scholarly journals The response of Faba bean (Vicia faba L.) varieties as evaluated by varied plant population densities in the highlands of Arsi Zone, Southeastern Ethiopia

Bionatura ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 846-851
Author(s):  
Dereje Dobocha ◽  
Wogayehu Worku ◽  
Debela Bekela ◽  
Zenebe Mulatu ◽  
Fasil Shimeles ◽  
...  
Keyword(s):  
Population Density ◽  
Seed Yield ◽  
Faba Bean ◽  
Plant Population ◽  
Test Weight ◽  
Total Biomass ◽  
Population Densities ◽  
Plant Populations ◽  
Significant Difference ◽  
Plant Population Density

Field experiments were carried out in 2016 and 2017 cropping seasons under on-farm conditions in Lemuna Bilbilo District, Southeastern Ethiopia to evaluate the effects of three varieties Degaga, Gora, Moti, and six plant populations (10, 25 (control), 30,50, 70, and 90 plants m-2) on faba bean specific yield and yield components. The experiments were laid out in a randomized complete block design in split plot arrangement in which varieties were assigned to main plots and plant populations to subplots with three replications. The year combined analysis of data revealed that seed yield, total biomass yield and test weight of seed were significantly (p<0.05) affected by varieties and plant population densities m-2. The highest seed yield (4649, 4594 and 4162 kg ha-1) was obtained at 90,70 and 50 plant m-2 for Degaga, Moti and Gora varieties respectively but, no significant difference between control for Degaga and Moti varieties. The highest total biomass of 9 t ha-1 was recorded from the highest 90 plant population m-2 though not significantly different to the total biomass obtained from 70, 50 and 25 (control) plants m-2. Gora variety significantly recorded the highest test weight of seed (889.2g) than the rest Degaga and Moti varieties. In short, founded on studied agronomic parameters of faba bean, 25 plant population density m-2 was economically recommended for Degaga and Moti varieties whereas, 50 plant population density m-2 was for Gora variety.

The effect of varying plant population density on the seed yield of Navy beans (Phaseolus vulgaris)in south-east Enland

1977 ◽  
Vol 88 (3) ◽  
pp. 567-576 ◽  
Author(s):  
D. H. Scarisbrick ◽  
J. M. Wilkes ◽  
R. Kempson
Keyword(s):  
Phaseolus Vulgaris ◽  
Population Density ◽  
Seed Yield ◽  
Plant Density ◽  
Growing Season ◽  
Plant Population ◽  
Population Densities ◽  
Growing Seasons ◽  
Navy Beans ◽  
Plant Population Density

SUMMARYNavy beans were precision drilled in 1973–5 at a range of plant population densities. Within each growing season the density treatments did not influence seed yield, but mean yields differed significantly between years. The results suggest that cultivars similar to Purley King can only be regarded as a reliable break crop in a season such as 1973 which was slightly warmer and drier in mid-summer than average. Although the rate of drying increased with increasing plant density in two of the growing seasons, no practical advantages are proposed.

scholarly journals Effects of population density on cauliflower crop (Brassica oleracea L. var. botrytis)

1981 ◽  
Vol 38 (1) ◽  
pp. 1-10
Author(s):  
Keigo Minami ◽  
Ricardo Victoria Fº
Keyword(s):  
Population Density ◽  
Brassica Oleracea ◽  
Plant Population ◽  
Population Densities ◽  
Plant Population Density ◽  
Brassica Oleracea L ◽  
Quality Weight

An experiment was carried out to study the effects of the following population densities cauliflowers (plants per ha): 20,833 (0.60 m x 0.80 m), 25,641 (0.60 m x 0.65 m), ....37.037 (0.60 m x 0.45 m) , 55.555 (.0.60 m x 0.30 m), and 111,111 (0,60 m x 0,15 m) ; variety Snow ball. It was concluded that the effects of plant population density are greater on curd quality (weight and size) than on production per ha. The best plant population density to produce cauliflowers curd for Brazil market is from 20,000 to 25,000 plants/ha while for mini-curd is above 55,000 plants/ha.

