Corn Yield Response to Plant Density and Nitrogen: Spatial Models and Yield Distribution

2018 ◽  
Vol 110 (3) ◽  
pp. 970-982 ◽  
Author(s):  
Rai Schwalbert ◽  
Telmo J.C. Amado ◽  
Tiago A. N. Horbe ◽  
Lincon O. Stefanello ◽  
Y. Assefa ◽  
...  
Keyword(s):  
Plant Density ◽  
Spatial Models ◽  
Yield Response ◽  
Corn Yield ◽  
Yield Distribution

scholarly journals Corn Response Across Plant Densities and Row Configurations for Different Moisture Environments

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Kipling S. Balkcom ◽  
Kira L. Bowen
Keyword(s):  
Cover Crops ◽  
Plant Density ◽  
Conservation Tillage ◽  
Summer Rainfall ◽  
Moisture Stress ◽  
Yield Response ◽  
Corn Yield ◽  
Measured Variable ◽  
Irrigation Level ◽  
Plant Densities

Corn (Zea mays L.) production in the Southeast can be negatively impacted by erratic summer rainfall and drought-prone, coarse-textured soils, but irrigation combined with conservation tillage and cover crops may support greater plant densities arranged in different row configurations to improve yield. We examined five site-years of data across two soil types in Alabama to compare corn yields in a conservation system across three plant densities for single- and twin-row configurations in dryland and irrigated moisture regimes. Treatments were arranged with a split plot treatment restriction in a RCB design with three replications. Main plots were irrigation level (no irrigation and irrigation), and subplots were a factorial arrangement of three plant densities (5.9, 7.4, and 8.9 plants m−2) and row configurations (single and twin). A moisture environment (low and moderate) variable, defined by growing season rainfall, was used to average over site-years. In general, irrigation in the moderate-moisture environment improved each measured variable (plant height, stover yield, corn yield, and test weight) and decreased grain N concentration and aflatoxin levels compared to the low-moisture environment with no irrigation. Benefits of increased rainfall and irrigation to reduce soil moisture stress across drought-prone soils were evident. Pooled results across all site-years indicated no yield response as plant density increased, but greater yields were observed with the greatest plant densities in the moderate-moisture environments. No advantage for twin-row corn production was observed across five site-years in Alabama, which indicates either row configuration can be successfully adopted.

Giant foxtail (Setaria faberi) interference in nonirrigated corn (Zea mays)

Weed Science ◽  
1997 ◽  
Vol 45 (2) ◽  
pp. 256-260 ◽  
Author(s):  
Jason C. Fausey ◽  
James J. Kells ◽  
Scott M. Swinton ◽  
Karen A. Renner
Keyword(s):  
Zea Mays ◽  
Seed Germination ◽  
Seed Production ◽  
Dry Matter ◽  
Plant Density ◽  
Yield Response ◽  
Corn Yield ◽  
Setaria Faberi ◽  
Giant Foxtail ◽  
Inflorescence Length

Studies were conducted at East Lansing, MI, in 1994 and 1995 to examine corn yield response to giant foxtail interference and to examine the effect of giant foxtail density on giant foxtail biomass, seed production, and seed germination. Treatments consisted of 0, 10, 30, 60, 84, and 98 giant foxtail plants m−1of row in 1994 and 0, 10, 27, 30, 60, and 69 plants m−1of row in 1995. The influence of giant foxtail density on corn yield fit a hyperbolic equation. Corn yields were reduced 13% in 1994 and 14% in 1995 from 10 giant foxtail plants m−1of row. Corn dry matter at maturity was decreased 24 and 23% from 10 giant foxtail plants m−1of row in 1994 and 1995, respectively. Giant foxtail seed production increased linearly as inflorescence length increased. The length of a single giant foxtail inflorescence increased as plant density increased and the number of inflorescence produced per plant decreased. Giant foxtail seed production ranged from 518 to 2,544 seeds per plant. Ten giant foxtail plants m−1of row produced 15,700 seeds m−2. Giant foxtail seed germination was not affected by plant density.

CORN YIELD RESPONSE TO IRRIGATION, PLANT POPULATION AND NITROGEN IN A COOL, HUMID CLIMATE

1986 ◽  
Vol 66 (3) ◽  
pp. 453-464 ◽  
Author(s):  
D. M. BROWN
Keyword(s):  
Zea Mays ◽  
Soil Moisture ◽  
Zea Mays L ◽  
Plant Density ◽  
Plant Population ◽  
Yield Response ◽  
Corn Yield ◽  
Subsequent Paper ◽  
Southern Ontario ◽  
High Plant Density

Summer dry spells in some areas of southern Ontario during the last decade have increased interest in supplemental irrigation. Field studies were conducted in a 2500 heat unit area of southern Ontario on Orthic/Brunisolic Grey Brown Luvisol soils to determine the yield response of field corn (Zea mays L.) to irrigation in midsummer when combined with increased plant density and N rates. The yield responses, phenological records and soil moisture measurements are to be used in the calibration and validation of a corn yield estimation model, to be published in a subsequent paper. Two to four irrigations were applied each year using the line method when soil moisture pressure potential reached −40 to −60 kPa at 22.5 cm depth. Development stages were unaffected by irrigation. Yield increases from irrigation were directly proportional to water applied in midsummer and the intensity of dry weather. Yields increased with plant density in 4 of the 5 yr and were usually consistent over irrigation levels. Additional nitrogen above the recommended rate increased yields in 1982 and 1983, decreased yields in 1981, and resulted in no differences the other two years. In years of positive response to extra nitrogen, there was usually a greater response with irrigation and the responses were greatest at high plant density and for the longer season hybrids. Harvest indices decreased as irrigation amount increased and were exceptionally high in 1983.Key words: Corn, Zea mays L., line-source irrigation, plant population, nitrogen, harvest index

