| dc.creator | BEDMAR, F. | |
| dc.creator | MANETTI, P. | |
| dc.creator | MONTERUBBIANESI, G. | |
| dc.date | 2011-04-09T11:44:10Z | |
| dc.date | 2011-04-09T11:44:10Z | |
| dc.date | 1999 | |
| dc.date | 1999-04-08 | |
| dc.date.accessioned | 2017-03-06T19:22:12Z | |
| dc.date.available | 2017-03-06T19:22:12Z | |
| dc.identifier | 5303 | |
| dc.identifier | http://www.alice.cnptia.embrapa.br/handle/doc/88836 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/263521 | |
| dc.description | Field studies were conducted over 3 years in southeast Buenos Aires, Argentina, to determine the critical period fo weed control in maize (Zea mays L.). The treatment consisted of two different periods of weed interference, a critical weed-free period, and a critical time of weed removal. The Gompertz and logistic equations were fitted to relative yields representing the critical weed-free and the critical time of weed removal, respectively. Accumulated thermal units were used to describe each period of weed-free or weed removal. The critical weed-free period and the critical time of weed removal ranged from 222 to 416 and 128 to 261 accumulated thermal units respectively, to prevent yield losses of 2.5%. Weed biomass proved to be inverse t the crop yield for all the years studied. When weeds competed with the crop from emergence, a large increase in weed biomass was achieved 10 days after crop emergence. However, few weed seedling emerged and prospered after the 5-6 leaf maize stage (10-20 days after emergence) | |
| dc.description | 1999 | |
| dc.language | en | |
| dc.publisher | Pesquisa Agropecuaria Brasileira, Brasilia, v.34, n.2, p.187-93, fev. 1999. | |
| dc.relation | Área de Informação da Sede - Artigo em periódico indexado (ALICE) | |
| dc.subject | Weed interference | |
| dc.subject | Weed management | |
| dc.subject | Accumulated thermal units | |
| dc.subject | Nonlinear regression | |
| dc.subject | Interferencia de plantas daninhas | |
| dc.subject | Manejo de plantas daninhas | |
| dc.subject | Unidades termicas acumuladas | |
| dc.subject | Regressao nao-linear | |
| dc.title | Determination of the critical period of weed control in corn using a thermal basis. | |
| dc.type | Artículos de revistas | |