Grain Yield Gains and Associated Traits in Tropical X Temperate Maize Germplasm Under High and Low Plant Density

2021 ◽  
Author(s):  
Vince Ndou ◽  
Edmore Gasura ◽  
Pauline Chivenge ◽  
John Derera
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Plant Density ◽  
Plant Population ◽  
Population Densities ◽  
Genetic Gains ◽  
Maize Germplasm ◽  
High Plant Density ◽  
Number Of Leaves ◽  
Plant Population Density

Abstract Development of ideal breeding and crop management strategies that can improve maize grain yield under tropical environments is crucial. In the temperate regions, such yield improvements were achieved through use of genotypes that adapt high plant population density stress. However, tropical germplasm has poor tolerance to high plant population density stress, and thus it should be improved by temperate maize. The aim of this study was to estimate the genetic gains and identify traits associated with such gains in stable and high yielding temperate x tropical hybrids under low and high plant population densities. A total of 200 hybrids derived from a line x tester mating design of tropical x temperate germplasm were developed. These hybrids were evaluated for grain yield and allied traits under varied plant population densities. High yielding and stable hybrids, such as 15XH214, 15XH215 and 15XH121 were resistant to lodging and had higher number of leaves above the cob. The high genetic gains of 26% and desirable stress tolerance indices of these hybrids made them better performers over check hybrids under high plant population density. At high plant population density yield was correlated to stem lodging and number of leaves above the cob. Future gains in grain yield of these hybrids derived from temperate x tropical maize germplasm can be achieved by exploiting indirect selection for resistance to stem lodging and increased number of leaves above the cob under high plant density conditions.

Optimum plant population density for chickpea and dry pea in a semiarid environment

2003 ◽  
Vol 83 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Y. T. Gan ◽  
P. R. Miller ◽  
B. G. McConkey ◽  
R. P. Zentner ◽  
P. H. Liu ◽  
...  
Keyword(s):  
Population Density ◽  
Pisum Sativum ◽  
Cicer Arietinum ◽  
Seed Yield ◽  
Plant Population ◽  
Grain Legume ◽  
Wheat Stubble ◽  
Plant Population Density ◽  
Field Emergence ◽  
Seed Yields

Chickpea (Cicer arietinum L.), an annual grain legume, is being broadly included in cereal-based cropping systems throughout the semiarid Canadian prairies, but information on optimum plant population density (PPD) has not been developed for this region. This study, which was conducted from 1998 to 2000 in southwestern Saskatchewan, determined the effect of PPD on field emergence, seed yield and quality, and harvestability of kabuli and desi chickpea compared with dry pea (Pisum sativum L.). Seed yields of all legumes increased with increasing PPD when the crops were grown on conventional summerfallow. The PPD that produced the highest seed yields ranged from 40 to 45 plants m-2 for kabuli chickpea, from 45 to 50 plants m-2 for desi chickpea, and from 75 to 80 plants m-2 for dry pea. When the legumes were grown on wheat stubble, the PPD that gained optimum seed yield ranged from 35 to 40 plants m-2 for kabuli chickpea, from 40 to 45 plants m-2 for desi chickpea, and from 65 to 70 plants m-2 for dry pea. The proportion of large-sized (>9-mm diameter) seed in the harvested seed was >70% when the kabuli chickpea was grown on summerfallow regardless of PPD, whereas the large-seed proportion decreased with increasing PPD when the crop was grown on wheat stubble. Increases in PPD advanced plant maturity by 1.5 to 3.0 d and increased the height of the lowest pods from the soil surface by 1.4 to 2.0 cm (or 5 to 10%), with desi chickpea receiving the greatest benefits from increased PPD. The percentage of plants established from viable seeds per unit area decreased substantially as PPD increased, with kabuli chickpea emergence decreasing from 90% at PPD = 20 plants m-2 to 72% at PPD = 50 plants m-2, from 81 to 69% for desi type, and from 83 to 59% for dry pea . The reason for the low field emergence with increased PPD is unknown, but methods which lead to improved field emergence represent a great opportunity to increase seed yield and reduce production costs for both chickpea and dry pea in this semiarid region. Key words: seed size, Cicer arietinum, Pisum sativum, seeding rate, summerfallow

Response of flax and lentil to seeding rates, depths and spring application of dinitroanaline herbicides

1994 ◽  
Vol 74 (4) ◽  
pp. 875-882 ◽  
Author(s):  
D. A. Wall
Keyword(s):  
Population Density ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Field Studies ◽  
Test Weight ◽  
Seeding Rate ◽  
Population Densities ◽  
Herbicide Treatment ◽  
Herbicide Treatments ◽  
One Year

