Abstract
Large scale cassava production is today being carried out season after season repeatedly on the same piece of land leading to decline in soil fertility and yield overtime. Research information to guide farmers on appropriate fertilizer management under such continuous cropping are few and poorly documented in south eastern Nigeria. A two-year field experiment was conducted during 2007- 2009 at Uyo, a humid forest agro-ecology of south eastern Nigeria to assess the growth and yield response of cassava. Treatments included four rates each of nitrogen (N) and potassium (K) (0, 40, 80 and 120 kg/ha) in all possible factorial combination replicated thrice in a randomized complete block design. Application of N at the highest rate significantly (P = 0.05) increased plant height, produced higher number of leaves and branches/plant, stem girth, number and weight of tubers/plant and total fresh tuber yield compared with other treatments. The fresh tuber yield at 120 kg N/ha was however, comparable with that at 80 kg N/ha rate.
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Claims 3
Claim · model-written summary
The highest nitrogen rate increased cassava height, leaf and branch number, and stem girth.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- N at the highest ratee0
- Outcome
- plant height, produced higher number of leaves and branches/plant, stem girthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of N at the highest rate significantly (P = 0.05) increased plant height, produced higher number of leaves and branches/plant, stem girth”
t0“Cassava”
Claim · model-written summary
The highest nitrogen rate increased cassava tuber number, weight and total fresh yield.
- Taxon
- CassavaManihot esculentat0
- Treatment
- N at the highest ratee0
- Outcome
- number and weight of tubers/plant and total fresh tuber yielde0
- Direction
- increasede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of N at the highest rate significantly (P = 0.05) increased plant height, produced higher number of leaves and branches/plant, stem girth, number and weight of tubers/plant and total fresh tuber yield compared with other treatments”
t0“Cassava”
Claim · model-written summary
Fresh tuber yield at 120 kg N/ha was comparable to 80 kg N/ha.
- Taxon
- CassavaManihot esculentat0
- Treatment
- 120 kg N/hae0
- Outcome
- fresh tuber yielde0
- Direction
- comparablee0
- Comparator
- 80 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fresh tuber yield at 120 kg N/ha was however, comparable with that at 80 kg N/ha rate”
t0“Cassava”
The same questions in other papers
nitrogen · yield · Manihot esculenta (cassava)Positive and negative results
2 papers in the same direction as this paper · 24 reporting no difference from an alternative
- positive
- positive
- positive
23 papers more in this group
See all 27 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.