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| Registros recuperados: 17 | |
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| Rodrigues, M.A.; Coutinho, João; Martins, F.. |
| The study was conducted over a 4 year period with the purpose of measuring N mineralization using an in situ incubation technique, following the application of farmyard manure, poultry manure or municipal solid waste. The results varied from –10 % (net immobilization) to +28 % (net mineralization) in relation to the total organic N applied. N fluxes were assessed through plant N analysis during the growing season and through determination of potato tuber dry weight (TDW), N uptake by tubers and the apparent N recovery (ANR) of added N at harvest. Organic material applications slightly increased TDW above the control treatment (9 to 25%), although the results indicate a shortage of N, where no N was added to the crop. The effect of organic fertilization on... |
| Tipo: Article |
Palavras-chave: Farmyard manure; Municipal solid waste; Poultry manure; Nitrogen mineralization; Nitrogen uptake; Solanum tuberosum L.. |
| Ano: 2001 |
URL: http://hdl.handle.net/10198/2205 |
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| Kajisa, Kei; Palanichamy, N. Venkatesa. |
| Attention to organic fertilizer has been increasing but opinions are mixed as to its impacts. This paper explores the potential and limitations of the use of farmyard manure (FYM) for paddy and upland cereals under different soil conditions in Tamil Nadu, India, using farming households’ three-year rotating panel data from 1993 to 2003. Estimated yield functions reveal that a direct impact of FYM application exists only for upland cereals but not for paddy. Meanwhile, an indirect impact through an increase in the marginal product of chemical fertilizer is observed for both paddy and upland cereals, especially under low inherent soil fertility status. Reflecting the existence of the benefit of FYM application, our factor demand estimation shows that farmers... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Rice; Upland cereals; Farmyard manure; Dairy sector.; Production Economics. |
| Ano: 2009 |
URL: http://purl.umn.edu/51291 |
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| Registros recuperados: 17 | |
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