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A cana-de-açúcar na Transamazônica, PA: resultados de 8 anos de pesquisa, 1974/82. Infoteca-e
POLTRONIERI, L. S.; ROCHA, A. C. P. N. da; COSTA, M. S..
bitstream/item/57751/1/Altamira-Doc5.pdf
Tipo: Documentos (INFOTECA-E) Palavras-chave: Cana-de-açúcar; Cultivar; Sacharum officinarum; Transamazônica; Pará; Brasil; Sugar cane; Fertilizer; Yield; Variety.; Adubação; Fósforo; Pesquisa; Produtividade.; Amazonia; Phosphorus; Research..
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383049
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A cultura do milho na Amazônia. Infoteca-e
PEREIRA, O. G..
bitstream/item/69744/1/IPEAN-Fitotecnia1.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Cultivo; Melhoramento genetico; Brasil; Maize; Cultivation; Genetic breeding; Cultural practices; Yield; Harvest.; Colheita; Milho; Pesquisa; Polinização; Pratica Cultural; Produtividade.; Plantio; Amazonia; Pollination; Planting; Research..
Ano: 1971 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376203
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A Mixed Effects Model of Crop Yields for Purposes of Premium Determination AgEcon
Roberts, Michael J.; Tack, Jesse B..
Farm income is highly variable due to annual price and yield uncertainties. The federally subsidized crop insurance program is an important tool for managing this risk, and has grown from a relatively modest program to one that encompasses the majority of productive cropland in the country. The success of this program depends on identification of actuarially fair insurance premium rates, which in turn depends on accurate estimation of farm-level yield distributions. We use the confidential U.S. Department of Agriculture Risk Management Agency (RMA) panel dataset to estimate farm-specific distributions of yields and actually fair crop insurance premiums. Our ongoing work includes using the difference between our estimated actually fair premiums and RMA's to...
Tipo: Conference Paper or Presentation Palavras-chave: Yield; Crop Insurance; Policy; Mixed Model; Agricultural and Food Policy.
Ano: 2011 URL: http://purl.umn.edu/103405
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A Revenue-Based Alternative to the Counter-Cyclical Payment Program AgEcon
Cooper, Joseph C..
This paper develops a stochastic model for comparing payments to U.S. corn producers of a revenue-based counter-cyclical payment (R-CCP) that is offered as an alternative in the 2007 House "Farm Bill" (H.R. 2419) to the current price-based CCP (P-CCP). We minimize the potential for miss-specification bias in the model by using nonparametric and semi-nonparametric approaches as specification checks in the model. Using this model, the paper examines the sensitivity of the density function for payments to changes in expected price levels. A mean-variance utility function approach is used to assess producer preferences for choice of CCP program alternative. The results show that as risk reduction instruments at the farm level, there appears to be little...
Tipo: Conference Paper or Presentation Palavras-chave: Domestic support; Counter-cyclical payments; Revenue; Price; Corn; Yield; Pairs bootstrap; Kernel density; Semi-nonparametric; Combinatorial optimization; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/6197
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A statistical approach to define some tofu processing conditions Ciênc. Tecnol. Aliment.
Benassi,Vera de Toledo; Yamashita,Fábio; Prudencio,Sandra Helena.
The aim of this work was to make tofu from soybean cultivar BRS 267 under different processing conditions in order to evaluate the influence of each treatment on the product quality. A fractional factorial 2(5-1) design was used, in which independent variables (thermal treatment, coagulant concentration, coagulation time, curd cutting, and draining time) were tested at two different levels. The response variables studied were hardness, yield, total solids, and protein content of tofu. Polynomial models were generated for each response. To obtain tofu with desirable characteristics (hardness ~4 N, yield 306 g tofu.100 g-1 soybeans, 12 g proteins.100 g-1 tofu and 22 g solids.100 g-1 tofu), the following processing conditions were selected: heating until...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybeans (Glycine max); Hardness; Dihydrated calcium sulfate; Yield; Gelation; Draining.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000400011
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ACHPA: A sensor based system for automatic environmental control in hydroponics Ciênc. Tecnol. Aliment.
