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Author: Nathan Schroeder
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Examining the interaction between population and corn yield is important because the challenge of feeding the world is real. Projections show the world population is increasing and expected to reach over 9 billion people by around 2050. Expanding global urbanization drives the need to increase corn yield on current land and needs to occur to meet global population growth. Previous studies on corn yield increases conclude that ear size is limited and increasing corn plants per acre is important to increasing yield potential. This study used Answerplot data to analyze the effect of increasing plant population on corn yield in 2009. There are over 150 Answerplots across the cornbelt. The weather of 2009 proved to be a challenging year in certain regions of the cornbelt. Record rainfall, and below normal temperature had an influence on corn yield. A total of 4,180 observations from Answerplot were used from across the nation to analyze the relationship between corn yield and plant population. Multiple regression models were estimated and found that in 2009, an increase in plant population from 30,000 to 40,000 plants per acre resulted in an 8.5 bushel per acre increase. This result was robust for various econometric models. Economically, the cost per acre for current seed for this increase in population is about $38.87 per acre. At a corn price greater than $4.58 per bushel, increasing plant population would have made economic sense for 2009.
Author: Nathan Schroeder
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Examining the interaction between population and corn yield is important because the challenge of feeding the world is real. Projections show the world population is increasing and expected to reach over 9 billion people by around 2050. Expanding global urbanization drives the need to increase corn yield on current land and needs to occur to meet global population growth. Previous studies on corn yield increases conclude that ear size is limited and increasing corn plants per acre is important to increasing yield potential. This study used Answerplot data to analyze the effect of increasing plant population on corn yield in 2009. There are over 150 Answerplots across the cornbelt. The weather of 2009 proved to be a challenging year in certain regions of the cornbelt. Record rainfall, and below normal temperature had an influence on corn yield. A total of 4,180 observations from Answerplot were used from across the nation to analyze the relationship between corn yield and plant population. Multiple regression models were estimated and found that in 2009, an increase in plant population from 30,000 to 40,000 plants per acre resulted in an 8.5 bushel per acre increase. This result was robust for various econometric models. Economically, the cost per acre for current seed for this increase in population is about $38.87 per acre. At a corn price greater than $4.58 per bushel, increasing plant population would have made economic sense for 2009.
Author: Joseph Thomas Gaspard
Publisher:
ISBN:
Category : Hybrid corn
Languages : en
Pages : 158
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Book Description
Author: Clark Waller Jennings
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 146
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Book Description
Author: Ali M. Al-Darby
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 198
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Book Description
Author: Julius Alani B. Oyedokun
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 162
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Book Description
Author: Sudirman Yahya
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 560
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Book Description
Author: Nathaniel John David Lungren
Publisher:
ISBN:
Category : Hybrid corn
Languages : en
Pages : 104
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Book Description
Author: Scott M. Nelson
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Book Description
Results indicate that transgenic inbreds responded similarly to plant population stress as normal inbreds. The low yield in transgenic inbreds was associated with reduced ear and kernel numbers despite plant population. The scope of this study was inbred specific. Conclusions about the behavior of transgenes in commercial hybrid production can not be made from this research.
Author: Matthew W. Hock
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
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Book Description
Improved hybrid genetics and more efficient farming techniques have increased corn (Zea mays L.) production and grain yields for Mid-South farmers. Early planting is one technique to mitigate heat and drought stress that negatively influence grain production. The first objective was: a) determine the effect of early planting on grain yield, b) to determine the effects on physiological characteristics and c) determine if some hybrids are better suited for early planting. Data suggest there were yield advantages for early planted treatments. Starkville 2014 yields exhibited the greatest reduction of .80 Mg ha-1 for each week that planting was delayed. A second objective was: a) determine optimum plant density when planting early, b) determine population effects on physiological characteristics, and c) determine hybrid responses. Hybrids were evaluated at seeding rates ranging from 49,400 to 98,800 plants ha-1. Corn grain yield was maximized at 86, 450 to 98,800 plants ha-1.
Author: Brock Jordan Leonard
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
Yield improvements over the past few decades have been attributed to increasing optimum plant population and not the increase of grain produced per plant. A goal in precision agriculture is to identify seeding rates that optimize yield, but that also minimize competition. Competition occurs when plants of the same species compete for vital resources needed for plant growth and fruit development. The objective of this research is to examine corn development and physiological responses across the growing season of multiple hybrids at a range of seeding rates. We implemented a measurement protocol in a field - scale strip - trial design at multiple locations in the Central Claypan Areas of Northeast Missouri Study 1. A randomized complete block design study planted at Bradford Research and Extension center in Columbia MO Study 2. The design of the experiments on Study 1 included four different hybrids at three different seeding rates: 74,000, 84,000, and 94,000 seeds ha - 1 . Hybrids were chosen with maturity dates ranging from 103 - 112 days to maturity. For Study 2 an additional four seeding rates were planted at 44,000, 54,000, 64,000, and 104,000 seed ha - 1. In sub plots an intensive set of physiological and morphological measurements were taken throughout the season. Competition can lead to greater per - plant variability for different responses some playing a vital role in grain yield, biomass, and harvest index. With greater understanding of how corn hybrids respond to increased intra - specific competition, better seeding rate recommendations can be made to optimize grain yield on varying soils in Mid - Missouri.
