative C input and sustainable yield index”
t0“groundnut–finger millet rotation”
Claim · model-written summary
Soil organic carbon pool was positively correlated with sustainable yield index.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- SOC poole0
- Direction
- positively correlatede0
- Comparator
- sustainable yield indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both SOC pool and rates of its sequestration were positively correlated with cumulative C input and sustainable yield index”
t0“groundnut–finger millet rotation”
Claim · model-written summary
Soil organic carbon sequestration rate was positively correlated with sustainable yield index.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- rates of its sequestratione0
- Direction
- positively correlatede0
- Comparator
- sustainable yield indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both SOC pool and rates of its sequestration were positively correlated with cumulative C input and sustainable yield index”
t0“groundnut–finger millet rotation”
Claim · model-written summary
An annual carbon input of at least 1.62 Mg C ha−1 yr−1 is needed to maintain the initial soil carbon pool.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- maintain SOC pool at the antecedent levele0
- Value
- 1.62 Mg C ha−1 yr−1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A minimal input of 1.62 Mg C ha−1 yr−1 is needed to maintain SOC pool at the antecedent level”
t0“groundnut–finger millet rotation”
Claim · model-written summary
Balanced NPK fertilizer application is recommended to reverse soil carbon depletion.
- Taxon
- groundnut–finger milletArachis hypogaeaEleusine coracanat0
- Outcome
- reduce and reverse the depletion of SOC poole0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Balanced application of NPK fertilizers is needed to reduce and reverse the depletion of SOC pool”
t0“groundnut–finger millet rotation”
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See all 19 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.