SIDDIQ,Asif; TARIQ,Muhammad Owais; ZEHRA,Anum; MALIK,Salman.
Abstract The trend towards tunnel farming and hydroponic systems is increasing owing to the climatic changes as well as the need to increase crop yield. Hydroponic is a technique of growing plants without soil. Tunnel farming and hydroponic system requires controlled environmental parameters like temperature, humidity and soil moisture for better production of crops. This paper presents an effective method, named, ACHPA (Automatically Controlled Hydro-Ponic Agriculture) scheme that monitor and controls environmental parameters using sensors and controller. ACHPA provides better environmental control over traditional manual monitoring and controlling, thus yield high-quality crops. Sensor based monitoring and control system regulates the temperature and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydroponics; Environmental control; Sensors; Controller; Yield.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005031115
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Acidos húmicos y fúlvicos en la producción hidropónica de Chile Manzano (Capsicum pubescens R y P) en invernadero. Colegio de Postgraduados
Hernández Hernández, Antelma.
Para determinar el efecto de substancias húmicas (SH) en el crecimiento del chile manzano (Capsicum pubescens R y P), en invernadero, se evaluaron tres niveles de presión osmótica de solución nutritiva Steiner (0.54, 0.72 y 0.90 atm) y tres concentraciones de aplicación foliar de substancias húmicas (0.5, 1, 1.5 ml.L-1 de agua de las SH). Las variables medidas fueron: diámetro ecuatorial (DE), diámetro polar (DP), volumen (VOL), grosor de pericarpio (GP), numero de frutos comerciales (NFRC), numero de frutos pequeños (NFRP), número total de frutos (NTOT), rendimiento (RTO), peso seco de fruto (PSFR), firmeza (FIR), sólidos solubles totales (OBRIX), capsaicina (CAPS) y macro y micronutrientes (N, P, K, Ca, Mg y Fe. Al aplicar la solución nutritiva con...
Palavras-chave: Substancias húmicas; Solución nutritiva; Capsicum pubescens; Rendimiento; Humic substances; Nutrient solution; Yield; Maestría; Edafología.
Ano: 2011 URL: http://hdl.handle.net/10521/381
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Acidos húmicos y fúlvicos en la producción hidropónica de Chile Manzano (Capsicum pubescens R y P) en invernadero. Colegio de Postgraduados
Hernández Hernández, Antelma.
Para determinar el efecto de substancias húmicas (SH) en el crecimiento del chile manzano (Capsicum pubescens R y P), en invernadero, se evaluaron tres niveles de presión osmótica de solución nutritiva Steiner (0.54, 0.72 y 0.90 atm) y tres concentraciones de aplicación foliar de substancias húmicas (0.5, 1, 1.5 ml.L-1 de agua de las SH). Las variables medidas fueron: diámetro ecuatorial (DE), diámetro polar (DP), volumen (VOL), grosor de pericarpio (GP), numero de frutos comerciales (NFRC), numero de frutos pequeños (NFRP), número total de frutos (NTOT), rendimiento (RTO), peso seco de fruto (PSFR), firmeza (FIR), sólidos solubles totales (OBRIX), capsaicina (CAPS) y macro y micronutrientes (N, P, K, Ca, Mg y Fe. Al aplicar la solución nutritiva con...
Palavras-chave: Substancias húmicas; Solución nutritiva; Capsicum pubescens; Rendimiento; Humic substances; Nutrient solution; Yield; Maestría; Edafología.
Ano: 2011 URL: http://hdl.handle.net/10521/381
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ACRE: A Revenue-Based Alternative to Price-Based Commodity Payment Programs AgEcon
Cooper, Joseph C..
