Titlebook: Isotopic Studies of Azolla and Nitrogen Fertilization of Rice; Report of an FAO/IAE K. S. Kumarasinghe,D. L. Eskew Book 1993 Kluwer Academi

arrhythmic

invulnerable

eficiencies. Indeed, 50% of the increase in rice yieldsafter World War II can be attributed to increased fertilizer nitrogenuse. Although an increased rate of fertilizer nitrogen application hasbeen advocated to meet the growing demand for food, it is unrealisticto advise the farmers to apply fertil

Left-Atrium

Commodious

forbid

Nitrogen balance studies in ,/rice cropping systems,tilizer N occur under flooded conditions, there is however, little information on the fate of the N which is not recovered by the crop. The primary objective of this experiment is therefore to obtain information on the fate of N which is not taken up by the rice plants.

Frequency

Insubordinate

Basilar-Artery

轎車

強(qiáng)化

Residual effects of , N to a second crop of rice or wheat,t et al., 1979). Watanabe et al. (1989) reported that losses of .N labelled N after a rice crop was higher from .N labelled urea (20%–30%) than from .N labelled . (0%–11%). Consequently more residual N is expected to be left in the soil following treatment with . than with chemical fertilizers.