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| Araújo, Ademir Sérgio Ferreira de; Melo, Wanderley José de. |
| Agricultural production systems have to combine management practices in order to sustain soil's profitability and quality. Organic farming is gaining worldwide acceptance and has been expanding at an annual rate of 20% in the last decade, accounting for over 24 million hectares worldwide. Organic practices avoid applications of synthetic fertilizers and pesticides, rely on organic inputs and recycling for nutrient supply, and emphasize cropping system design and biological processes for pest management, as defined by organic farming regulation in the world. In comparison with conventional farming, organic farming has potential benefits in improving food quality and safety. Plant production in organic farming mainly depends on nutrient release as a function... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2010 |
URL: http://orgprints.org/22389/1/Araujo_Soil.pdf |
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| Araújo, Ademir Sérgio Ferreira de; Lima, Luciano Moura; Melo, Wanderley José de; Santos, Vilma Maria dos; Araujo, Fabio Fernando de. |
| This study evaluated soil properties and cowpea yield after six years of consecutive amendment of composted tannery sludge. The compost was applied annually at 0, 2.5, 5, 10, and 20 Mg ha-1 and at the end of the sixth year, the chemical and physical properties of the soil were evaluated using a randomized block design. The Cr, P, K, Ca, Na and organic C contents and the pH and cation exchange capacity increased linearly after six years of compost amendment. The soil bulk density decreased linearly while the aggregate stability index increased after compost amendment. As a consequence of the changes in the chemical and physical properties of the soil, cowpea yield showed a quadratic response to the tannery rates, with an estimated maximum cowpea yield at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste management; Soil fertility; Soil quality Ciencia do Solo. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28281 |
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| Gonçalves, Iuna Carmo Ribeiro; Araújo, Ademir Sérgio Ferreira; Nunes, Luis Alfredo Pinheiro; Bezerra, Antônio Aécio Carvalho; Melo, Wanderley José de. |
| The study aimed to evaluate the phytoavailability of heavy metals (Cr, Cd, Ni and Pb) concentrations in leaves and grains, and yield of cowpea (Vigna unguiculata L) grown in soil amended with composted tannery sludge (CTS) for two consecutive years. The experiments were carried out in 2009 and 2010 in soil amended with CTS at 0, 5, 10, 20, and 40 Mg ha-1. The CTS amendment rates applied were above 10 Mg ha-1, increased Cr concentrations in cowpea leaves. There were not increases in the heavy metals concentrations in cowpea grains after two years. In 2009, the application of CTS amendment did not promote increase in plant yield. However, in 2010, CTS amendment at 10 and 20 Mg ha-1 increased cowpea yield. The amendment of composted tannery sludge linearly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia Vigna unguiculata; Organic residues; Trace elements Ciencia do Solo. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18094 |
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