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Branches of Gliricidia sepium used as mulch for weed control in corn Rev. Ciênc. Agron.
Santos,Luiz Eduardo Barreto dos; Silva,Paulo Sérgio Lima e; Oliveira,Vianney Reinaldo de; Oliveira,Antonia Kennia de.
ABSTRACT Mulching using crop residue reduces the growth of weeds and increases the yield of various crops. The aim of the present study was to evaluate the effects of Gliricidia sepium branches, used as mulch, on weed control, and on grain yield in corn. A randomized block design was used, with split plots and five replications. The cultivars, 30F35H and AG 1051, were grown in the plots, and the following treatments applied in the subplots: no weeding, two weedings, and mulching with 10, 20 or 30 t ha-1 (fresh weight) gliricidia branches. The mulch material was applied between the sowing furrows after sowing the corn. Increasing the amount of gliricidia branches caused a linear reduction in weed growth, and increased growth and yield in the corn. Weed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Number of branches; Corn yield; Weed growth; Hoeings.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100417
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Sample size and sampling method for evaluation of characteristics of the sunflower1 Rev. Ciênc. Agron.
Silva,Paulo Sérgio Lima e; Santos,Luiz Eduardo Barreto dos; Oliveira,Vianney Reinado de; Sousa,Roberto Pequeno de; Fernandes,Patrícia Lianny de Oliveira.
In the sunflower, in addition to seed yield, it is of interest to evaluate number of leaves plant-1, head diameter, stem diameter and plant height, since these characteristics may be associated with seed yield or lodging. The objective of the work was to determine the optimal sample size (from which the experimental coefficient of variation, CV, can be established) for evaluation of these four characteristics. Fifteen cultivars were evaluated in an experimental design of randomized blocks with ten replications. The characteristics were evaluated using two sampling methods (in a single row of plants or in the two rows from the useable area of each plot) and sample sizes of from two to 18 sampling units, with an interval of two plants. In the two sampling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L.; Plant height; Leaf number; Stem diameter; Head diameter.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100144
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