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Air-assisted boom sprayer and spray deposition on bean plants Scientia Agricola
Bauer,Fernando Cesar; Raetano,Carlos Gilberto.
The development of safe pesticide application techniques with low volume rates, frequency and spray drift, along with the need to obtain better control level of crop pest control levels, justify the air-assistance in boom sprayers. The aim of this research was to evaluate the spray deposition on bean plants with different nozzles and volume rates by air-assisted and non-assisted sprayers. A completely randomized experiment was carried out using copper oxide as a tracer (50% metalic copper) for deposit evaluation. The artificial targets were fixed on the upper and under-side of the leaflets, at the top and lower third of the same plants under the spray boom. After application, targets were washed individually with an extracting solution of nitric acid (1.0...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Application technique; Tracer; Boom sprayer.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200002
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Yield response to fertilization strategies in no-tillage soybean, corn and common bean crops BABT
Pauletti,Volnei; Serrat,Beatriz Monte; Motta,Antonio Carlos Vargas; Favaretto,Nerilde; Anjos,Adilson dos.
Two research fields were conducted on a Haplohumox from 1998 and to 2005. The study aimed to evaluate the strategies for starter fertilizer application on corn, soybean and common bean yield as well as the accumulation of earlier dry matter for corn in a no-tillage crop rotation system in south of Brazil. There was no increase in the yield of soybean with phosphorus and potassium application for at least seven seasons, while corn and common bean showed increased yields with phosphorus, potassium and nitrogen application. For soybean, corn and common beans in no-tillage systems with high levels of phosphorus and medium of potassium, the starter fertilizer can be applied in any of the methods evaluated and in any of the period considered. The presence or...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Starter fertilizer; Application technique; Fertilizer management; Crop rotation; No-till.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300009
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