This paper develops a stochastic model for estimating the probability density function of the Average Crop Revenue Election (ACRE), a revenue-based commodity support payment that is offered under the 2008 Farm Act as an alternative to the traditional suite of price-based commodity payments, that is, marketing loan benefits and counter-cyclical payments. We minimize the potential for miss-specification bias in the model by using nonparametric and semi-nonparametric approaches as specification checks in the model. Our simulation results show that adding ACRE revenue payments to gross revenue reduced the downside risk in revenue for corn, wheat, and soybean farmers in 2009 in the four locations examined, with reductions ranging from 4% to 25%. Integrating...
Tipo: Conference Paper or Presentation Palavras-chave: Domestic support; Average crop revenue election; Loan deficiency payments; Counter-cyclical payments; Revenue; Price; Corn; Yield; Pairs bootstrap; Kernel density; Semi-nonparametric; Combinatorial optimization; Negative exponential utility function; Agricultural and Food Policy; Demand and Price Analysis.
Ano: 2009 URL: http://purl.umn.edu/49180
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Adaptación a clima templado de poblaciones exóticas de maíz mediante selección masal visual. Colegio de Postgraduados
Gómez Espejo, Ana Luisa.
Independientemente de la eficiencia teórica de los métodos de mejoramiento, es la cantidad de variabilidad genética en las poblaciones la que determina el progreso genético obtenido por ciclo de selección; por ello, es de particular interés para todo programa de mejoramiento genético de maíz (Zea mays L.) incrementar la variabilidad genética de su germoplasma base, siendo para ello una vía la adaptación y uso de germoplasma exótico tropical o subtropical en las regiones de clima templado. En este trabajo se consideró la expresión del rendimiento de grano como indicador de la adaptación a clima templado, proponiéndose además que los genes de adaptación son dominantes sobre los de inadaptación. Así, durante los ciclos P-V 2011 y 2012, se evaluaron 48...
Palavras-chave: Zea mays L.; Adaptación; Selección masal; Rendimiento; Heterosis; Cruzas; Razas exóticas tropicales; Razas de clima templado; Adaptation; Crosses; Yield; Mass selection; Tropical exotic races; Temperate climate races; Genética; Maestría.
Ano: 2014 URL: http://hdl.handle.net/10521/2269
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Adequate timing for heart-of-palm harvesting in King palm Horticultura Brasileira
Bovi,Marilene L.A.; Saes,Luiz Alberto; Uzzo,Roberta Pierry; Spiering,Sandra H..
Heart-of-palm, palm heart, or "palmito" can be considered as a non-conventional vegetable, largely consumed in Brazil and exported to more than sixty countries. Timing of heart-of-palm harvesting is a critical issue in palmito agribusiness, since it affects yield, quality and costs. A three-year field experiment was utilized to identify the correct timing for king palm heart-of-palm harvesting, from the standpoint of maximizing yield and minimizing growing period. The experimental site was located at Pariqueraçu, Vale do Ribeira, a region where palmito agribusiness has increased recently, due to adequate climatic conditions, low costs and high industry demand. Crop was grown in 2 x 0.75 m spacing, utilizing six-month old seedlings. Growth was assessed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Archontophoenix alexandrae; Palmito; Growth; Yield; Quality.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362001000200008
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Agricultural and economic characterization of guava production in Brazil Rev. Bras. Frutic.
Vitti,Karine Alessandra; Lima,Lilian Maluf de; Martines Filho,João Gomes.
Abstract This study was designed to analyze the relationship between guava crop production variables in the Matão region of central São Paulo, Brazil, and to better understand the economic importance of this crop to its growers. Data were obtained through a questionnaire applied during interviews with guava growers and after the data collection, statistical analyzes were made using Chi-Square hypothesis tests. Analysis results indicate a distinct association between the variables variety and plant age, between variety and number of plants per hectare, andbetween number of plants per hectare and yield, while no association was found between yield and variety. The Paluma guava variety spaced seven meters by five meters apart and pruned throughout the entire...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chi-square test; Psidium guajava; Variety; Yield; Economic importance.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000100502
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Agrometeorological models for 'Valencia' and 'Hamlin' sweet oranges to estimate the number of fruits per plant Scientia Agricola
Paulino,Silvia Elisandra Pasqua; Mourão Filho,Francisco de Assis Alves; Maia,Aline de Holanda Nunes; Avilés,Tatiana Eugenia Cantuarias; Dourado Neto,Durval.
