Abstract
Best nitrogen (N) management practices are most important for increasing maize (Zea mays L.) productivity and profitability in Northwest Pakistan. Field experiments were performed at the New Developmental Research Farm of NWFP Agricultural University, Peshawar during summer 2002 and 2003. Factorial experimental treatments were two plant densities (D1 = 60,000 and D2 = 100,000 plants ha−1) and three N rates (N1 = 60, N2 = 120 and N3 = 180 kg N ha−1) as main plots, and six split N applications in different proportions at different growth stages of maize (cv. ‘Azam’) in two equal, three equal, three unequal, four equal, five equal and five unequal splits at sowing and with first, second, third, and fourth irrigation at two week intervals as subplots. Application of the higher N rate (180 kg ha−1) with 4 to 5 splits significantly increased leaf, stem, ear, and total plant dry weight at silking and physiological maturity as well as grain yield plant−1 at both low and high plant densities. Variation in dry matter partitioning and grain yield in maize due to fluctuation in the rainfall data of the two years suggests zonal specific effective N management practices for sustainable maize production in different agro-ecological zones of Northwest Pakistan.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
The higher N rate (180 kg/ha) with 4 to 5 splits significantly increased leaf, stem and ear dry weight at silking and physiological maturity.
- Treatment
- higher N rate (180 kg ha−1) with 4 to 5 splitse1
- Outcome
- leaf, stem, eare1
- Direction
- increasede1
- Qualifier
- dry weight at silking and physiological maturitye1
- Setting
- New Developmental Research Farm of NWFP Agricultural University, Peshaware2
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing maize (Zea mays L.) productivity”
e1“Application of the higher N rate (180 kg ha−1) with 4 to 5 splits significantly increased leaf, stem, ear, and total plant dry weight at silking and physiological maturity as well as grain yield plant−1 at both low and high plant densities”
e2“Field experiments were performed at the New Developmental Research Farm of NWFP Agricultural University, Peshawar during summer 2002 and 2003”
Claim · model-written summary
The higher N rate with 4 to 5 splits significantly increased total plant dry weight at silking and physiological maturity.
- Treatment
- higher N rate (180 kg ha−1) with 4 to 5 splitse1
- Outcome
- total plant dry weighte1
- Direction
- increasede1
- Qualifier
- at silking and physiological maturitye1
- Setting
- New Developmental Research Farm of NWFP Agricultural University, Peshaware2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing maize (Zea mays L.) productivity”
e1“Application of the higher N rate (180 kg ha−1) with 4 to 5 splits significantly increased leaf, stem, ear, and total plant dry weight at silking and physiological maturity as well as grain yield plant−1 at both low and high plant densities”
e2“Field experiments were performed at the New Developmental Research Farm of NWFP Agricultural University, Peshawar during summer 2002 and 2003”
Claim · model-written summary
The higher N rate with 4 to 5 splits significantly increased grain yield per plant at both low and high plant densities.
- Treatment
- higher N rate (180 kg ha−1) with 4 to 5 splitse1
- Outcome
- grain yield plant−1e1
- Direction
- increasede1
- Qualifier
- at both low and high plant densitiese1
- Setting
- New Developmental Research Farm of NWFP Agricultural University, Peshaware2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing maize (Zea mays L.) productivity”
e1“Application of the higher N rate (180 kg ha−1) with 4 to 5 splits significantly increased leaf, stem, ear, and total plant dry weight at silking and physiological maturity as well as grain yield plant−1 at both low and high plant densities”
e2“Field experiments were performed at the New Developmental Research Farm of NWFP Agricultural University, Peshawar during summer 2002 and 2003”
Claim · model-written summary
Zonal specific effective N management practices are suggested for sustainable maize production in different agro-ecological zones of Northwest Pakistan.
- Outcome
- zonal specific effective N management practicese3
- Setting
- different agro-ecological zones of Northwest Pakistane3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing maize (Zea mays L.) productivity”
e3“suggests zonal specific effective N management practices for sustainable maize production in different agro-ecological zones of Northwest Pakistan”
Claim · model-written summary
Variation in dry matter partitioning and grain yield between the two years is attributed to fluctuation in rainfall.
- Treatment
- fluctuation in the rainfall data of the two yearse4
- Outcome
- dry matter partitioning and grain yielde4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Variation in dry matter partitioning and grain yield in maize due to fluctuation in the rainfall data of the two years”
The same questions in other papers
nitrogen · growth · Zea mays (maize)Positive and negative results
618 papers in the same direction as this paper · 115 in the opposite direction · 14 reporting no difference from an alternative
- negative
- no effect
- negative
744 papers more in this group
See all 748 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
- no effect
- no effect
- positive
2,181 papers more in this group
See all 2,185 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.