Adubação nitrogenada na cana-de-açúcar
Source of nitrogen for sugar cane preliminary results
R. Alvarez; A. L. Segalla; R. A. Catani (* (* ) Atualmente na Escola Superior de Agricultura "Luiz de Queiroz", em Piracicaba. )
SUMMARY
Four levels of nitrogen, 0, 30, 60 and 90 kg to the hectare, were compared regarding five different fertilizers, as castor oil bean meal, hoof and horn meal, ammonium sulphate, calcium cyanamide and urea, when a single rate of PK was applied at planting time.
Two trials were conducted, one in "massape-salmourao" soil and the other in "terra-roxa-misturada" type.
It has been found that when fertilizers are applied in furrows at planting time, the effects of castor oil meal and hoof and horn meal were the same. They were better, however, than the effect of urea, ammonium sulphate and calcium cyanamide.
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Recebido para publicação em 26 de agôsto de 1957.
Datas de Publicação
-
Publicação nesta coleção
10 Maio 2010 -
Data do Fascículo
1957
