scholarly journals Comparison of Models in Assessing Relationship of Corn Yield with Plant Height Measured during Early- to Mid-Season

2011 ◽  
Vol 3 (3) ◽  
Author(s):  
Xinhua Yin ◽  
Ngowari Jaja ◽  
M. Angela McClure ◽  
Robert M. Hayes
Keyword(s):  
Plant Height ◽  
Corn Yield ◽  
Relationship Of

scholarly journals Green ear yield and grain yield of maize cultivars in competition with weeds

2010 ◽  
Vol 28 (1) ◽  
pp. 77-85 ◽  
Author(s):  
P.S.L. Silva ◽  
K.M.B. Silva ◽  
P.I.B. Silva ◽  
V.R. Oliveira ◽  
J.L.B. Ferreira
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Corn Yield ◽  
Modern Agriculture ◽  
Maize Cultivars ◽  
Randomized Complete Block Design ◽  
Ear Height ◽  
Herbicide Use ◽  
Ground Part

The reduction in herbicide use is one of the greatest interests for modern agriculture and several alternatives are being investigated with this objective, including the adoption of cultivars that suppress weeds. The objective of this study was to verify if maize cultivars develop differently, in competition with weeds, to produce green ears and grain. Randomized complete block design was used, with split-plots and five replications. Cultivars DKB 390, DKB 466, DKB 350, AG 7000, AG 7575 and Master, were evaluated in the plots, without weeding and two weedings (at 22 and 41 days after sowing) in sub plots. Twenty-one species were identified in the experimental area, the most frequent being Gramineae (Poaceae), Euphorbiaceae, Leguminosae (Fabaceae) and Convolvulaceae species. There was no difference in the dry biomass above-ground part of the weeds in the plots of the evaluated cultivars. The cultivars behaved similarly in treatments with or without hoeing, except for plant height and ear height evaluations. Without hoeing, plant height increased in cultivar DKB 390, while plant height and ear height decreased in cultivar AG 7575. In the other cultivars, these traits did not change under weed control. The presence of weeds decreased the values of all traits employed to assess green corn yield, with the exception of the total number of green ears and grain yield.

scholarly journals Organic Compost of Swine Manure in the Production of Green Corn in Manaus, Brazil

2020 ◽  
Vol 12 (10) ◽  
pp. 188
Author(s):  
Pamela Karoline Correia Brunner ◽  
Hugo César Tadeu ◽  
Carla Coelho Ferreira ◽  
Ana Cecília Nina Lobato ◽  
Aurinei da Silva Ramos ◽  
...  
Keyword(s):  
Plant Height ◽  
Swine Manure ◽  
Chemical Characteristic ◽  
Corn Yield ◽  
Corn Cob ◽  
Swine Waste ◽  
Higher Plant ◽  
Soil P ◽  
Before And After ◽  
Organic Compost

Pig farming is considered one of the activities with the greatest environmental impact due to the erroneous disposal of swine waste. The present work aimed to produce an organic compost using waste from pig production and evaluate its chemical characteristic, corn yield under doses of this organic compost and soil nutritional quality before and after the experiment implementation. The Corn was fertilized at sowing and 30 days after plant germination using organic compost from pig waste at the doses: 0, 2, 3, 4 and 5 t ha-1. The Corn used was CATIVERDE 02 and were seeded at 1.0 m spacing between rows and 0.40 m between plants, in a total area of 240 m2. The experimental design was randomized blocks with four replications and five doses of organic compost. The parameters evaluated for corn were: plant height, stem diameter, weight and corncob length. Fertilization with swine organic compost increases in soil P, K, Ca, even after the corn harvest. The best treatment was with a dose of 5 t ha-1, as it resulted in higher plant height (1.85 m) and corn cob weight (261 g).

RELATIONSHIPS OF MATURITY, HEIGHT AND MORPHOLOGICAL TRAITS WITH WHOLE-PLANT YIELD AND DIGESTIBILITY OF BARLEY CULTIVARS

1987 ◽  
Vol 67 (4) ◽  
pp. 1009-1017 ◽  
Author(s):  
V. S. BARON ◽  
SOLOMON KIBITE
Keyword(s):  
Plant Height ◽  
Maximum Yield ◽  
Stepwise Multiple Regression ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Whole Plant ◽  
Days To Heading ◽  
Relationship Of ◽  
The Relationship

Eight six-rowed barley (Hordeum vulgare L.) lines were used to study the relationship of whole-plant dry matter yield (WPY), whole-plant digestible yield (WPDY) and percent in vitro organic matter digestibility (IVDOM) with plant height, maturity, grain and leaf content at the time of maximum WPY. The study was conducted at Lacombe, Alberta during 1983 and 1984. Whole-plant harvests were initiated at the 50% heading stage of individual lines and continued for seven consecutive weeks. WPY and WPDY attained maximum levels at identical harvest times after heading in all lines and years. In 1983 all lines, and in 1984, six of eight lines attained maximum WPY at the same time postheading (fourth and third harvest in 1983 and 1984, respectively). WPY and WPDY were significantly correlated with days from planting to time of maximum yield (TMY) in both years. Partial coefficients of determination from stepwise multiple regression analyses indicated that the effect of days from planting until TMY > plant height > days to heading on WPY. The effect of days from planting until TMY > plant height > IVDOM > days to heading on WPDY, and the effect leaf content was more important than any other variable on IVDOM. It was concluded that late-maturing, tall barley lines having a high leaf content were most likely to produce high WPDY and hence be advantageous for utilization as whole-plant barley forage.Key words: Barley, whole-plant, digestibility, maturity, height

