Effect of hill density, seedling number/hill, and potassium on late-transplanted sali (rainfed lowland winter) rice yield in Assam, India

abonos potasicos assam cultivo de temporal culture pluviale date de semis engrais potassique espacement espaciamiento fecha de siembra lowland oryza sativa plant population plantule potash fertilizers rainfed farming rendement rendimiento seedlings sowing date spacing tierras bajas yields