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| Registros recuperados: 12 | |
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| Rezende,Bráulio L. A; Cecílio Filho,Arthur B; Barros Júnior,Aurélio P; Porto,Diego R. Q; Martins,Maria Inez E. G. |
| The economical analysis complements the evaluation of the intercrop systems efficiency, considering besides the physical production of crops, the price of products according to their quality classification and time of the year. Intercropping systems of lettuce and cucumber in two plant populations under greenhouse were economically evaluated in winter-spring, in Jaboticabal City, São Paulo State, Brazil. The total operating cost (TOC) of cucumber and lettuce as sole crop and intercropping were estimated, as well as gross revenue (GR) and operating profit (OP). The labor for the crops was the component with greater participation in the TOC of crops in intercropping and single crop. Greater GR and OP were observed in intercrops established by transplanting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Cucumis sativus; Economics; Agronomic efficiency. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200028 |
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| Silva,Douglas Ramos Guelfi; Pereira,André Ferreira; Dourado,Ronaldo Liberato; Silva,Frederico Pinto da; Ávila,Fabrício William; Faquin,Valdemar. |
| The management of nitrogen fertilization is complex due to the various transformations of the nitrogen that occur in the soil-plant-atmosphere system, reducing the efficiency of the fertilization, productivity and the profit margin of the maize production areas. This study aimed to evaluate the effect of different levels of common urea and urea treat with NBPT [N-(n-butyl) thiophosphoric triamide] on the productivity and efficiency of the nitrogen fertilization in maize, correlated with simple economic analysis. The design of the field experiment was in randomized complete blocks with six repetitions, in a 2 x 4 factorial outline, made up of by two sources of nitrogen (urea and NBPT-treated urea) and four levels of nitrogen as top dressing (60, 120, 180... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Zea mays; Nitrogen; Urease inhibitor; Agronomic efficiency; Gross profit margin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000300012 |
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| Porto,Vânia CN; Bezerra Neto,Francisco; Lima,Jailma SS de; Barros Júnior,Aurélio P; Moreira,Joserlan N. |
| The intercropping practice is a viable technological option for the production of vegetables and the success of the association between crops will be greater the greater the complementarity between them. The present work was conducted from June to November 2006, at Universidade Federal Rural do Semi-Árido, Rio Grande do Norte State, Brazil, to evaluate the productive performance of two lettuce and two rocket cultivars in two cultures in strip-intercropping systems. The experimental design was randomized complete blocks, with five replications and treatments arranged in a 2 x 2 + 2 factorial. The treatments consisted of the combination of two lettuce cultivars (Babá de Verão and Tainá) and two of rocket (Cultivada and Folha Larga) intercropped with carrot... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Daucus carota; Eruca sativa; Agronomic efficiency; Combined analysis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300025 |
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| Corrêa,Juliano Corulli; Grohskopf,Marco André; Nicoloso,Rodrigo da Silveira; Lourenço,Késia Silva; Martini,Rosemari. |
| Abstract: The objective of this work was to evaluate soil chemical attributes, leaf nitrogen content, and corn and wheat yields under a no-tillage system in response to the application of organic, organomineral, and mineral fertilizers with or without urease and nitrification inhibitors. The experiment was carried out on the field, with one wheat and two corn crops, on a Rhodic Kandiudox, in a randomized complete block design with six replicates. The evaluated treatments were: control, without fertilization; O, poultry litter as an organic fertilizer; O+I, poultry litter and inhibitors; OM, organomineral fertilizer; OM+I, organomineral fertilizer and inhibitors; U, urea as a mineral fertilizer; and U+I, super urea with the urease inhibitor alone. The use... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Zea mays; Agronomic efficiency; Poultry litter; Nitrogen fertilization; Volatilization losses. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000800916 |
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| Grohskopf,Marco André; Corrêa,Juliano Corulli; Fernandes,Dirceu Maximino; Benites,Vinícius de Melo; Teixeira,Paulo César; Cruz,Caio Vilela. |
| Abstract: The objective of this work was to evaluate the nutritional content and grain yield of three corn (Zea mays) crops in response to phosphate fertilization with an organomineral fertilizer based on poultry litter or a mineral fertilizer, when cultivated on a Rhodic Khandiudox with a high initial phosphorus content. The experiment was carried out in the field in a randomized complete block design in a 2×4+1 factorial arrangement (organomineral or mineral fertilizer × 20, 40, 60, or 80 kg ha-1 P + control treatment with no phosphate fertilization), with four replicates each. Available P and total organic carbon (TOC) contents in the soil at the end of the crop cycle, plant tissue P contents, and grain yield were determined. The agronomic efficiency... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomic efficiency; Fertilization; Mineral fertilizer; Organic waste. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103806 |
