Plate 4: The Frafra potatoes three months after planting.

(DOCX)</p

Soil structure, chemical reaction, and nutrient content of the study site.

Soil structure, chemical reaction, and nutrient content of the study site.</p

Mean values of the growth and yield parameters of frafra potato varieties.

Mean values of the growth and yield parameters of frafra potato varieties.</p

a: Mean correlation of growth parameters to each other and to crop yield.

b: Correlation of growth parameters to each other and to yield in the varieties.</p

Plate 2: The Frafra potatoes five weeks after planting.

(DOCX)</p

Fig 2 -

a: Relationship between rainfall and leaf expansion in frafra potato. b: Relationship between rainfall and plant height in frafra potato. c: Rainfall and vine production in frafra potato. d: Rainfall and plant canopy spread in frafra potato. e: Tuber mass production in frafra potato. LV = Local variety, ML = Maa-Lana, MM = Manga-Moya, NP = Nutsuga Peisa, NT = Nachim–Tiir, WP = WAAP Peisa.</p

Plate 5: The Frafra potatoes at maturity.

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A map of bolgatanga municipal showing Bolgatanga Technical University located in Sumbrungu Kologo Akasingo.

Source: Ghana Statistical Service.</p

Plate 3: The Frafra potatoes seven weeks after planting.

(DOCX)</p

Plate 1: Tracing the outline of a leaf on a graph to estimate its area.

(DOCX)</p