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 Response of wheat yield and its components to zinc and iron application under different levels of nitrogen

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Gheith El-Sayed ◽  
◽  
Ola El-Badry ◽  
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Plant Height ◽  
Block Design ◽  
Wheat Yield ◽  
Grain Protein Content ◽  
Yield Component ◽  
Grain Protein ◽  
Research Station ◽  
Randomized Complete Block Design

To evaluate the effect of nitrogen, zinc and iron as soil application on yield and yield component of wheat, the present study was conducted at Agricultural and Experimental Research Station at Giza, Faculty of Agriculture Cairo University, Egypt during 2015/2016 and 2016/2017 seasons. The experimental design was split-plot in randomized complete block design with three replications. Results showed that positive significant effect on plant height, number of spike/m2, spike length; number of grain per spike, grain yield per unit area in both seasons and grain protein content in one season were achieved by application of N and the micronutrients. Whoever, the highest significant in the above mentioned characters was obtained either by application the highest N levels (100kg N /fed.) or in addition to mixture of Zn and Fe. The interaction between the studied factors had significant effect on plant height and grain yield in both seasons as well as on grain protein content in the second season, where the highest values of these parameters were recorded by application of 100kg N/fed., Zn and Fe in mixture.

scholarly journals Study of Combining Ability and Nature of Gene Action for Yield and Yield Related Traits in Maize (Zea mays L.)

2019 ◽  
pp. 1-8
Author(s):  
Birender Singh ◽  
Abhinav Abhishek ◽  
R. B. P. Nirala ◽  
S. S. Mandal ◽  
Tushar Ranjan
Keyword(s):  
Grain Yield ◽  
Zea Mays L ◽  
Gene Action ◽  
Block Design ◽  
Diallel Mating Design ◽  
Randomized Complete Block Design ◽  
Additive Gene ◽  
Ear Height ◽  
The Mean ◽  
Half Diallel

The present investigation was carried out using thirty eight genotypes (eight parents, twenty eight F1's and two checks) using Griffing's half diallel mating design. The experiment was laid out in a randomized complete block design with three replications during kharif 2017 at the research farm of Bihar Agriculture College, Sabour. Observations were recorded for six pre-harvest characters viz days to 50% anthesis, days to 50% silking, anthesis silking interval, days to 75% brown husk, plant height, ear height and seven post-harvest characters viz cob length, cob diameter, number of kernel rows per cob, number of kernels per row, 1000 seed weight, shelling percentage and grain yield at 15% moisture. The mean sum of square of treatments was found to be significant for days to 75% brown husk and shelling per cent and highly significant for all other characters. The mean sum of square for GCA was found to be significant for cob length, no. of kernel row per cob, no. of kernels per row and highly significant for remaining all the characters except days to 75% brown husk and shelling%. The mean sum of square for SCA was significant for days to 75% brown husk and highly significant for all the remaining characters. On the basis of GCA effect for grain yield at 15% moisture, the parents BML-7, VQL-1 and SML-1 were found to be good general combiners. The ratio of GCA variance to SCA variance was found to be less than 1 for all the traits which indicated the preponderance of non-additive gene action. On the basis of SCA effects better performing crosses for grain yield at 15% moisture were DTPYC-9 × LM-13, CLQRCY-44 × VQL-1, CML-161 × SML-1 and CML-161× BML-7.

scholarly journals Introgression of Temperate Material to Improve Grain Yield in a Tropical Maize Population

2021 ◽  
Vol 9 (4) ◽  
pp. 39-42
Author(s):  
Justin Abadassi ◽  
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Recurrent Selection ◽  
Block Design ◽  
Tropical Maize ◽  
Maize Population ◽  
Randomized Complete Block Design ◽  
Ear Height

The effect of introgression of the temperate maize population BUGARD on the grain yield of a low-yielding tropical maize population well appreciated for the quality of its grains, NCP80, was studied. NCP80 was crossed with BUGARD to obtain the F1. The BC1 obtained by backcrossing the F1 to NCP80 was random mated thrice. The tropical parent NCP80 and the BC1 (NBN) were evaluated in two tropical locations using a randomized complete block design with three replications. Introgression of the temperate population BUGARD into the tropical population NCP80 significantly increased grain yield. The resulting population, NBN, appeared, moreover, significantly earlier than NCP80 and not significantly different from it for resistance to rust, tropical blight and maize streak, ear height, husk cover and harvest index. NBN may, further, be improved for resistance to maize streak and grain yield by recurrent selection.

