A field experiment was carried out at Bangladesh Agricultural University farm, during Boro season of 1987-1988 to evaluate Azolla manuring and urea application on soil fertility in the rice field. The pH of the soil remained more or less unaffected under various treatments. Organic matter content of the soil was increased by 7.6, 9.7, 10.3, 10.8 and 1.6% with azolla dual culture, azolla once, twice, thrice incorporation and urea application over control respectively. Total nitrogen, and available phosphorus increased significantly due to azolla manuring and urea application but azolla manuring produced better result than urea application. Among the treatments, the azolla thrice incorporation in the soil can be regraded as the superior treatment in respect of improving soil fertility. The results also indicated that exchangeable K and available S were not significantly influenced under various treatments. Azolla dual culture in the rice field showed minimum benefit than other azolla treatments.
|Journal||Society for Recent Development in Agriculture|
|Publication status||Published - 1990|