The development of models that allow forecasting yield tendencies is important to all sectors of the citrus industry. This work evaluated the influence of meteorological variables in different phases of the crop cycle in order to propose empirical models to estimate the number of fruits per plant (NFP) of 'Valencia' and 'Hamlin' sweet oranges. NFP sampling data from the citrus juice industry of the State of São Paulo, on the total of 15 harvests (1990/91 to 2004/05), classified into three age classes, and meteorological data of maximum and minimum air temperature and rainfall of Limeira, SP, Brazil, were utilized. Correlation coefficients were initially computed between the number of fruits per plant and each meteorological variable used for water balance...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus; Harvest; Modeling; Yield.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100001
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Agronomic and molecular characterization of wild germplasm Saccharum spontaneum for sugarcane and energycane breeding purposes Scientia Agricola
Silva,Jorge Alberto Gonçalves da; Costa,Paulo Mafra de Almeida; Marconi,Thiago Gibbin; Barreto,Everton Jean da Silva; Solís-Gracia,Nora; Park,Jon-Won; Glynn,Neil Charles.
ABSTRACT: Among the species related to sugarcane, Saccharum spontaneum (L.) is a wild species with the greatest potential as a source of genetic variation to cope with biomass production in harsh environments. Due to its high yield, early vigor, ratooning ability, low input requirements and tolerance to various biotic and abiotic stresses, sugarcane breeders have shown interest in its contribution, as a donor of genes, to the development of high biomass energy canes. The conservation, evaluation and utilization of the genetic variability of S. spontaneum available in germplasm collections are critical for breeding, but, given the aggressive rhizomatous growth habit and the ability to propagate via seed dispersal, S. spontaneum is classified as a noxious...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Molecular markers; Yield; Bioenergy; Abiotic stress; Core collection.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400329
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Agronomic aspects of soybean plants subjected to deficit irrigation AGRIAMBI
Nunes,Antônia C.; Bezerra,Francisco M. L.; Silva,Roberta A. e; Silva Júnior,José L. C. da; Gonçalves,Flávia B.; Santos,Geovana A..
ABSTRACT This study aimed to evaluate the behavior of soybean plants subjected to irrigation management with controlled water deficits in different phenological stages. The research was conducted in an experimental area of the Federal University of Tocantins (UFT), in Palmas-TO, Brazil. The experimental design was randomized blocks with four replicates, and treatments arranged in a split-plot scheme. The plots consisted of irrigation levels that induced plants to water deficit in the vegetative stage, reproductive stage and throughout the entire cycle, based on potential crop evapotranspiration (ETpc). The subplots corresponded to two soybean cultivars (M9144RR and TMG1288RR). The following agronomic variables were evaluated: days until flowering, days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation management; Yield; Glycine max (L.) Merril.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700654
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Agronomic Performance of Intacta RR2 Soybean Submitted to Doses of Glyphosate Planta Daninha
CESCO,V.J.S.; KRENCHINSKI,F.H.; RODRIGUES,D.M.; NARDI,R.; ALBRECHT,A.J.P.; ALBRECHT,L.P..
ABSTRACT: This study aimed at evaluating the agronomic performance of Intacta RR2 soybean submitted to the application of glyphosate doses in post-emergence. For this, two experiments were conducted in two locations (Palotina and Marechal Cândido Rondon - Paraná state). Applications were carried out with increasing rates of glyphosate (0, 720, 1,440, 2,160, 2,880, 3,600, 4,320 g a.e. ha-1), constituting seven treatments with an experimental design in randomized blocks with four replications, totaling 28 plots for each location. The cultivar used for both experiments was Monsoy 6210 Intacta RR2 IPROTM. The analyzed variables were phytotoxicity at 3, 7, 14, 21 and 28 DAA, A-B and total chlorophyll index, final height, number of pods, 100-seed weight, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Yield; Phytotoxicity; Herbicides; Transgenic soybean.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100306
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Agronomic performance of Italian zucchini as a function of phosphate fertilization AGRIAMBI
Souza,Francisco I. de; Grangeiro,Leilson C.; Souza,Valdívia de F. L. de; Gonçalvez,Francisco das C.; Oliveira,Fábio H. T. de; Jesus,Priscila M. M. de.
