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| Negrini,Ana Clarissa A; Melo,Paulo César T de; Ambrosano,Edmilson José; Sakai,Rogério Haruo; Schammass,Eliana Aparecida; Rossi,Fabrício. |
| The performance of lettuce in sole and intercropped with green manures was assessed under different establishment times. The lettuce fresh and dry weight, number of leaves per plant, diameter and length of head, and fresh and dry weight of green manure were evaluated. The intercropping design was additive and both cash and cover crops were planted in rows. The experimental design was of randomized complete blocks in split plot scheme, with six replicates. The plots represented the green manure sowing days (0, 20, 40 and 60 before transplanting of lettuce), and the sub-plots were assigned by cropping systems (lettuce in sole crop and intercropped with black oat, cowpea or white lupin). Simultaneous planting in the intercropping did not affect the lettuce... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Lactuca sativa; Lupinus albus; Vigna unguiculata; Polycultures. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000100011 |
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| Zotarelli,Lincoln; Cardoso,Eduardo Garcia; Piccinin,Jorge Luiz; Urquiaga,Segundo; Boddey,Robert Michael; Torres,Eleno; Alves,Bruno José Rodrigues. |
| O objetivo deste trabalho foi calibrar o medidor de clorofila Minolta SPAD-502 para avaliação da nutrição nitrogenada das plantas de milho, baseando-se na prévia comparação das leituras de clorofila com os teores obtidos pelos extratores N,N-dimetilformamida (DMF) e acetona 80%. No campo, foram avaliados os teores de clorofila em folhas de milho cultivado sob plantio direto após a cultura de aveia-preta e após a de tremoço-branco, por duas safras consecutivas. A extração da clorofila com a solução DMF, por 72 horas, foi a mais indicada para a calibração do medidor de clorofila SPAD502 na cultura do milho. O ajuste do modelo linear expressou melhor a relação entre o conteúdo de clorofila e as leituras do SPAD na cultura do milho, e seu uso produziu... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Lupinus albus; Adubo verde; Estado nutricional. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000900014 |
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| Favarato,L.F.; Galvão,J.C.C.; Souza,J.L.; Guarçoni,R.C.; Souza,C.M.; Cunha,D.N.. |
| Currently, one of the biggest challenges faced by organic no-tillage farming is weed control. Thus, the use of cropping practices that help in the control of weeds is extremely important. The objective of this study was to evaluate population density and level of weed infestation in an organic no-tillage corn cropping system under different soil covers. The experiment was conducted in a randomized block design with six repetitions and five treatments, consisting of three soil covers in an organic no-tillage system, and an organic and a conventional system, both without soil cover. The treatments with soil cover used a grass species represented by the black oat, a leguminous species represented by the white lupine, and intercropping between both species.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Lupinus albus; Straw; Organic farming. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400008 |
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