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| Registros recuperados: 26 | |
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| Guimarães,Rita de Cássia Melo; Cruz,Mara Cristina Pessôa da; Ferreira,Manoel Evaristo; Taniguchi,Carlos Alberto Kenji. |
| The impact of agro-industrial organic wastes in the environment can be reduced when used in agriculture. From the standpoint of soil fertility, residue applications can increase the organic matter content and provide nutrients for plants. This study evaluated the effect of biological sludge from gelatin industry on the chemical properties of two Ultisols (loamy sand and sandy clay) and an Oxisol (clay). The experiment lasted 120 days and was carried out in laboratory in a completely randomized design with factorial arrangement, combining the three soils and six biological sludge rates (0, 100, 200, 300, 400, and 500 m³ ha-1), with three replications. Biological sludge rates of up to 500 m³ ha-1 decreased soil acidity and increased the effective cation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste; Nutrients; Soil pH; Effective CEC. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200034 |
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| MAEDA, S.; ROMAN, E. S.; LEÔNIDAS, F. das C.; LIMA, J. A. de S.. |
| Experimentos conduzidos no campo experimental do Centro de Pesquisa Agroflorestal de Rondonia (CPAF-RO) da EMBRAPA, municipio de Vilhena, RO. Utilizou-se o delineamento experimental em blocos ao acaso com quatro repeticoes. Os ensaios foram conduzidos durante cinco anos agricolas, com inicio em 1983/84. Resultados concluiram que a calagem afetou positiva e significativamente o rendimento de graos, altura das plantas e da insercao da primeira vagem da soja cv. Tropical. A aplicacao de 1/2 NC a lanco na ausencia de "filler" na linha foi a dose mais adequada, proporcinando rendimentos de graos semelhantes aos obtidos com 1,0 ou 1,5 NC a lanco ou1/2 a lanco mais "filler" na linha. Para o cerrado de Rondonia o uso de calcario finamente moido na linha de... |
| Tipo: Folhetos |
Palavras-chave: Embrapa Rondônia; Vilhena (RO); Rondônia; Amazônia Ocidental; Western Amazon; Soja; Glycine Max; Acidez do Solo; Corretivo; Calagem; Pratica Cultural; Rendimento; Campo Experimental; Cerrado; Soybeans; Soil pH; Liming; Plant cultural practices; Crop yield; Cerrado soils. |
| Ano: 1995 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697881 |
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| Rosa,Sara Dantas; Silva,Carlos Alberto; Maluf,Henrique José Guimarães Moreira. |
| ABSTRACT Extractable phosphorus (P) in soil depends on soil test employed, reactivity of fertilizer and interaction of P added to the soil properties, including organic matter. The aim of this paper was to assess the contents of P extracted from Red Latosol (LVd) and Quartzarenic Neosol (RQ) samples, incubated with 0; 5; 10; 50 or 100 mg kg-1 C-humic acid (C-HA) and 400 mg kg-1 of P, via Araxá phosphate rock (AP), Bayóvar reactive phosphate rock (BP) or single superphosphate (SS). Thus, it was adopted a five (C-HA concentrations) x three (P sources) factorial arrangement, using a randomized block design with three replications. The mixtures of soil, C-HA concentrations and P sources were incubated for 60 days; in sequence, the soil P was extracted by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humic substances; Extractors of soil P; Soil pH; Phosphate rocks. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100032 |
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| Franceschi,Mauricio; Arantes,Sayonara A. do C. M.; Andrade,Ednaldo A. de; Rocha,Adriano M. da; Arantes,Kelte R.; Yamashita,Oscar M.. |
| ABSTRACT The practice of liming may influence the leaching of herbicides in soils, especially those with weak acid character, such as picloram. The study on leaching, preserving soil structure, is an important factor when one intends to understand the dynamics of herbicides and environmental impacts. Thus, the effect of liming on picloram leaching in a dystrophic Red Yellow Latosol under field conditions was studied using a bioindicator plant. The experiment was set up in a completely randomized design (CRD), in split-plot scheme, with factorial in the plot. The factors of the plot corresponded to two soil conditions (presence and absence of liming) and 5 picloram concentrations (0; 384; 768; 1152; 1536 g ha-1), and the factor of the subplot was 5 soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Herbicide dynamics; Soil pH. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200103 |
