1969-1973: production in grains of maize, forage sorghum, kenaf and their mixtures

Grain yield expressed in dry substance (+) (t./ha)
Pure cultivation and their mixtures 1969 1970 1971 1972 1973 5 year average
Maize 3,0 b (*) 2,9 b 8,0 a 7,7 a 6,5 a 5,9 a
Sorghum 5,2 a 5,3 a 5,2 c 7,0 ab 3,9 c 5,4 a
Kenaf 0 0 0 0 0 0
Maize - Sorghum 4,3 a 4,9 a 7,2 ab 7,5 a 5,2 ab 5,8 a
Maize - Kenaf 1,9 c 1,3 c 4,5 c 4,2 c 4,9 b 3,5 b
Sorghum - Kenaf 2,7 b 3,1 b 2,8 d 3,8 c 2,0 d 2,9 b
Maize - Sorghum - Kenaf - 3,5 b 6,7 b 6,3 b 4,7 bc 5,3
(+) Grain yields are calculated on the basis of the corn ear (grain + ear) and the sorghum panicles (panicle + 1 cm peduncle).
(*) Grain yields of the same year and their averages on 5 years that are not marked with the same letter are statistically significant for p = 0.05.

Source: "Il kenaf, non solo una nuova materia prima cellulosica" - G. Mignoni