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| Registros recuperados: 31 | |
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| Lacerda, Mábio Chrisley; Nascente, Adriano Stephan. |
| This study aimed to evaluate the effect of row spacing and nitrogen topdressing fertilization of two materials (genotype 07SEQCL441 CL and cultivar BRS Esmeralda) on the plant height, yield components, grain yield, and quality of an upland rice crop grown in a no-tillage system. Trials were conducted for two growing seasons under field conditions in a 3 x 4 factorial, randomized, complete block design, with four replications. For each material, treatments consisted of the combination of row spacing (0.225, 0.35, and 0.45 m) with nitrogen (N) applied as topdressing (0, 50, 100, and 150 kg ha-1). The lowest row spacing (0.225 m) for genotypes 07SEQCL441 CL and BRS Esmeralda provided a higher number of tillers, number of panicles m-2, and grain yield of rice.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Fitotecnia; Cultivares Oryza sativa L.; Nitrogen; Plant population; NTS; Cerrado fitotecnia. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30855 |
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| Zárate, Néstor Antonio Heredia; UFGD; Vieira, Maria do Carmo; UFGD; Rech, Jerusa; UFGD; Graciano, João Dimas; UFGD; Gomes, Hellen Elaine; UFGD; Pontim, Bruno Cezar Álvaro; UFGD. |
| O trabalho teve como objetivo conhecer a produtividade, a renda bruta e a renda bruta menos o custo das sementes da beterraba ‘Tall Top Early Wonder’, em resposta ao uso de quatro e cinco fileiras no canteiro e dos espaçamentos de 5,0; 7,5 e 10,0 cm entre plantas. A colheita foi realizada aos 116 dias após a semeadura, quando se avaliaram a altura das plantas, a massa fresca das folhas, o diâmetro e o comprimento das raízes e as massas frescas de raízes comerciais e não- comerciais. A validação do trabalho foi realizada pela determinação das rendas bruta e da rendas bruta menos o custo das sementes obtidas por hectare cultivado. Nenhuma das características avaliadas foi influenciada significativamente pela interação número de fileiras no canteiro e... |
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Palavras-chave: 5.01.00.00-9 Agronomia Beta vulgaris L.; População de plantas; Renda 5.01.03.00-8 Fitotecnia Beta vulgaris L.; Plant population; Income. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3550 |
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| Sangoi,Luís. |
| Maize is the agronomic grass species that is most sensitive to variations in plant density. For each production system, there is a population that maximizes grain yield. This article presents an overview of the factors that affect optimum plant population, emphasizingthe effects of dense stands on ear development and discussing important changes in plant traits that have contributed to increase the tolerance of modern hybrids to high plant densities. Population for maize maximum economic grain yield varies from 30,000 to over 90,000pl.ha-1, depending on water availability, soil fertility, maturity rating, planting date and row spacing. When the number of individuals per area is increased beyond the optimum plant density, there is a series of consequences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Plant population; Crowding; Barrenness. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000100027 |
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| Farias,Marcelo S. de; Dagios,Ravel F.; Santi,Antônio L.; Cherubin,Maurício R.. |
| ABSTRACT The automatic control of section shut-off in seed drills minimizes seeding overlap and can reduce productivity losses, especially in responsive crops such as corn. In that context, this study evaluated the effect of sowing overlap on the grain yield and productivity of three corn hybrids. A DB-50 precision seed drill, with 33 rows equipped with a 16-row automatic section control, was used in this experiment. A randomized block design was applied to test three corn hybrids under two sowing conditions (without sowing overlap - WOSO; and with sowing overlap - WSO), with four replications. The analyzed variables were the number of plants per hectare, the number of cobs per hectare, cob length, the number of grains per cob, the thousand grain weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Precision agriculture; Section control; Plant population. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400489 |
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| MELO,T.S.; MAKINO,P.A.; CECCON,G.. |
| ABSTRACT: Composition and level of weed infestation interfere with crop yield and increase production costs. This study aimed to identify weed composition and infestation in corn grown with different plant populations, single, and intercropped with palisade grass. The phytosociological method was used to evaluate density, frequency, dominance, and infestation level of weeds in single and intercropped corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high plant population in Dourados, MS, Brazil. Commelina benghalensis, Echinochloaspp., and Euphorbia heterophylla were the species most found in the treatments. Single corn with higher plant population decreased weed occurrence. Treatments with palisade grass under a reduced spacing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Urochloa; Plant population; Phytosociology; Diversity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100199 |
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| Corrêa,Rafael D. G.; Furlani,Carlos E. A.; Zerbato,Cristiano; Oliveira,Danilo T. de; Noronha,Rafael H. de F.; Warikoda,Newton K.. |
| ABSTRACT Among the factors that may influence corn yield are sowing operation direction and plant population, since they alter the shade index between crop rows, and consequently the efficiency of interception of the photosynthetically active radiation by the leaves of plants. The aim of this study was to evaluate the influence of sowing direction and plant populations on P2830VYH hybrid corn yield. The experiment was conducted at the facilities of FCAV-UNESP, latitude 21º 14’ S and longitude 48º 16’ W in Jaboticabal (SP). The treatments were composed of three sowing directions (North-South, Northeast-Southwest, and East-West) and three population densities (40,000, 60,000 and 80,000 plants ha-1). The treatment with 80,000 plants ha-1 had the lowest cost... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Sowing configuration; Plant population; Grain yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300183 |
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| Alarcón,Daniela; Ortega,Fernando; Perich,Fernando; Fernando,Pardo; Parra,Leonardo; Quiroz,Andrés. |
| Red clover (Trifolium pratense L.) is a valuable forage legume grown alone or in mixture with grasses in temperate regions of the world. Red clover is adapted to a wide range of soil types, pH levels, environmental and management conditions. However, the main limitation of this species is the lack of persistence related to the high mortality of plants. In Chile the main biotic factor affecting survival of plants is the root borer Hylastinus obscurus (Marsham) (Coleóptera; Scolytidae). In 1989, a red clover (T. pratense L.) breeding program was started at Carillanca Research Center of the Institute of Agricultural Research (INIA), Chile, with the main objectives of improving the survival of plants, forage yield and persistence. In 2002 a research line to... |
| Tipo: Journal article |
Palavras-chave: Hylastinus obscurus; Red clover; Plant population; Breeding; Dry matter yield. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000200003 |
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| Registros recuperados: 31 | |
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