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| Oliveira,Itamar Pereira de; Asher,Colin J.; Edwards,David G.; Santos,Renato S. Mota dos. |
| Magnesium applications (MgS0(4).7H(2)0) to achieve 8 and 16 mmol c/cm3 of Mg (324 and 1284 kg of MgS0(4) ha-1) were made on one Ultisol from Australia Northeast to correct Mg deficiency in plants and to verify the optimum level of Mg to grow common bean (Phaseolus vulgaris L). Magnesium was applied together with lime, N, K, Cu, Zn, B, and Mo as calcium carbonate, ammonium nitrate, potassium phosphate, cupric and zinc sulphate, boric acid and sodium molybdate respectively a month before planting and P as phosphoric acid at the planting. The pH reached the equilibrium after six weeks of incubation. Higher electrical conductivity (EC) was observed in soil where Mg was applied to reach 8 mmol c/cm3 in the absence of common bean and 16 mmol c/cm3 when the plant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Magnesium; Plant height; Soil pH; Electrical conductivity. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100025 |
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| FREITAS, D. A. F. de; CARDOSO, E. L.; SILVA, M. L. N.; SANTOS, S. A.. |
| O Pantanal da Nhecolândia é caracterizado por uma elevada diversidade de unidades de vegetação que apresentam diferenças na fertilidade do solo. O presente estudo objetivou avaliar a disponibilidade de micronutrientes do solo sob as diferentes fitofisionomias desta região. Amostras de solo foram coletadas na profundidade de 0-10 cm, para avaliação da disponibilidade de zinco, ferro, manganês, cobre, boro e sódio, em sete fitofisionomias sujeitas a diferentes regimes de inundação: a) livres de inundação - floresta semidecídua e cerradão; b) sujeitas a inundação ocasional ? cerrado/campo cerrado e campo limpo com predominância de Elionurus muticus; c) sujeita a inundação sazonal - campo limpo com predominância de Axonopus purpusii e Andropogon spp.; bordas... |
| Tipo: Folhetos |
Palavras-chave: PH do solo; Native vegetation; Matéria Orgânica; Vegetação Nativa; Organic matter; Soil pH. |
| Ano: 2011 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/921423 |
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| Cornejo,Pablo ; Rubio,Rosa ; Borie,Fernando . |
| Arbuscular mycorrhizal fungi (AMF) form symbiosis with plant roots, improving its establishment, nutrition, and tolerance to adverse soil conditions. In annual crop rotations, some aspects such as the type of N fertilizer and tillage system used can affect the AMF propagule density and its functionality in the following crop. To analyze the effect of the agronomic practices previously mentioned on the persistence and density of AMF propagules, a study in a succession of cereals was carried out. For this, soil previously cropped with wheat (Triticum aestivum L.) and fertilized with urea (NH4+) or sodium nitrate (NO3-) was disturbed in each case by simulating conventional tillage (CT) or maintained without disturbing, simulating no-tillage (NT). It was then... |
| Tipo: Journal article |
Palavras-chave: Arbuscular mycorrhiza; Mycorrhizal propagules; Soil disturbing; Soil pH; Wheat-oat succession. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300016 |
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| Gaiad,Sérgio; Rakocevic,Miroslava; Reissmann,Carlos Bruno. |
| The influence of different N sources on the growth of maté (Ilex paragurariensis St.Hil.) seedlings grown in greenhouse was studied. All seedlings received a base fertilization of 10 mg N.kg-1 soil as NH4NO3, 60 mg P2O5.and 40 mg K2O.kg-1 soil as KH2PO4 15 days before treatments application. Treatments were as follow: Control, with no extra N added; Urea = 100 mg N.kg-1 soil as Urea; NO3- = 100 mg N.kg-1 soil as Ca(NO3)2; and NH4+ = 100 mg N.kg-1 soil as (NH4)2SO4. It was concluded that: 1) increasing N content in leaves alone was not able to promote gain in biomass production of maté seedlings; 2) seedlings receiving N-NH4 showed a higher accumulation of P and Mg on shoot biomass; and 3) an increase in leaf area, leaf number and net photosynthesis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonium; Nitrate; Soil pH. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600001 |
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| Registros recuperados: 26 | |
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