has subject area Azolla Oryza sativa Poaceae agronomy agronomy azolla biology biology crop field experiment green manure oryza sativa plant sciences poaceae rice sowing sowing spacing transplanting
Digital Object Identifier (DOI) 10.1111/J.1439-037X.1988.TB00328.X 10.1111/j.1439-037X.1988.tb00328.x