scholarly journals AGRONOMIC PERFORMANCE OF IMPROVED MAIZE (Zea mays) CULTIVARS IN SOUTHERN CHAD

2020 ◽  
Vol 8 (6) ◽  
pp. 789-798
Author(s):  
Gapili Naoura ◽  
◽  
Nadjiam Djirabaye ◽  
Hortense Noëlle Apala Mafouasson ◽  
Mamahat Alhabib Hassane ◽  
...  
Keyword(s):  
High Performance ◽  
Block Design ◽  
Environment Interaction ◽  
Days To Flowering ◽  
High Performing ◽  
Maize Cultivars ◽  
Genotype Environment Interaction ◽  
Randomized Complete Block Design ◽  
Ear Height ◽  
New Cultivars

This study was carried out to identify high-performing maize cultivars adapted to the environmental conditions of Southern Chad. Twelve new cultivars associated with two local cultivars often used by farmers in Southern Chad were evaluated in three different environments in a randomized complete block design (RCBD) with three replications. The analysis of variance showed significant differences (p<0.001) between cultivars for the measured traits except for plant height (p=0.157) and ear height (p=0.624). Genotype × environment interaction was also reported significant among cultivars only for days to flowering and number of kernels per row, but yield did not show any statistical difference, although assessed cultivars differed in their relative main performance across the three sites. Potential grain yield showed a negative correlation with days to flowering, ear height, and days to silking. The study revealed different yield performances for the assessed cultivars across different environments. The cultivar 2013 TZEE WPOP DT STR was the highest yield producing cultivars at the combined sites. The cultivars IWD C2 SYN, TZEE WPOP DT C5 STR C5, 2011 TZE YDT STR SYN, and DTE STR YSYN POP C4 showed high-performance cultivars across the different environments and can be therefore recommended for release as new cultivars to farmers of Southern Chad.

scholarly journals Karabuğdayın Yazlık Olarak Isparta Doğal Yağış Koşullarında Farklı Ekim Zamanlarında Yetiştirilme Olanaklarının Araştırılması

2018 ◽  
Vol 6 (1) ◽  
pp. 46 ◽  
Author(s):  
Nimet Kara ◽  
Gökhan Gürbüzer
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Frost Damage ◽  
Damage Effect ◽  
Sowing Time ◽  
Sowing Dates ◽  
Randomized Complete Block Design ◽  
Biological Yield ◽  
Set Up

The study was conducted with aim to investigate growing possibilities without irrigating by taking advantage of spring rains at different sowing times as spring in Isparta conditions. The research was set up as field study during the 2009 and 2010 years according to Randomized Complete Block Design with three replications included six sowing dates 1st March, 10st March, 20th March, 30st March, 9th April and 18st April (control) by using Aktaş buckwheat cultivar. 18st April sowing time was irrigated as control, and the other sowing times was not watered and cultivated depending on natural rains. Buckwheat seeds emergence at 1st and 10st March sowing times, but all the plants after emergence died due to frost damage. Effect of sowing dates on plant height, biological yield and grain yield were statistically significant, and the longest plant height 65.9 cm and 60.0 cm, the highest biological yield 427.3 kg da-1 and 403.7 kg da-1 and grain yield 145.7 kg da-1 and 132.8 kg da-1, respectively, were determined in watered treatment in 18st April in both years (2015 and 2016). Effect of sowing dates on 1000 grain weight, hectoliter weight and protein content were statistically non-significant. It was concluded that buckwheat should be cultivation by watered for Isparta ecological conditions.

scholarly journals Evaluation of durum wheat varieties for yield and yield related traits in highland areas of southern Ethiopia

2021 ◽  
Vol 11 (1) ◽  
pp. 26-28
Author(s):  
S Shibeshi ◽  
D Kassa
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Plant Height ◽  
Analysis Of Variance ◽  
Block Design ◽  
Southern Ethiopia ◽  
Wheat Varieties ◽  
Combined Analysis ◽  
Randomized Complete Block Design ◽  
Positive Correlations

