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| Almekinders, Conny J. M.; Knowledge, Technology and Innovation Group, Wageningen University; conny.almekinders@wur.nl; Stomph, Tjeerd-Jan; Centre for Crop Systems Analysis, Wageningen University; tjeerdjan.stomph@wur.nl; Struik, Paul C.; Centre for Crop Systems Analysis, Wageningen University; paul.struik@wur.nl. |
| We evaluated farmers’ rationales to understand their decision making in relation to the use of fertile anthropogenic soils, i.e., Amazonian dark earths (ADE), and for dealing with changes in shifting cultivation in Central Amazonia. We analyzed qualitative information from 196 interviews with farmers in 21 riverine villages along the Madeira River. In order to decide about crop management options to attain their livelihood objectives, farmers rely on an integrated and dynamic understanding of their biophysical and social environment. Farmers associate fallow development with higher crop yields and lower weed pressure, but ADE is always associated with high yields and high weeding requirements. Amazonian dark earths are also seen as an opportunity... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Amazonia; Amazonian dark earths; Decision making; Intensification; Slash and burn; Swidden cultivation; Terra preta. |
| Ano: 2016 |
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| Alves-Pereira,Alessandro; Peroni,Nivaldo; Cavallari,Marcelo Mattos; Lemes,Maristerra R.; Zucchi,Maria Imaculada; Clement,Charles R.. |
| Abstract Although manioc is well adapted to nutrient-poor Oxisols of Amazonia, ethnobotanical observations show that bitter manioc is also frequently cultivated in the highly fertile soils of the floodplains and Amazonian dark earths (ADE) along the middle Madeira River. Because different sets of varieties are grown in each soil type, and there are agronomic similarities between ADE and floodplain varieties, it was hypothesized that varieties grown in ADE and floodplain were more closely related to each other than either is to varieties grown in Oxisols. We tested this hypothesis evaluating the intra-varietal genetic diversity and the genetic relationships among manioc varieties commonly cultivated in Oxisols, ADE and floodplain soils. Genetic results did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Microsatellites; Amazonian dark earths; Floodplain; Oxisols. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000300468 |
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