|
|
|
| Registros recuperados: 16 | |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| PICCOLO, M. C.; BIELUCZYK, W.; REIS, L. C.; PEREIRA, M. G.; BALIEIRO, F. C.. |
| The identification and quantification of labile and recalcitrant soil organic matter (SOM) forms can be used to evaluate the impacts of management on soil quality (SQ). This study characterized the SOM through chemical and granulometric fractionation in areas located in the Savannah biome. Preserved, cultivated and environmental recovering areas were evaluated. For all fractions of SOM, except for the particulate organic carbon (POC), the preserved areas showed higher levels. The SOM had a positive correlation with the cation exchange capacity and negative with bulk density of soil (p ≤ 0.01). The results showed that SOM improved the physical and chemical SQ, and crops reduced the levels of carbon (C) in SOM fractions, negatively affecting the SQ. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Fracionamento de carbono; Qualidade do solo; Latossolos; Agricultura tropical; Preservação ambiental; Fracionamento; Carbono; Latossolo; Agricultura; Preservação da natureza; Solo; Qualidade; Carbon; Fractionation; Soil quality; Oxisols; Tropical agriculture. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001611 |
| |
|
| |
|
|
| SIMPLÍCIO, A. A.; SANTOS, D. O.. |
| Resumo: Os caprinos e ovinos em regiões tropicais desde que explorados racionalmente contribuem para a geração de emprego e renda através da produção de carne, leite, pele, esterco e pêlo. Na maioria das explorações, a produtividade dos caprinos e ovinos ainda é baixa. Independente das adversidades do ambiente e da variação que as condições climáticas possam sofrer ao longo do ano, o quadro é agravado pela pouca atenção dada por parte de produtores e técnicos na definição de objetivos, metas e estratégias aliada à ausência de investimentos na melhoria no regime de manejo e no modelo físico de exploração que devem ser compatíveis com a raça ou grau de sangue dos animais. Algumas vezes, a pequena aptidão dos rebanhos para produzir carne, leite e pele, requer... |
| Tipo: Parte de livro |
Palavras-chave: Caprino; Ovino; Reprodução animal; Eficiência reprodutiva; Goats; Sheep; Animal reproduction; Tropical agriculture; Reproductive performance. |
| Ano: 2005 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1068895 |
| |
|
| |
|
|
| BITTENCOURT, C. B.; LINS, P. de C.; BOARI, A. de J.; QUIRINO, B. F.; TEIXEIRA, W. G.; SOUZA JUNIOR, M. T.. |
| Abstract: Fatal yellowing disease (FY) is a bud rot-type disease that severely affects oil palm plantations in Latin America. Since 1974, when it was first reported in Brazil, this disorder has been responsible for severe economic losses in the oil palm industry; and, for nearly 50 years, several studies have tried to identify its causal agent, without success. The etiological studies regarding FY in oil palm explored either biotic and abiotic stress scenarios, in a single or combined manner. Most recently, the hypothesis in favor of one biotic cause has lost some grounds to the abiotic one, mainly due to new insights regarding deficient aeration in the soil, which reduces the potential for oxy-reduction, causing changes in the ionic composition of the... |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Amarelecimento letal; Fatal yellowing; Dendê; Epidemiology; Palm oils; Abiotic stress; Biotic stress; Etiology; Elaeis; Tropical agriculture. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135533 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| SANCHES, I. D.; LUIZ, A. J. B.; MONTIBELLER, B.; SCHULTZ, B.; TRABAQUINI, K.; EBERHARDT, D. S.; FORMAGGIO, A. R.; MAURANO, L. E. P.. |
| Abstract: The agricultural activity can greatly benefit from remote sensing technology (RS). Optical passive RS has been vastly explored for agricultural mapping and monitoring, in despite of cloud cover issue. This is observed even in the tropics, where frequency of clouds is very high. However, more studies are needed to better understand the high dynamism of tropical agriculture and its impact on the use of passive RS. In tropical countries, such as in Brazil, the use of current agricultural technologies, associated with favourable climate, allow the planting period to be wide and to have plants of varying phenological cycles. In this context, the main objective of the current study is to better understand the dynamics of a selected area in Southeast of... |
| Tipo: Artigo de periódico |
Palavras-chave: Satellite image; Optical sensor; Multispectral; RGB false composition; NDVI; Sensoriamento Remoto; Satélite; Agricultura; Satellites; Image analysis; Image interpretation; Tropical agriculture; Monitoring. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1116250 |
| |
| Registros recuperados: 16 | |
|
|
|
