Author(s): Sudadi, Sumarno
The experiment was conducted at Field Experiment Laboratory, Faculty of Agriculture, UNS Surakarta at Jumantono, Karanganyar, Central Java, to study the application of azolla-based organic farming systems to increase rice yield on Alfisol. Three treatment factors were evaluated i.e. Dosages of azolla inoculum (0; 250 and 500 gm-2), dosages of phosphate rock (equivalent to 0%, 50%, 100% of recomendated 150 kgha-1SP- 36) and dosages of plant ash-K (equivalent to 0%, 50%, 100% of recomendated 100 kgha-1KCl). As much of 12 kg fine soil (Ø 2 mm) was mixed thoroughly with these fertilizers, put into plastic pot then incubated at 5 cm height of standing water.