Evaluation of Soil Drainage Methods for the Productivity of Waterlogged Vertisols in Jama District, Eastern Amhara Region, Ethiopia

Table 4

Grain yield (g/m²) and biomass (g/m²) per productive area for each growing season and the proportion of productive area to harvestable area.

Treatment	2017		2018		Combined		PA/HA
	GY	BM	GY	BM	GY	BM
BBF120	334.18	735.60	318.23	903.09	326.21	819.34	0.82
BBF80	279.46	684.95	327.61	923.03	303.53	803.99	0.73
BBF40	295.88	699.38	343.70	966.74	319.79	833.06	0.55
CV (%)	16.24	8.58	8.97	6.37	13.81	17.82	—
LSD (α = 5%)	NS	NS	NS	NS	NS	NS	—

GY: grain yield; BM: biomass; PA: productive area; NS: not significant; HA: harvestable area.