Abstract
The experiment was conducted at Bako Agricultural Research Center from 2008 to 2009 cropping seasons in order to evaluate the effect of sowing dates and ploughing frequency on the development of Grey Leaf Spot (GLS) on maize. The susceptible variety Phb 3253, with three sowing dates (early, optimum and late at 10 days interval) and three ploughing treatments: Minimum tillage (once), farmer’s practice (three times ploughing) and four times ploughing were used. All plots were uniformly treated with GLS infected crop residue before first ploughing. Trial was laid out in factorial arrangement in Randomized Complete Block Design (RCBD) with three replications. Among the planting dates, the highest disease severity of 7.60, 7.44 & 7.00, (1-9 scale) and Area Under Disease Progress Curve (AUDPC) 305.83, 280.1 and 280.33 were recorded in early sown minimum (conservation) tillage practices, while the lowest was with AUDPC 161.50, 196.50 and 222.67 in four times ploughed plots in 2007, 2008 and 2009 years respectively. The highest thousand seed weight and grain yield was observed in four times ploughed and in early sown plots, while the lowest thousand seed weights and grain yield were recorded in the conservation tillage practice. Four times ploughed and early sown fields had a mean yield advantage of 474.73kg (6.66%) and a total yield advantage 2020.77kg (36.23.6%) over three times ploughed and minimum tillage practices for the three seasons 2008-2009. In general higher disease severity, low thousand seed weight and grain yield were recorded for the conservation tillage compared to other practices. The overall results showed that four times ploughing result in superior maize grain yield performance compared to others as it has resulted in reducing the disease development.
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Claims 9
Claim · model-written summary
Early sowing with minimum tillage had the highest disease severity.
- Treatment
- early sown minimum (conservation) tillage practicese0
- Outcome
- disease severitye0
- Direction
- higheste0
- Value
- 7.60, 7.44 & 7.00, (1-9 scale)e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest disease severity of 7.60, 7.44 & 7.00, (1-9 scale) and Area Under Disease Progress Curve (AUDPC) 305.83, 280.1 and 280.33 were recorded in early sown minimum (conservation) tillage practices”
t0“Maize”
Claim · model-written summary
Early sowing with minimum tillage had the highest AUDPC.
- Treatment
- early sown minimum (conservation) tillage practicese0
- Outcome
- Area Under Disease Progress Curve (AUDPC)e0
- Value
- 305.83, 280.1 and 280.33e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Area Under Disease Progress Curve (AUDPC) 305.83, 280.1 and 280.33 were recorded in early sown minimum (conservation) tillage practices”
t0“Maize”
Claim · model-written summary
Four ploughings had the lowest AUDPC across the three listed years.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest was with AUDPC 161.50, 196.50 and 222.67 in four times ploughed plots in 2007, 2008 and 2009 years respectively”
t0“Maize”
Claim · model-written summary
Four ploughings and early sowing had the highest thousand-seed weight and grain yield.
- Treatment
- four times ploughed and in early sown plotse0
- Outcome
- thousand seed weight and grain yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest thousand seed weight and grain yield was observed in four times ploughed and in early sown plots”
t0“Maize”
Claim · model-written summary
Conservation tillage had the lowest thousand-seed weight and grain yield.
- Treatment
- conservation tillage practicee0
- Outcome
- thousand seed weights and grain yielde0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest thousand seed weights and grain yield were recorded in the conservation tillage practice”
t0“Maize”
Claim · model-written summary
Four ploughings and early sowing gave a mean yield advantage of 474.73kg (6.66%).
- Treatment
- Four times ploughed and early sown fieldse0
- Outcome
- mean yield advantagee0
- Direction
- advantagee0
- Value
- 474.73kg (6.66%)e0
- Comparator
- three times ploughed and minimum tillage practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four times ploughed and early sown fields had a mean yield advantage of 474.73kg (6.66%) and a total yield advantage 2020.77kg (36.23.6%) over three times ploughed and minimum tillage practices”
t0“Maize”
Claim · model-written summary
Four ploughings and early sowing gave a total yield advantage of 2020.77kg (36.23.6%).
- Treatment
- Four times ploughed and early sown fieldse0
- Outcome
- total yield advantagee0
- Direction
- advantagee0
- Value
- 2020.77kg (36.23.6%)e0
- Comparator
- three times ploughed and minimum tillage practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four times ploughed and early sown fields had a mean yield advantage of 474.73kg (6.66%) and a total yield advantage 2020.77kg (36.23.6%) over three times ploughed and minimum tillage practices”
t0“Maize”
Claim · model-written summary
Conservation tillage had higher disease severity than other practices.
- Treatment
- conservation tillagee0
- Outcome
- disease severitye0
- Direction
- highere0
- Comparator
- other practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher disease severity, low thousand seed weight and grain yield were recorded for the conservation tillage compared to other practices”
t0“Maize”
Claim · model-written summary
Four ploughings produced superior grain yield and reduced disease development.
- Treatment
- four times ploughinge0
- Outcome
- maize grain yield performancee0
- Direction
- superiore0
- Comparator
- otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four times ploughing result in superior maize grain yield performance compared to others as it has resulted in reducing the disease development”
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