Abstract
One of the major problems in comparing the yield response of rice to N added as an Azolla green manure is that it is difficult to apply an exact amount of N as fresh Azolla. This is due to the fact that the % dry weight and % N of the fresh Azolla biomass tends to vary from day to day and with the method of draining excess water. An exact amount of N as Azolla can be applied if the material is first air or oven-dried. However, the result of Kumarasinghe et al. (1986) indicate that drying reduces the N availability from Azolla by 30%.
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© 1993 Springer Science+Business Media Dordrecht
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Kumarasinghe, K.S., Eskew, D.L. (1993). Effects of urea and Azolla on N uptake and yield of rice. In: Kumarasinghe, K.S., Eskew, D.L. (eds) Isotopic Studies of Azolla and Nitrogen Fertilization of Rice. Developments in Plant and Soil Sciences, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1681-7_5
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DOI: https://doi.org/10.1007/978-94-011-1681-7_5
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4735-7
Online ISBN: 978-94-011-1681-7
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