Abstract
Declining inherent soil nutrient, poor grain yield of maize, delayed supply and high cost of inorganic fertilizer, call for proper timing of application, to optimize the use of this scarce resource in maize production in Nigeria. A field experiment was carried out in the 2007 and 2008 cropping seasons in the University of Agriculture, Abeokuta to investigate the effect of different split applications of NPK fertilizer 20:10:10 on growth and yield of maize. Six treatments laid out in Randomized complete Block Design (RCBD) consisted of 600 kg/ha of NPK 20:10:10 in 2007 and 300 kg/ha in 2008, applied at 2 and 6 WAP (Week after planting), 2 and 8 WAP, 4 and 6 WAP, 4 and 8 WAP, 6 and 8 WAP and no fertilizer (control). Plant height, grain yield, cob length, cob girth, hundred grain weight were all significantly affected (p< 0.05) by different split application. Fertilizer application increased grain yield by 135 260% and 67 191% in 2007 and 2008 respectively. Application of fertilizer at 2 and 8 WAP consistently gave the highest significant grain yield. In 2008, delaying first dose of fertilizer till 6WAP increased grain yield but was not economical. Split application of 300 kg/ha fertilizer, at 2 and 8WAP gave higher economic return than application of 600 kg/ha at 4 and 6WAP or 4 and 8WAP. It was concluded that maize grain yield can be maximized if fertilizer is applied at 2 and 8 WAP, while delayed application of 300 kg/ha of fertilizer till 6WAPcould lead to economic loss.Keywords: Fertilizer, split application, maize
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Claims 10
Claim · model-written summary
Fertilizer application increased maize grain yield by 135 260% relative to no fertilizer in 2007.
- Treatment
- Fertilizer applicatione0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 135 260%e0
- Qualifier
- in 2007e0
- Comparator
- no fertilizer (control)e1
- Setting
- University of Agriculture, Abeokutae2
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e0“Fertilizer application increased grain yield by 135 260% and 67 191% in 2007 and 2008 respectively”
e1“no fertilizer (control)”
e2“A field experiment was carried out in the 2007 and 2008 cropping seasons in the University of Agriculture, Abeokuta”
Claim · model-written summary
Fertilizer application increased maize grain yield by 67 191% relative to no fertilizer in 2008.
- Treatment
- Fertilizer applicatione0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 67 191%e0
- Qualifier
- and 2008 respectivelye0
- Comparator
- no fertilizer (control)e1
- Setting
- University of Agriculture, Abeokutae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e0“Fertilizer application increased grain yield by 135 260% and 67 191% in 2007 and 2008 respectively”
e1“no fertilizer (control)”
e2“A field experiment was carried out in the 2007 and 2008 cropping seasons in the University of Agriculture, Abeokuta”
Claim · model-written summary
Fertilizer applied at 2 and 8 WAP gave the highest maize grain yield, significantly, across split timings.
- Treatment
- Application of fertilizer at 2 and 8 WAPe3
- Outcome
- grain yielde3
- Direction
- higheste3
- Qualifier
- consistentlye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e3“Application of fertilizer at 2 and 8 WAP consistently gave the highest significant grain yield”
Claim · model-written summary
Delaying the first fertilizer dose to 6 WAP increased maize grain yield in 2008.
- Treatment
- delaying first dose of fertilizer till 6WAPe4
- Outcome
- grain yielde4
- Direction
- increasede4
- Qualifier
- In 2008e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e4“In 2008, delaying first dose of fertilizer till 6WAP increased grain yield but was not economical”
Claim · model-written summary
Delaying the first fertilizer dose to 6 WAP was not economical in 2008.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e4“In 2008, delaying first dose of fertilizer till 6WAP increased grain yield but was not economical”
Claim · model-written summary
Split application of 300 kg/ha fertilizer at 2 and 8 WAP gave higher economic return than 600 kg/ha at 4 and 6 WAP or 4 and 8 WAP.
- Treatment
- Split application of 300 kg/ha fertilizer, at 2 and 8WAPe5
- Outcome
- economic returne5
- Direction
- highere5
- Comparator
- application of 600 kg/ha at 4 and 6WAP or 4 and 8WAPe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e5“Split application of 300 kg/ha fertilizer, at 2 and 8WAP gave higher economic return than application of 600 kg/ha at 4 and 6WAP or 4 and 8WAP”
Claim · model-written summary
Maize grain yield can be maximized if fertilizer is applied at 2 and 8 WAP.
- Outcome
- grain yield can be maximized if fertilizer is applied at 2 and 8 WAPe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“maize grain yield can be maximized if fertilizer is applied at 2 and 8 WAP”
Claim · model-written summary
Delayed application of 300 kg/ha fertilizer till 6 WAP could lead to economic loss.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e7“delayed application of 300 kg/ha of fertilizer till 6WAPcould lead to economic loss”
Claim · model-written summary
Plant height, grain yield and cob length were significantly affected by different split fertilizer applications.
- Treatment
- different split applicatione7
- Outcome
- Plant height, grain yield, cob lengthe7
- Qualifier
- p< 0.05e7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e7“Plant height, grain yield, cob length, cob girth, hundred grain weight were all significantly affected (p< 0.05) by different split application”
Claim · model-written summary
Cob girth and hundred grain weight were significantly affected by different split fertilizer applications.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effect of different split applications of npk fertilizer on growthand yield of maize”
e7“Plant height, grain yield, cob length, cob girth, hundred grain weight were all significantly affected (p< 0.05) by different split application”
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