Heterogeneous global crop yield response to biochar: a meta-regression analysis
TLDR
In this article, the authors employ meta-analytical, missing data, and semiparametric statistical methods to explain heterogeneity in crop yield responses across different soils, biochars, and agricultural management factors, and then estimate potential changes in yield across different soil environments globally.Abstract:
Biochar may contribute to climate change mitigation at negative cost by sequestering photosynthetically fixed carbon in soil while increasing crop yields. The magnitude of biochar's potential in this regard will depend on crop yield benefits, which have not been well-characterized across different soils and biochars. Using data from 84 studies, we employ meta-analytical, missing data, and semiparametric statistical methods to explain heterogeneity in crop yield responses across different soils, biochars, and agricultural management factors, and then estimate potential changes in yield across different soil environments globally. We find that soil cation exchange capacity and organic carbon were strong predictors of yield response, with low cation exchange and low carbon associated with positive response. We also find that yield response increases over time since initial application, compared to non-biochar controls. High reported soil clay content and low soil pH were weaker predictors of higher yield response. No biochar parameters in our dataset—biochar pH, percentage carbon content, or temperature of pyrolysis—were significant predictors of yield impacts. Projecting our fitted model onto a global soil database, we find the largest potential increases in areas with highly weathered soils, such as those characterizing much of the humid tropics. Richer soils characterizing much of the world's important agricultural areas appear to be less likely to benefit from biochar.read more
Citations
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Biochar for sustainable agricultural intensification: technical/economic potential, and technology adoption - eScholarship
TL;DR: In this paper, a meta-analysis of crop yield response to biochar was conducted in the field of smallholder farmers in rural western Kenya and northern Vietnam, and the results of a Kenyan field experiment on adoption and impact on impact of biochar were reported.
Influence of biochar on nutrients dynamics in tropical soils of Burkina Faso
TL;DR: The site MatheO as mentioned in this paper adopts a similar principle to the "Budapest Open Access Initiative" (BOAI, 2002) in that l'utilisateur of the site peut lire, télécharger, copier, transmettre, imprimer, crediting, and crediting documents.
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Use of Piptatherum miliaceum to enable the establishment success of Salvia rosmarinus in Technosols developed from pyritic tailings.
Alicia Morugán-Coronado,Martín Soriano-Disla,Fabián Moreno-Barriga,Carlos Linares,Ángel Faz,Fuensanta García-Orenes,María Dolores Gómez-López,Raúl Zornoza +7 more
TL;DR: Growing Sr + Pm seems a suitable strategy to improve soil properties, including microbial abundance, with low translocation of metals, although the BCh rate did not affect plant growth or soil physicochemical properties, the lowest rate contributed to the growth of soil microorganisms better.
References
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Data Analysis Using Regression and Multilevel/Hierarchical Models
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Multiple imputation using chained equations: Issues and guidance for practice
TL;DR: The principles of the method and how to impute categorical and quantitative variables, including skewed variables, are described and shown and the practical analysis of multiply imputed data is described, including model building and model checking.