Table 1 Summary of structured and semi-structured questions

Structured Survey of Farming Households (Questionnaire)

Frequency of planting sergegna teff

Farmer’s plan to plant sergegna teff in the future

Reason for planting sergegna teff

Season and Time of planting and harvest sergegna teff

Soil type recommended for planting sergegna teff

Application of fertilizer to [sergegna teff]? Types of fertilizer used?

Rotation of sergegna teff with other field crops? Crops rotated

Use of irrigation for sergegna teff?

Foods prepared with sergegna teff

Marketing of sergegna teff, market value of sergegna teff compared with its components as mono crops

Semi-Structured Interview of Key informants (Knowledgeable farmers or farmer experts)

Reasons for growing sergegna teff

Place of usual planting [sergegna teff] and reasons and reasons why do they plant it there?

Soil type that preferred to plant [sergegna teff] and reason why they select?

Comparison of [sergegna teff] to [teff varieties] in terms of its yield? Does it tend to have higher or lower yields than [teff varieties] planted separately? Reasons

Comparison of [sergegna teff] to [teff varieties] in terms of its yield stability? Does it more reliably produce grain when the weather is unusually dry or there is too much rain?

Comparison of [sergegna teff] to [teff varieties] in terms of its susceptibility to weeds, disease resistance, insect pest tolerance? Would you say it usually requires more or less weeding than [teff varieties] planted separately? Why?

Comparison of [sergegna teff] to [teff varieties] in terms of its disease resistance? Would you say it is more or less likely to be affected by disease than [teff varieties] planted separately? Why?

Comparison of [sergegna teff] to [teff varieties] in terms of foods prepared? Taste? Nutrition status?

Different about the way to harvest [sergegna teff] compared to the way to harvest [teff varieties] when you plant them separately?

Use the residues of [sergegna teff] for fodder? How does it compare to [teff varieties] used separately? Are there any other uses for the residues of [sergegna teff]?