Durum wheat productivity in Ethiopia is hindered by different factors mainly lack of improved adapted varieties for specific locations. This experiment was done to identify the most performing durum wheat varieties in the tested environment. The average productivity of the tested genotypes were evaluated at two locations (Alicho and Analimo) using randomized complete block design with four replication for two consecutive years (2016 and 2017). The experimental material consists of seven improved durum wheat genotypes. The Combined analysis of variance showed significant (P<0.05) difference among tested genotypes on collected parameter indicating the presence of adequate variability. The highest average grain yield recorded was 4446 kg ha-1 from Hitosa variety while the lowest obtained was 3634 kg ha-1 from Denbi variety. Grain yield had strong positive correlations (P<0.01) with plant height, number of seed spike-1 and biomass. Int. J. Agril. Res. Innov. Tech. 11(1): 26-28, June 2021

scholarly journals Makarnalık Buğdayda (Triticum Durum L.) Bölünerek Verilen Üst Gübre Uygulamalarının Verim ve Verim Komponentleri Üzerine Etkisi

2021 ◽  
Vol 9 (11) ◽  
pp. 2041-2048
Author(s):  
Arzu Mutlu
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Yield Components ◽  
Triticum Durum ◽  
Block Design ◽  
Wheat Variety ◽  
Growing Season ◽  
Spike Length ◽  
Randomized Complete Block Design ◽  
The World

This research was conducted with durum wheat variety (Alatay) at farmer conditions in Bozova district of Şanlıurfa province in 2018-19 and 2019-20 growing season according to a randomized complete block design with three replications. This study was conducted to determine the effect of dividing the top fertilizer in different development periods of wheat on grain yield and some yield factors (plant height, spike length, number of grains per spike, grain weight per spike) in order to struggle the drought experienced due to global warming in the world and in our country. According to the research results, it was determined that grain yield, plant height, spike length, number of grains per spike, weight of grains per spike ranged from 347.50-648.33 kg/da, 78.16-98.33 cm, 6.28-6.91 cm, 32.00 number/spike and 64.16 number/spike 2.47 gr/spike and 2.77 gr/spike respectively. The aim of the experiment is to determine how the top-dressing is divided and how the plant benefits from the moisture and nitrogen fertilizer in the soil and how it affects the grain yield and yield components of the plant.

scholarly journals Performance of separated tillers of transplant Aman rice at different levels of urea super granules

2016 ◽  
Vol 40 (4) ◽  
pp. 581-590
Author(s):  
KS Rahman ◽  
SK Paul ◽  
MAR Sarkar
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Harvest Index ◽  
Block Design ◽  
Research Field ◽  
Control Treatment ◽  
Alternative Source ◽  
Randomized Complete Block Design ◽  
Effect Of Age ◽  
Different Levels

An experiment was conducted at the research field of Department of Agronomy, Bangladesh Agricultural University, Mymensingh during June to December 2012 to investigate the effect of age of tiller seedlings, number of tiller seedlings hill-1 and application of urea super granules (USG) on the yield and yield contributing characters of transplant Aman rice (cv. BRRI dhan52). The experiment consisted of two ages of tiller seedlings viz. 25 and 35-days old, three levels of tiller seedlings hill-1 viz. 1, 3 and 5 seedlings hill-1 and three levels of USG viz. 0, 1.8 (55 kg N ha-1) and 2.7g USG (80 kg N ha-1) four hill-1 in every alternate row. The experiment was laid out in a Randomized Complete Block Design (Factorial) with three replications. The highest plant height, number of effective tillers hill-1, number of total tillers hill-1, number of total spikelets panicle-1, number of grains panicle-1, grain yield and harvest index were found in 1.8 g USG applied @ one granule 4-hill-1. The highest number of sterile spikelets panicle-1 was found in control treatment and the lowest in 1.8 g USG. The highest number of effective tillers hill-1, number of total spikelets panicle-1 and grain yield ha-1 was found when 5 tiller seedlings were transplanted hill-1 combined with 1.8 g USG. Application of urea super granules 1.8 g (55 kg N ha-1) at 10 days after transplanting @ one granule 4-hill-1 in every alternate row with 25 day old tiller seedlings using 5 tiller seedlings hill-1 was found beneficial for grain yield of transplant Aman rice. Tiller separation could be an alternative source of seedling during seedling scarcity.Bangladesh J. Agril. Res. 40(4): 581-590, December 2015

scholarly journals Addition of silicate or organic fertilizer increases growth and yield of several varieties of maize in East Lombok, Indonesia

