Abstract
Weather conditions in the southwestern United States are variable and influence crop growing periods with late spring and early fall frosts which significantly impact cropping seasons. With the development of new maize hybrids, grain yield, evapotranspiration, and water use efficiency can be substantially impacted by planting density and planting date. Thus, the optimum plant density and planting date for maximum grain yield must be determined for local conditions. Field experiments were conducted at NMSU Agricultural Science Center in Farmington to evaluate six plant densities (54,700; 64,600; 74,600, 88,000; 101,700; and 120,100 pph) under seven planting dates (from April 23 to June 5 in 2019 and from April 21 to June 10 in 2020) to determine the planting window and the optimum density. Plots were sprinkler irrigated and crop management was similar across all planting dates during the two growing seasons. The results showed that crop height and leaf area index varied with plant density and planting date. Grain yield also varied with plant density and planting date. The highest grain yield (16.8 Mg ha−1) was observed under the density 101,700 pph which showed statistically similar yield as the density 88,000 pph and the first planting trended to provide the best grain yield in 2019. In 2020, the highest grain yield (17Mg ha−1) was obtained under the density 88,000 pph on May 18 planting date. Plant density 88,000 pph was revealed as the optimum density that maximized grain yield and WUE and maize planting after May 25 is not recommended.
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Claims 8
Claim · model-written summary
Maize height and leaf area index varied with planting density and date.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop height and leaf area index varied with plant density and planting date.”
t0“maize”
Claim · model-written summary
Grain yield varied with plant density and planting date.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield also varied with plant density and planting date.”
t0“maize”
Claim · model-written summary
In 2019, 101,700 pph produced the highest grain yield of 16.8 Mg ha−1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield (16.8 Mg ha−1) was observed under the density 101,700 pph”
t0“maize”
Claim · model-written summary
Yield at 101,700 pph was statistically similar to yield at 88,000 pph.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“density 101,700 pph which showed statistically similar yield as the density 88,000 pph”
t0“maize”
Claim · model-written summary
The first 2019 planting trended toward the best grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the first planting trended to provide the best grain yield in 2019.”
t0“maize”
Claim · model-written summary
In 2020, 88,000 pph on May 18 produced the highest grain yield of 17Mg ha−1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2020, the highest grain yield (17Mg ha−1) was obtained under the density 88,000 pph on May 18 planting date.”
t0“maize”
Claim · model-written summary
A density of 88,000 pph was identified as optimum for grain yield and WUE.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant density 88,000 pph was revealed as the optimum density that maximized grain yield and WUE”
t0“maize”
Claim · model-written summary
Planting maize after May 25 is not recommended.
- Outcome
- planting after May 25 is not recommendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize planting after May 25 is not recommended.”
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sowing time · yield · Zea mays (maize)Positive and negative results
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