Abstract
Two field experiments were conducted in the Experimental Farm of Gemmeiza Agriculture Research Station, Agricultural Research Center (ARC), Egypt during two growing seasons (2011 and 2012) to study the effect of three planting densities (20, 24 , and 28 thousand plants/fad.) and two missing irrigations (the 3rd and 5th irrigations or missing the 4th and 6th irrigations) out of six irrigations normally scheduled at 15 days intervals on yield potentiality of four maize hybrids (S.C. 10, S.C. 173, T.W.C. 324 and T.W.C. 352). Concerning the obtained results, the combined analysis revealed that applied 6 irrigations gave the highest means of the different studied characters, skipping the 3rd and 5th irrigations gave lower growth and grain yield attributes followed in descending order by missing the 4th and 6th irrigations. Then, both irrigation treatments caused significant reduction in grain and biological yields/fad., which reached 17.54 and 9.75% in grain yield as well as 10.36 and 11.19% in biological yield compared with normal irrigation, respectively. Maize hybrid S.C. 10 was superior in most growth and yield attributes as it recorded the highest grain and biological yields/fad., followed by S.C. 173 and T.W.C. 324 as well as T.W.C. 352 in descending order. Meantime, S.C. 173 produced the highest ear length and chlorophyll content. While T.W.C. 352 gave the highest mean for each of cob diameter, number of rows/ear and grain protein content. Data of the combined analysis revealed also, that increasing planting density from 20 to 24 and 28 thousand plants/fad., significantly increased leaf area index and grain and biological yields/fad., but, significantly decreased ear length. Planting density had significant effect on each of days to 50% tasseling and silking, LAI, stem diameter, plant height, ear height and diameter, cob diameter, number of rows/ear, number of kernels/row, thousand grain weight and protein content. Where their averages were decreased with the increase of density. The most interacting effect was observed between maize hybrids on one hand and each of water stress and planting density on the other hand. S.C. 10 and S.C. 173 as well as T.W.C. 324 had the highest grain yield averages under both normal and skipping the 4th and the 6th irrigations. However, under skipping the 3rd and the 5th irrigations, S.C. 173 and both S.C. 10 and T.W.C. 324 had higher grain yields than T.W.C. 352. Under both low and medium densities, each of S.C. 10, S.C. 173 and T.W.C. 324 recorded almost equal grain yield (ard./fad.) averages being heavier than T.W.C. 324 and T.W.C. 352. For both S.C. 10 and S.C. 173 any increase in planting density caused a significant increase in grain yield. For T.W.C. 324 both medium and high densities gave equal grain yield being heavier than low density whereas T.W.C. 352 recorded the highest grain yield from high density.
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 10
Claim · model-written summary
Irrigation omissions reduced maize grain yield.
- Treatment
- both irrigation treatmentse0
- Outcome
- grain yielde0
- Direction
- reductione0
- Value
- 17.54 and 9.75%e0
- Comparator
- normal irrigatione0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both irrigation treatments caused significant reduction in grain and biological yields/fad., which reached 17.54 and 9.75% in grain yield as well as 10.36 and 11.19% in biological yield compared with normal irrigation, respectively”
t0“MAIZE HYBRIDS”
Claim · model-written summary
Irrigation omissions reduced biological yield.
- Treatment
- both irrigation treatmentse0
- Outcome
- biological yielde0
- Direction
- reductione0
- Value
- 10.36 and 11.19%e0
- Comparator
- normal irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both irrigation treatments caused significant reduction in grain and biological yields/fad., which reached 17.54 and 9.75% in grain yield as well as 10.36 and 11.19% in biological yield compared with normal irrigation, respectively”
t0“MAIZE HYBRIDS”
Claim · model-written summary
S.C. 10 had the highest grain and biological yields.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrid S.C. 10 was superior in most growth and yield attributes as it recorded the highest grain and biological yields/fad.”
Claim · model-written summary
S.C. 173 had the highest ear length and chlorophyll content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S.C. 173 produced the highest ear length and chlorophyll content”
t0“MAIZE HYBRIDS”
Claim · model-written summary
T.W.C. 352 had the highest cob diameter, rows per ear and protein content.
- Material
- T.W.C. 352e0
- Outcome
- cob diameter, number of rows/ear and grain protein contente0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T.W.C. 352 gave the highest mean for each of cob diameter, number of rows/ear and grain protein content”
t0“MAIZE HYBRIDS”
Claim · model-written summary
Increased planting density increased leaf area index and grain and biological yields.
- Treatment
- increasing planting density from 20 to 24 and 28 thousand plants/fad.e0
- Outcome
- leaf area index and grain and biological yields/fad.e0
- Direction
- increasede0
- Comparator
- 20e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing planting density from 20 to 24 and 28 thousand plants/fad., significantly increased leaf area index and grain and biological yields/fad.”
t0“MAIZE HYBRIDS”
Claim · model-written summary
Increased planting density decreased ear length.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly decreased ear length”
t0“MAIZE HYBRIDS”
Claim · model-written summary
S.C. 10 and S.C. 173 increased grain yield with increased density.
- Material
- S.C. 10 and S.C. 173e0
- Treatment
- increase in planting densitye0
- Outcome
- grain yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both S.C. 10 and S.C. 173 any increase in planting density caused a significant increase in grain yield”
t0“MAIZE HYBRIDS”
Claim · model-written summary
T.W.C. 324 yielded more at medium and high density than low density.
- Material
- T.W.C. 324e0
- Treatment
- medium and high densitiese0
- Outcome
- grain yielde0
- Direction
- heaviere0
- Comparator
- low densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For T.W.C. 324 both medium and high densities gave equal grain yield being heavier than low density”
t0“MAIZE HYBRIDS”
Claim · model-written summary
T.W.C. 352 yielded most at high density.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T.W.C. 352 recorded the highest grain yield from high density”
t0“MAIZE HYBRIDS”
The same questions in other papers
in vitro · yield · Zea mays (maize)Positive and negative results
43 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
48 papers more in this group
See all 52 papers →density · yield · Zea mays (maize)Positive and negative results
518 papers in the same direction as this paper · 132 in the opposite direction · 7 reporting no difference from an alternative
- positive
- negative
- negative
654 papers more in this group
See all 658 papers →irrigation · yield · Zea mays (maize)Positive and negative results
224 papers in the same direction as this paper · 791 in the opposite direction
- positive
- negative
- positive
1,012 papers more in this group
See all 1,016 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.