EFFECTS OF NITROGEN AND SPACING ON THE GROWTH AND YIELD OF POTATO (Solarium tuberOSUM I.)
EFFECTS OF NITROGEN AND SPACING ON THE GROWTH AND YIELD OF POTATO (Solarium tuberOSUM I.)
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Date
1985-12
Authors
MBAH, BEATRICE ANIN
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Abstract
Data are reported from an experiment conducted under
rain conditions in 1984 at the University Farm of
Ahmadu Bello University, Samaru, Zaria, to study the effect
of nitrogen and spacing. on the growth and yield of potato
(Solanum tuberosum L.).
Three levels of nitrogen (0, 60 and 120 kgN/ha),
three plant spacings (20, 30 and 40cm) and two potato
varieties (B9462-1 and BR3-18) were used. Results
revealed that nitrogen remarkably increased the number
of leaves, axillary branches, stems, stolons and tubers,
plant height, leaf,:stem and tuber dry weights, leaf area
index and tie assimi rate. It also increased the
total yield and the proportion of tubers of size greater
than 40mm and less than 40mm diameter. Spacing had no
visible effect on the number of leaves, plant height,
dry matter and percent; crude protein. Leaf stem and
tuber dry weights were increased by increasing spacing
between plants. The leaf area index, total yield, number
of tubers per unit area, yield of tubers falling into the
two grades considered were increased by close spacing.
The yield of the two varieties, differed markedly,
variety B9462-1 yielding about twice as much as variety
BR63-18. For each spacing variety BR63-18 produced
significantly more number of tubers than the other
variety.
The two varieties showed a significant linear
response to nitrogen and spacing.
Description
A thesis submitted to the Postgraduate School,
Ahmadu Bello University, Zaria
in partial fulfilLment of the requirements for
the Degree of Master of Science in Agronomy
DEPARTMENT OF AGRONOMY
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY
ZARIA - NIGERIA
DECEMBER 1985
Keywords
EFFECTS,, NITROGEN,, SPACING,, GROWTH,, YIELD,, POTATO,, (Solarium tuberOSUM I.).