Abstract
Rice is the main food crop for Indonesians; hence, increasing population leads to expanding demand for this commodity. This research was carried out over potential acid sulfate soils of tidal swamplands in Matang Danau village, Sambas regency, West Kalimantan during 2018 Dry Season. The aim of the research was to evaluate grain yields and the variability of ten rice varieties. The study employed completely randomized block design with three replications. Ten rice varieties, namely Inpara 1, Inpara 2, Inpara 3, Inpara 4, Inpara 6, Inpara 8, Inpara 9, Margasari, Inpari 32 and Cillosari (as control) were investigated. The results showed that all varieties performed good phenotypic acceptabilily (score 3), without symptoms of Fe toxicity. Yielded grain ranged from 2.44 to 5.39 tons/ha in dry milled grain. The highest yield was shown by Inpari 32 (5.33 t/ha) and Inpara 1 (5.39 t/ha), suggesting that these varieties suit acid sulfate soils as an alternative to existing Cilosari cultivar.
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