Corn Yield Response of Bt and Near-Isolines to Plant Density

2003 ◽  
Vol 2 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J. W. Singer ◽  
R. W. Taylor ◽  
W. J. Bamka
Keyword(s):  
Plant Density ◽  
Yield Response ◽  
Corn Yield

YIELD OF CORN HYBRIDS DEPENDING ON PLANT DENSITY AND FERTILIZATION SYSTEMS

2020 ◽  
Author(s):  
V. Polyakov ◽  
Keyword(s):  
Grain Yield ◽  
Plant Density ◽  
Growing Season ◽  
Research Field ◽  
Forest Steppe ◽  
Corn Yield ◽  
Field Calculation ◽  
Corn Hybrids ◽  
Maize Hybrid ◽  
Fertilizer System

The article presents the results of research on the formation of corn yield for grain depending on the elements of cultivation technology in the Forest-Steppe of Ukraine. The goal of the research was to identify the influence of plant density and fertilizer system on the yield of corn hybrids for grain. The research was conducted during 2017-2019 in the research field of Bila Tserkva National Agrarian University (Bila Tserkva NAU). Research methods: field, calculation and statistical. Results. Regularities of growth, development and formation of yield by plants are revealed, both in concrete conditions of years of researches, and taking into account average long-term values taking into account features of hybrid-oriented technology. According to the results of the experiment it was recorded that the maximum yields for growing early-maturing maize hybrid DN PIVYHA with FAO 180 in general were obtained at a pre-harvest density of 75 thousand units/ha and the use of combined organo-mineral fertilizer system - 11.09 t/ha; medium-early maize hybrid DN ORLYK, FAO 280 in general in the experiment provided a grain yield of 9.60 t/ha, and in terms of 2017 - 7.86 t/ha, in 2018 - 11.22 t/ha and in 2019 - 9, 72 t/ha, but the medium-ripe hybrid of corn DN SARMAT, FAO 380 provided a grain yield of 10.81 t/ha, and in the context of 2017 - 9.31 t/ha, in 2018 - 11.68 t/ha and in 2019 - 11.44 t/ha. Significant influence on the formation of the yield of corn has a hybrid factor (27 %), fertilizer system determines the level of productivity by 21 % and interacts closely with the conditions of the growing season (factor BV 9 %), growing season conditions also determine the level of productivity of corn plants (19 %), and the pre-harvest density determines this feature by 18 %. Conclusions: In the conditions of the Right Bank part of the Forest-Steppe of Ukraine there is an increase in the level of productivity of maize hybrids from early to medium-ripe hybrids, regardless of the influence of other experimental factors.

Effect of plant density and vegetative branch retention on within-plant yield distribution and maturity performance of cotton

2010 ◽  
Vol 18 (4) ◽  
pp. 792-798 ◽  
Author(s):  
He-Zhong DONG ◽  
Zhen-Huai LI ◽  
Zhen LUO ◽  
He-Quan LU ◽  
Wei TANG ◽  
...  
Keyword(s):  
Plant Density ◽  
Plant Yield ◽  
Yield Distribution

A dynamic model of corn yield response to water

1980 ◽  
Vol 16 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Thomas H. Morgan ◽  
Arlo W. Biere ◽  
Edward T. Kanemasu
Keyword(s):  
Dynamic Model ◽  
Yield Response ◽  
Corn Yield ◽  
Response To Water

scholarly journals Fall and spring seeding date effects on herbicide-tolerant canola (Brassica napus L.) cultivars

2004 ◽  
Vol 84 (2) ◽  
pp. 419-430 ◽  
Author(s):  
G. W. Clayton ◽  
K. N. Harker ◽  
J. T. O’Donovan ◽  
R. E. Blackshaw ◽  
L. M. Dosdall ◽  
...  
Keyword(s):  
Field Experiments ◽  
Plant Density ◽  
Early Spring ◽  
Yield Response ◽  
Management Options ◽  
Brassica Napus L ◽  
Seeding Date ◽  
Herbicide Tolerant ◽  
Root Maggot ◽  
Crops Yield

More flexible and effective weed control with herbicide-tolerant B. napus canola allows for additional seeding management options, such as fall (dormant) and early spring (ES) seeding. Field experiments were conducted at Lacombe and Beaverlodge (1999–2001), Didsbury (1999–2000), and Lethbridge (2000–2001), Alberta, Canada, primarily to evaluate the effect of fall (late October-November), ES (late April-early May), and normal spring (NS) (ca. mid-May) seeding dates on glufosinate-, glyphosate-, and imidazolinone-tolerant canola development and yield. Fall seeding resulted in 46% lower plant density and nearly double the dockage than spring seeding. ES-seeded canola had 19% higher seed yield and 2.1% higher oil content than fall-seeded canola. ES seeding significantly increased yield compared to fall-seeded canola for 8 of 10 site -years or compared to NS seeding for 4 of 10 site-years; ES-seeded canola equalled the yield of NS-seeded canola for 6 of 10 site-years. Yield response to seeding date did not differ among herbicide-tolerant cultivars. Seeding date did not influence root maggot damage. Seeding canola as soon as possible in spring increases the likelihood of optimizing canola yield and quality compared to fall seeding and traditional spring seeding dates. Key words: Dormant seeding, seeding management, root maggot, herbicide-resistant crops, yield components, operational diversity

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