Search Results - "Carlos Roberto Spehar"
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Adaptability of quinoa genotypes to altitudes and population densities in Colombia
Published in Bioscience journal (01-11-2020)“…This work aimed at evaluating and comparing agronomic characteristics of 15 quinoa (Chenopodium quinoa Willd) genotypes cultivated in two altitudes and sowing…”
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2
Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility
Published in Ciência e agrotecnologia (01-04-2016)“…ABSTRACT High nitrogen losses by ammonia volatilization are expected when urea is used as the source of N. The use of controlled-release urea and urease…”
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3
Solubility and availability of micronutrients extracted from silicate agrominerals
Published in Pesquisa agropecuaria brasileira (01-01-2020)“…The objective of this work was to evaluate the solubility of the micronutrients copper, nickel, and zinc, chemically extracted from silicate agrominerals, as…”
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4
Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard
Published in Ciência e agrotecnologia (01-04-2016)“…ABSTRACT Ammonia volatilization (N-NH3) is one of the main pathways of Nitrogen loss reducing nitrogen use efficiency in coffee orchard. This work aimed at…”
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Exploiting genotypic variability from low-altitude Brazilian Savannah-adapted Chenopodium quinoa
Published in Euphytica (01-09-2010)“…Saponin-free quinoa genotypes were evaluated in summer and autumn-winter sowings, for phenotypic traits and yield stability. They were obtained by single…”
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Characterization and nutrient release from silicate rocks and influence on chemical changes in soil
Published in Revista Brasileira de Ciência do Solo (01-06-2012)“…The expansion of Brazilian agriculture has led to a heavy dependence on imported fertilizers to ensure the supply of the growing food demand. This fact has…”
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Quinoa (Chenopodium quinoa) reaction to herbicide residue in a brazilian savannah soil
Published in Pesquisa agropecuaria brasileira (01-06-2003)“…The quinoa (Chenopodium quinoa Willd.) cultivation, one of the most promising in double cropping with soybeans or maize, depends on weed control. The objective…”
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Deveria o Brasil investir em novos grãos para a sua alimentação? A proposta do amaranto (Amaranthus SP)
Published in Revista Segurança Alimentar e Nutricional (Online) (03-02-2015)“…O gênero Amaranthus compreende várias espécies de plantas dicotiledôneas cujas folhas e sementes são regularmente consumidas como alimento em diversos países,…”
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Caracterização agronômica de amaranto para cultivo na entressafra no Cerrado
Published in Pesquisa agropecuaria brasileira (2003)“…O objetivo deste trabalho foi caracterizar e avaliar 48 acessos de três espécies de amaranto (Amaranthus caudatus L., A. cruentus L.,e A. hypochondriacus L.)…”
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Desempenho agronômico de espécies tradicionais e inovadoras da agricultura em semeadura de sucessão e entressafra no cerrado do planalto central brasileiro
Published in Bioscience journal (01-02-2011)“…Avaliou-se o desempenho agronômico de sorgo, milho, milhetos, aveia preta, trigo, cevada, braquiária, nabo forrageiro, amaranto, quinoa, kenaf, gergelim,…”
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11
Agronomic performance of quinoa selected in the Brazilian Savannah
Published in Pesquisa agropecuaria brasileira (01-06-2005)“…Twenty six breeding lines, selected from individual plant progenies of hybrids among varieties Amarilla de Marangani, Blanca de Junín, Chewecca, Faro 4,…”
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Efeito da densidade de semeadura e doses de nitrogênio sobre a produtividade e biometria de amaranto, no cerrado do planalto central
Published in Bioscience journal (01-10-2014)“…O amaranto é uma granífera com características de crescimento, estabelecimento e produção promissoras e com grande potencial para um aumento do seu cultivo…”
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13
Hybridization between progenies and agronomic characterization of the F2 generation in quinoa
Published in Crop breeding and applied biotechnology (2023)“…Quinoa is a self-pollinating species with very small flowers, which hinders efficiency in crossbreeding. Therefore, developing an efficient crossbreeding…”
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Adaptability of quinoa genotypes to altitudes and population densities in Colombia
Published in Bioscience journal (01-12-2020)“…This work aimed at evaluating and comparing agronomic characteristics of 15 quinoa (Chenopodium quinoa Willd) genotypes cultivated in two altitudes and sowing…”
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15
Amaranto BRS Alegria: alternativa para diversificar os sistemas de produção
Published in Pesquisa agropecuaria brasileira (01-05-2003)“…A diversificação do sistema produtivo depende de espécies com rápido crescimento, tolerância ao déficit hídrico, produção de biomassa, ciclagem de nutrientes e…”
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16
Análise de imagem para determinação do teor de saponina em quinoa
Published in Pesquisa agropecuaria brasileira (2004)“…Um grupo de sementes lavadas e 35 acessos de quinoa (Chenopodium quinoa Willd) foram avaliados pelo método de coluna de espuma e sua coloração foi decomposta…”
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17
Genetic parameters and morpho‐agronomic characterization of barley in the Brazilian Savannah
Published in Journal of the Institute of Brewing (01-04-2018)“…There is a growing demand for malting barley in the world and the supply relies on introducing the crop into new agricultural regions, such as the Brazilian…”
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18
Agronomic efficiency of potassium fertilization in lettuce fertilized with alternative nutrient sources
Published in Ciência agronômica (01-06-2013)“…The aim of this study was to evaluate the effect of alternative sources of nutrients on the nutrition, yield and efficiency of potassium fertilization in…”
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19
Produtividade e qualidade da forragemde trigo-mourisco (Fagopyrum esculentum Moench) e de milheto (Pennisetum glaucum (L.) R.BR)
Published in Revista brasileira de saúde e produção animal (01-12-2016)“…RESUMO Objetivou-se com este trabalho comparar o valor forrageiro do milheto e trigo-mourisco, sob irrigação, em diferentes idades de corte. Utilizou-se…”
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Quinoa BRS Piabiru: alternativa para diversificar os sistemas de produção de grãos
Published in Pesquisa agropecuaria brasileira (01-06-2002)“…A diversificação da agricultura possibilita implementar a renda, reduzir custos, disponibilizar nutrientes, proteger o solo, reduzir impacto ambiental negativo…”
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