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| Feitosa,Izabela de Lima; Passos,Alexandre Martins Abdão dos; Cipriani,Henrique Nery; Oliveira,Marcelo Silva de; Marcolan,Alaerto Luiz; Vasques,Gustavo Mattos. |
| Abstract: The objective of this work was to analyze the spatial variability of soil physical attributes in integrated production systems and its relationship with the growth and yield of a corn (Zea mays) crop intercropped with palisade grass (Urochloa brizantha). The experiment was carried out in an integrated crop-livestock (ICL) system and in an integrated crop-livestock-forestry (ICLF) system, in a Plinthic Hapludox. The ICLF system was managed in alleys between eucalyptus (Eucalyptus spp.) rows, spaced at 18, 30, and 42 m. Corn grain and forage yields were positively correlated with soil clay and moisture contents, whereas grain yield was negatively correlated with soil penetration resistance. The lowest corn plant heights and grain yields were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Urochloa brizantha; Agronomic efficiency; Precision agriculture; Soil compaction; Soil variability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100600 |
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| HASNAIN,Z.; BAKHSH,I.; HUSSAIN,I.; SHEHERYAR,; E.A.,KHAN. |
| ABSTRACT: The study aimed to highlight the impact of naphthalene acetic acid (NAA) and irrigation regimes on the productivity of coarse rice under agro-ecological conditions of Dera Ismail Khan, Pakistan. The experiment was comprised of two factors with four levels (0, 60, 90, 120 mL ha-1) of NAA and irrigation at the depths (60, 75, 90 and 105 cm) of soil profile. The data was interpreted to observe the plant height (cm), productive tillers (m-2), sterility percentage (%), biological yield (t ha-1), and grain yield (t ha-1) of coarse rice. The benefit cost ratio (BCR) was also calculated. The results indicated that the application of NAA was found very effective in improving paddy yield and hence resulted in better BCR value. The maximum paddy yield was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomic efficiency; Soil moisture; Growth regulator; Benefit-cost ratio; Oryza sativa. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100207 |
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| Mancuso,Mauricio Antonio Cuzato; Soratto,Rogério Peres; Crusciol,Carlos Alexandre Costa; Castro,Gustavo Spadotti Amaral. |
| The use of potassium (K) rock powder can be an alternative for K supply of crops. Thus, to reduce K fertilizer imports from abroad, possibilities of extracting this nutrient from Brazilian rocks are being studied. The objective was to evaluate the effect of phonolite rock powder (F2) as K source (Ekosil®) on the air-dried fruit yield, nutrition and macronutrient export of Arabica coffee. The experiment was carried out on a dystroferric Red Latosol (Typic Haplorthox), in Piraju, São Paulo State, Brazil, in the 2008/09 and 2009/10 growing seasons. The experimental design was a randomized complete block, in a factorial 2 × 3 + 1 arrangement, with four replications. The treatments consisted of two K sources (KCl - 58 % of K2O and F2 - 8.42 % K2O) and three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Potassium fertilization; Rock powder; Agronomic efficiency. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500010 |
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| Corrêa,Rodrigo Studart; White,Robert E.; Weatherley,Anthony J.. |
| Biosolids have been reported to increase yields and supply plant nutrients. However, complying with health and environmental standards is necessary before applying biosolids to land. Thus, sludge stabilization is required to make biosolids safe enough for their agricultural use. Side effects of stabilization processes on agronomic features of sewage sludge are not quite known, although their understanding is essential for biosolids management. Based on a model equivalent to the Mitscherlich equation, effects of the most common processes for sludge stabilization were evaluated (composting, liming, heat-drying and solar irradiation) in relation to the agronomic effectiveness of biosolids to yield Lolium perenne L. on two tropical soils, with NH4H2PO4 as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium perenne L.; Mitscherlich; Sewage sludge; Biosolids; Agronomic efficiency. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300011 |
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| Oliveira-Longatti,Silvia Maria de; Cannata,Marcele Gabriel; Ferrazani,Júlia Costa; Carvalho,Teotonio Soares de; Ciavatta,Claudio; Guilherme,Luiz Roberto Guimarães. |
| ABSTRACT Nitrogen (N) is an important nutrient for agriculture, and Brazil is heavily dependent on N imports. A by-product of the intermediate processes of tanning (BPIPT) may be used as an N fertilizer which will reduce this dependency, but its chromium (Cr) content is a matter of concern. This work assessed Cr (III, VI) and N (total, inorganic) contents in four soil samples with contrasting characteristics (especially with respect to their content of manganese (Mn), a potential Cr(III) oxidant), following the addition of the BPIPT. Chemical and microbiological indicators of soil quality were measured to assess the agronomic and environmental implications of the BPIPT addition in Brazilian soils. Our results indicate that the BPIPT is a promising source... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: High-Mn soils; Agronomic efficiency; Trivalent chromium; Hexavalent chromium; Microbiological parameters. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000300250 |
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| Registros recuperados: 12 | |
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