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| Cunha,Paulo C. R. da; Silveira,Pedro M. da; Nascimento,Jorge L. do; Alves Júnior,José. |
| Este trabalho foi desenvolvido com objetivo de se avaliar três formas de manejar a irrigação do feijoeiro. A cultivar de feijão preto BRS Supremo foi submetida ao manejo da irrigação por tensiometria, tanque Classe A e Penman-Monteith. Avaliaram-se a produtividade de grãos, número de vagens por planta, número de grãos por vagem, massa de 100 grãos, altura da planta, lâmina total e eficiência de uso da água. O método do tanque propiciou a maior lâmina acumulada e a maior frequência de irrigação. A lâmina total estimada por tensiometria foi 29,7 e 17,8% menor que a estimada pelos métodos do tanque e de Penman-Monteith, respectivamente. Houve diferenças significativas quanto à produtividade de grãos, número de grãos por vagem e altura da planta. O método do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Necessidades hídricas; Tanque Classe A; Penman-Monteith. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000700007 |
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| Mendes,Walter da C.; Alves Júnior,José; Cunha,Paulo C. R. da; Silva,Anderson R. da; Evangelista,Adão W. P.; Casaroli,Derblai. |
| ABSTRACT Potassium (K) can be easily lost by the leaching process. The objective of this study was to quantify K leaching in clayey and sandy soils under increasing irrigation depths. The experiment was conducted in 2014, in a protected environment, after extraction of undisturbed soil columns, with diameter of 144 mm and height of 300 mm. The columns were arranged in a randomized complete block in a factorial design with three replicates, corresponding to eight treatments: two soil types and four water depths, equivalent to 50, 100, 150 and 200% of the amount of water necessary to bring the soil moisture to field capacity. Potassium chloride, with 58% of K2O, was used as K source. Water replacement in the columns was performed every three days, for a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Soil texture; Nutrient loss; Water management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001100972 |
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| Silva,Flavio H. da; Cunha,Paulo C. R. da; Almeida,André C. de S.; Araújo,Lucas da S.; Jakelaitis,Adriano; Silveira,Pedro M. da. |
| ABSTRACT High corn yields in high-tech systems are related to proper crop implementation. This study aimed to evaluate the effects of variability in the distribution of seeds along the planting row on corn production components. The study was conducted under Cerrado conditions in the municipality of Urutaí, GO, Brazil. The experimental design was randomized blocks in a 5 x 2 factorial scheme, with four replicates. The effects of five coefficients of variation (0, 20, 40, 60 and 80%) of non-uniformity in the spatial distribution of seeds along the planting row of two corn hybrids (P30F53HX and P3646HX) were evaluated. No interactions were observed for the analysed corn variables. However, as the non-uniformity in seed distribution along the planting row... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of variation; Grain yield; Non-uniformity; Zea mays. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201172 |
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