Two field studies were conducted at Morden, Manitoba in 1992 and 1993 to investigate the effect of seeding depth and seeding rate on flax and lentil recovery following spring application of dinitroanaline herbicides. In the first study, the effect of seeding depth on flax and lentil tolerance to ethalfluralin, pendimethalin and trifluralin, applied preplant soil incorporated at 1.1 kg a.i. ha−1 in the spring, was investigated. Deep seeding (6 cm) reduced flax population density by 59%, averaged over 2 yr, when compared with shallow seeding (3 cm). Ethalfluralin, pendimethalin and trifluralin, reduced flax population density, but the effect of herbicide was less when flax was seeded shallow. Trifluralin and ethalfluralin reduced flax yield more when the crop was seeded deep than when seeded shallow. Herbicide treatments had no effect on flax yield when the crop was seeded shallow. Ethalfluralin and trifluralin reduced lentil population density and seed yield in one year only. Pendimethalin did not reduce lentil population density or seed yield. Deep seeding did not affect lentil population density, seed yield or phytotoxicity of dinitroanalines in this crop. In a second study, flax and lentil were seeded at 15, 30, 45, 60 and 90 kg ha−1 at 3 and 6 cm planting depths to assess the effect of seeding depth and seeding rate on crop recovery following spring application of ethalfluralin. In ethalfluralin treated plots, seeding rate had to be increased from 60 to > 90 kg ha−1 to achieve similar population densities as 45 kg ha−1 in untreated plots. Flax yields were unaffected by ethalfluralin when the crop was seeded shallow, but yields were reduced significantly when the crop was seeded deep. Lentil population density increased linearly with seeding rate. Lentil population density was unaffected by seeding depth or herbicide treatment. Ethalfluralin did not reduce lentil yield in either year. Lentil yields increased with seeding rate up to 30 kg ha−1, with little further increase in yield for seeding rates between 30 and 90 kg ha−1. Key words:Lens culinaris, Linum usitatissimum, population density, seeding depth, seeding rate, yield, seed test weight, ethalfluralin, pendimethalin, trifluralin

Effects of Population Density on Yields of Two Soyabean (Glycine max) Varieties in Ghana Forest Zone

1977 ◽  
Vol 13 (3) ◽  
pp. 235-240 ◽  
Author(s):  
D. M. Osafo
Keyword(s):  
Glycine Max ◽  
Population Density ◽  
Seed Yield ◽  
Plant Population ◽  
Main Stem ◽  
Forest Zone ◽  
Plant Population Density ◽  
Crop Stand

SUMMARYSeed yield in two soyabean varieties—one tall (Improved Pelican) and one short (V/1)—was mainly determined by the total number of main stem and branch pods produced when plant population density varied from 5·4 to 16·2 plants/m2. An increasing percentage of the pods was found on the main stems of Improved Pelican as the crop stand became denser.

Impact of cultivar, row spacing and seeding rate on ascochyta blight severity and yield of chickpea

2007 ◽  
Vol 87 (2) ◽  
pp. 395-403 ◽  
Author(s):  
K. F. Chang ◽  
H. U. Ahmed ◽  
S. F. Hwang ◽  
B. D. Gossen ◽  
R. J. Howard ◽  
...  
Keyword(s):  
Population Density ◽  
Disease Severity ◽  
Seed Yield ◽  
Plant Density ◽  
Ascochyta Blight ◽  
Plant Population ◽  
Row Spacing ◽  
Seeding Rate ◽  
Plant Population Density ◽  
Wide Row Spacing

Field trials to assess the impact of chickpea type (desi vs. kabuli), row spacing and seeding rate on ascochyta blight of chickpea were conducted over 2 yr at Brooks, Alberta. A compound-leaved desi chickpea cultivar and unifoliate kabuli cultivar were sown at 20, 30 and 40 cm row spacing, and at three seeding rates (20, 40 and 60 seeds per 3 m row). Most of the variation in disease severity was associated with differences between the cultivars. Seeding rate, row spacing and their interactions had substantially smaller effects on ascochyta blight in comparison with cultivar effects. Late in the growing season, blight severity was consistently lower in the desi than the kabuli cultivar. Wide row spacing and low seeding rate reduced ascochyta blight severity and increased seed yield per plant. Wide row spacing in the first year reduced the seed yield per hectare, but row spacing did not significantly affect yield in 2005. Low in-row seeding rates increased yield only in 2004. There was a positive linear relationship between plant density and blight severity, and a negative relationship between yield per plant and both plant density and disease severity. We conclude that reduced plant population density could be one tool in a program to manage ascochyta blight of chickpea. Key words: Cicer arietinum, plant population density, ascochyta blight, yield

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