Low soil fertility status is a dominant challenge in Ethiopian agriculture for decades. Organic amendment from different sources could help to rebuild the soil fertility status of the country. Hence, an experiment was conducted to evaluate the outcome of organic treatment and preceding crops on growth and biomass yield of clover. Four levels of organic treatments (V1= 0 t ha -1 FYM; V2 = 5 t ha -1 FYM; V3 = 2.5 t ha -1 FSB and V4 = 5 t ha -1 FYM +2.5 t ha -1 FSB) and two levels of crop rotation patterns (R1 = wheat -clover and R 2 = potato-clover) were factorially arranged and laid out in a completely randomized block design (RCBD) with four replications. Plant height, number of tillers plant -1 , number of nodules plant -1 , root biomass plant -1 and above ground biomass of clover was recorded and analyzed using SAS system. The overall experimental results showed that only the main effect of organic amendment had a significant effect on the growth and biomass yield of clover. The highest total dry biomass (5.6 t ha -1 ) of clover was recorded at 5 t ha -1 FYM +2.5 t ha -1 FSB. The unfertilized control gave the lowest mean dry biomass (3.06 t ha FSB could be recommended for better biomass yield of clover. The finding could bridge the chronic green manure and livestock feed shortage of the district.
Lack of sustainable soil fertility management system is a critical challenge in the highlands of Awi Zone. Important physicochemical properties of the soil are below the critical level to support crop growth. Hence, a study was undertaken with the aim of improving the yield of potato through organic treatments and sound crop rotation system. Two rotation systems and four levels of organic treatments were factorially arranged and laid out in RCBD with four replications. The organic treatments were: V1 = 0 t/ha farmyards manure (FYM); V2 = 2.5 t/h fresh sesbania green manure (FSB) V3 = 5 t/ha FYM; and V4 = 5 t/ha FYM +2.5 t/ha FSB applied in fixed plots for three years. Indeed, the rotation systems varied from year to year to estimate the changes in potato tuber yields due to the differences in crop rotation systems. Tuber yields of potato showed increasing trend over the period of the three years with the lowest in the first year, intermediate in the second year and the highest in the third year across all treatments. Among all, the highest total potato tuber yield (35.15 t/ha) was obtained at the combined application of 5 t/ha FYM +2.5 t/ha FSB and clover-wheat-potato rotation system in the third year. The treatment combination increased total potato tuber yield by 140% and 41% over that of the first and the second years and would be recommended as ecologically sound option in improving the productivity of potato.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.