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| Silva Neto, Eduardo Carvalho da; Pereira, Marcos Gervasio; Frade Júnior, Elizio Ferreira; Silva, Sandra Bezerra da; Carvalho Júnior, João Andrade; Santos, José Carlos dos. |
| In Amazonia, the main causes of deforestation are systems based on slash-and-burn agriculture. The objective of this work was to evaluate temporal changes in the soil chemical attributes after the vegetation has been slashed and burned in an area of native forest in the Western Amazon. For this study, four hectares of forest in Cruzeiro do Sul, State of Acre, Brazil, was slashed and burned. The soil in the study area was classified as Ultisol (Argissolo Amarelo Distrófico típico). Soil samples were collected over the course of one year, the first one being collected 16 hours after the burn and the others at 30, 60, 90, 150, 210, 270, and 360 days after the burn. The soil surface layers were more sensitive to fire action. Ashes from vegetation burn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian agroecosystem; Soil fertility; Cycling of nutrients; Soil management; Brasil.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42609 |
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| Silva Neto, Eduardo Carvalho da; Pereira, Marcos Gervasio; Frade Júnior, Elizio Ferreira; Silva, Sandra Bezerra da; Carvalho Júnior, João Andrade; Santos, José Carlos dos. |
| In Amazonia, the main causes of deforestation are systems based on slash-and-burn agriculture. The objective of this work was to evaluate temporal changes in the soil chemical attributes after the vegetation has been slashed and burned in an area of native forest in the Western Amazon. For this study, four hectares of forest in Cruzeiro do Sul, State of Acre, Brazil, was slashed and burned. The soil in the study area was classified as Ultisol (Argissolo Amarelo Distrófico típico). Soil samples were collected over the course of one year, the first one being collected 16 hours after the burn and the others at 30, 60, 90, 150, 210, 270, and 360 days after the burn. The soil surface layers were more sensitive to fire action. Ashes from vegetation burn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian agroecosystem; Soil fertility; Cycling of nutrients; Soil management; Brasil.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42609 |
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| Bossolani,João W.; Lazarini,Edson; Souza,Luiz G. M. de; Parente,Tiago de L.; Caioni,Sheila; Biazi,Naira Q. de. |
| ABSTRACT Early potassium fertilization in previous crops may be beneficial to the main crop in succession. The objective of this study was to investigate the behavior of the soybean crop as a function of potassium (K) doses in the previous crops, associated or not with K application in soybean. The experiment was carried out from 2012 to 2015 in an experimental area of the Faculty of Engineering, UNESP, Campus of Ilha Solteira-SP, located in Selvíria-MS, Brazil. For the previous crops, a randomized block design was used in a 3 x 4 factorial scheme with four replications, i.e., three previous crops (maize, sorghum and millet) and four K doses (0, 35, 70 and 120 kg ha-1 of K2O). For soybean in succession, a randomized complete block design was used in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization of systems; Cycling of nutrients; Glycine max (L.) Merrill. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200090 |
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