Genetic variability and inter-relationship of some quantitative characters in safflower

1974 ◽  
Vol 83 (2) ◽  
pp. 197-202 ◽  
Author(s):  
M. O. Khidir
Keyword(s):  
Plant Height ◽  
Indirect Effect ◽  
Block Design ◽  
Head Width ◽  
Positive Contribution ◽  
Quantitative Characters ◽  
Randomized Block Design ◽  
Relationship Of ◽  
100 Seed Weight ◽  
Number Of Seeds

SUMMARYEighteen varieties of safflower were studied in a randomized block design with five replications. Data on fourteen quantitative characters were recorded. Appreciable variability was displayed by all characters, especially yield and number of heads/plant. The heritability estimates ranged between 65 and 98%.Seed (achene) yield gave a significant positive genotypic correlation with number of seeds/head, head width, bract width and oil content. The 100-seed weight was significantly negatively correlated with the number of seeds/head and plant height at maturity. The genotypic correlations between yield/plant and four other traits were partitioned into direct and indirect effects. The highest direct positive contribution to yield was given by plant height, which had also a positive indirect effect via number of heads. The direct effect of the number of heads/plant was negative and the indirect effect via head width was positive.

Yellow Nutsedge Control and Reduced Tuber Production withS-metolachlor, Halosulfuron plus Dicamba, and Glyphosate in Furrow-Irrigated Corn

2012 ◽  
Vol 26 (2) ◽  
pp. 213-219 ◽  
Author(s):  
Joel Felix ◽  
George Newberry
Keyword(s):  
Plant Height ◽  
Field Studies ◽  
Weed Competition ◽  
Corn Yield ◽  
Average Yield ◽  
Corn Plant ◽  
Yellow Nutsedge ◽  
Weed Interference ◽  
Tuber Production ◽  
Herbicide Treatments

Yellow nutsedge is an important weed problem in furrow-irrigated fields in the Treasure Valley of eastern Oregon and southwestern Idaho. Field studies were conducted in 2008 and 2009 to evaluate the effect of PPIS-metolachlor or EPTC followed by POST halosulfuron and dicamba plus glyphosate or glyphosate alone on foliar yellow nutsedge control and tuber production in corn. Corn plant height at 8 and 24 d after treatment (DAT) was reduced 20 and 17%, respectively, in POST herbicides alone compared with PPI plus POST herbicide treatments. Yellow nutsedge control at 8 DAT averaged 78% for treatments that included PPI application of EPTC orS-metolachlor 1,600 g ai ha−1followed by halosulfuron plus dicamba (35 plus 155 g ha−1or 70 plus 310 g ha−1) plus glyphosate 785 g ha−1compared with POST treatments alone (49%). The control at 24 DAT was 84% for treatments that contained halosulfuron plus dicamba compared with 73% for POST glyphosate alone. Yellow nutsedge tubers were reduced 56 to 68% among treatments at the end of 2008. Tuber reduction in 2009 was greater with treatments that included PPI herbicides followed by sequential halosulfuron plus dicamba (35 plus 155 g ha−1) plus glyphosate compared with glyphosate alone. Corn yield reflected the level of yellow nutsedge control and early-season weed interference. Treatments that included PPI herbicides had an average yield of 8.2 T ha−1compared with 6.6 T ha−1with sequential glyphosate alone. There was a correlation between percent foliar control and the number of yellow nutsedge tubers produced at the end of each year. Application of PPI herbicides followed by POST halosulfuron plus dicamba (35 plus 155 g ha−1or 70 plus 155 g ha−1) plus glyphosate improved yellow nutsedge control, reduced early corn–weed competition, and produced the highest corn yield under furrow-irrigated conditions.

scholarly journals Effects of Atlantic and Pacific Ocean Teleconnections on Corn Yield East of Puebla, Mexico: Case Studies

2021 ◽  
pp. 85-99
Author(s):  
Ma De Los Ángeles Velasco-Hernández ◽  
Tomás Morales-Acoltzi ◽  
Miguel Ángel García-Castro ◽  
Rogelio Bernal-morales ◽  
Joaquín Zagoya-Martínez ◽  
...  
Keyword(s):  
Case Studies ◽  
Southern Oscillation ◽  
Geographical Location ◽  
Structured Interview ◽  
Growth Cycle ◽  
Corn Yield ◽  
Eastern Region ◽  
Hurricane Activity ◽  
Relationship Of ◽  
The Relationship

Ocean-atmospheric interactions have effects at different scales; forming microclimates, which can explain variations with climatic or natural anomalies, between meteorological processes. This research analyzes and identifies the relationship of the teleconnection hydrometeorological effects, which determine the distribution of precipitation in corn yield. The data were used from a semi-structured interview directed to corn producers, where seven years of case studies were identified for the eastern region of the state of Puebla, Mexico. The Graphics were made with “pentad scale distribution”. The results show the importance of geographical location for agricultural activities in relation to a valley with altitudinal gradient. In addition, the corn growth cycle is associated with tropical disturbances from east Puebla region as well as Hurricane activity. It was identified that the relationship of teleconnections and the distribution of rainfall are main factors that influence in the development good or bad of corn, showed in the yields, where the different phases of ENSO (EL NIÑO Southern Oscillation) have a differentiated impact on the availability of precipitation in this case studies of the present investigation.

Sign in / Sign up

Export Citation Format

Share Document