2021 ◽  
Vol 1 (1) ◽  
pp. 13-23
Author(s):  
Andrayani Endang Tatik ◽  
Wayan Wangiyana
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Organic Fertilizer ◽  
Growth And Yield ◽  
Average Growth ◽  
Mean Values ◽  
Maize Varieties ◽  
Randomized Complete Block Design ◽  
Maize Plants

Many have reported that application of Silicon (Si) can alleviate environmental stress and increase grain yield of maize plants under stresses. This study aimed to examine the effects of adding organic or silicate fertilizer on several varieties of maize in rainfed area during a dry season, by conducting field experiment designed with Randomized Complete Block Design testing two treatment factors, i.e. maize varieties (V1= Bisi-2, V2= Srikandi, V3= Pioneer-27) and fertilizer combinations (F1= NPK only, F2= NPK+organic, F3= NPK+silicate). Results indicated that there were significant effects of fertilizer combinations and varieties on growth and yield of several maize varieties, in which the mean values were highest in maize plants fertilized with NPK+silicate fertilizers, except harvest index. Among the varieties, Pioneer-27 (hybrid) yielded the highest followed by Srikandi (open-pollinated) and Bisi-2 (hybrid) yielded the lowest grain weight per plant. However, there were interaction effects of the treatment factors, meaning that there were different responses between varieties of maize to application of organic or silicate fertilizer in addition to NPK fertilizer in terms of plant height, AGR (average growth rate) of plant height and dry grain yield per plant. Grain yield per plant of Pioneer-27 could be increased with application of organic (150.79 g/plant) or silicate (189.43 g/plant) compared with NPK only (133.99 g/plant), while that of Srikandi and Bisi-2 could only be increased by addition of silicate (113.83 g/plant in Srikandi and 103 g/plant in Bisi-2) compared with NPK only (93.77 g/plant in Srikandi and 82.59 g/plant in Bisi-2).

scholarly journals Combining ability of inbred lines of maize and stability of their respective single-crosses

2003 ◽  
Vol 60 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Aurélio Mendes Aguiar ◽  
Luciana Aparecida Carlini-Garcia ◽  
Adelmo Resende da Silva ◽  
Mateus Figueiredo Santos ◽  
Antonio Augusto Franco Garcia ◽  
...  
Keyword(s):  
Grain Yield ◽  
Combining Ability ◽  
Zea Mays L ◽  
Block Design ◽  
Diallel Analysis ◽  
Inbred Lines ◽  
Breeding Programs ◽  
Randomized Complete Block Design ◽  
Single Cross ◽  
Ear Height

The utilization of diallel crosses for identification of superior combinations is a common practice in maize (Zea mays L.) breeding programs. This methodology allows the estimation of the combining ability of genotypes being evaluated. In this work, five inbred lines were evaluated as to their general (GCA) and specific (SCA) combining abilities, by using a complete diallel scheme. The single-crosses produced between these inbred lines were evaluated in seven environments, along with two checks, by using a randomized complete block design. Traits analized were: grain yield, plant height, ear height, ear placement, and prolificacy. A diallel analysis was carried out, following an adaptation of Griffing's method IV, in addition to hybrid stability and adaptability analyses. Significant differences were detected for entries and environments for all traits. The interaction genotype vs. environment was significant for all traits. GCA's were significant for all traits, while SCA's were non-significant only for ear placement. For grain yield, both additive (GCA) and non-additive (SCA) effects were important, while for the remaining traits additive effects were more important. The high yielding single-cross was obtained from the cross of lines L-08-05F and L-38-05D. Those inbred lines showed higher GCA's and their cross also had high SCA; also, it is responsive to environment improvements and reasonably stable. The second in rank high yielding single-cross, L-46-10D x L-08-05F, showed wide adaptability and stability.

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