ABSTRACT The objective of this research was to evaluate the agronomic performance of Italian zucchini as a function of phosphate fertilization. The experiments were carried at the Rafael Fernandes Experimental Farm, Federal Rural University of the Semi-Arid Region, Mossoró, RN, Brazil, from August to November 2015 and from July to September 2016. The experimental design was randomized blocks in 2 x 5 factorial scheme, with four replicates. The treatments consisted of the combination of two cultivars (Caserta and Alícia) and five doses of phosphorus (0, 40, 78, 120 and 150 kg ha-1 of P2O5). Phosphorus doses associated with the maximum marketable yields estimated were smaller for Alícia than for Caserta in the period from August to November 2015. In the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cucurbita pepo L.; Plant nutrition; Yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300206
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Agronomic performance of lettuce subjected to green manure with different leguminous species AGRIAMBI
Sarmento,José J. A.; Santos,José J. F. dos; Costa,Caciana C.; Bomfim,Marinês P..
ABSTRACT Green manure is the practice of cultivation and incorporation of plants to the soil, mainly leguminous species, produced or not in situ, for the purpose of preserving and/or restoring soil organic matter and soil nutrients. To compare the effects of incorporating leguminous species in the pre-planting green manure on lettuce production, seven treatments were tested: mineral fertilization; crotalaria (Crotalaria juncea); cowpea (Vigna unguiculata); common bean (Phaseolus vulgaris); lablab bean (Dolichos lablab); pigeon pea (Cajanus cajan) and spontaneous plants. The treatments were arranged in the randomized blocks, with five repetitions. The experiment was conducted in the experimental area of the CCTA/UFCG, in the period from April to December...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactuca sativa; Nutrient cycling; Plant nutrition; Yield.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200114
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Agronomic performance of quinoa selected in the Brazilian Savannah PAB
Spehar,Carlos Roberto; Santos,Roberto Lorena de Barros.
Twenty six breeding lines, selected from individual plant progenies of hybrids among varieties Amarilla de Marangani, Blanca de Junín, Chewecca, Faro 4, Improved Baer, Kancolla, Real, and Salares-Roja, had their agronomic characters evaluated, in Planaltina, DF, Brazil (15º36'S and 47º12'W), 1,000 masl, in randomized complete blocks, on a Ferralsol, previously limed and fertilized. Grain yield was positively associated with plant height, inflorescence length and diameter, and plant cycle. Genetic gain can be attained by selection based in these characters for commercial production of quinoa in tropical regions.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chenopodium quinoa; Breeding line; Selection; Yield; Cerrado.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000600012
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Agronomic responses of grapevine ‘Chenin Blanc’ as a function of training systems and rootstocks Scientia Agricola
Leão,Patrícia Coelho de Souza; Chaves,Agnaldo Rodrigues de Melo.
ABSTRACT The aim of this research was to study the influence of training system and rootstock on the yield, vigor and physiology of the ‘Chenin Blanc’ grapevine at São Francisco Valley, northeastern Brazil. An experiment was carried out on eight harvests, from 2013 to 2017, in Petrolina, in the state of Pernambuco. Grapevines were grown under two training systems, lyre and espalier, and five rootstocks: ‘IAC 572’, ‘IAC 313’, ‘IAC 766’, ‘Paulsen 1103’ and ‘SO4’, using a split-plot randomized block design, with training systems assigned to the main plot and the rootstock assigned to the subplot. Lyre favored an increase in the number of bunches, branches and leaf mass in the harvest of the first semester of the year, while in the second semester there were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera; Tropical viticulture; Yield; Vigor.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000100601
Registros recuperados: 434
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