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

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.

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

10.21203/rs.3.rs-401021/v1 ◽

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.

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Sorghum-pigeonpea intercropping and the effects of plant population density

The Journal of Agricultural Science ◽

10.1017/s0021859600029269 ◽

1980 ◽

Vol 95 (1) ◽

pp. 51-58 ◽

Cited By ~ 43

Author(s):

M. Natarajan ◽

R. W. Willey

Keyword(s):

Spatial Distribution ◽

Population Density ◽

Primary Objective ◽

Plant Population ◽

Population Densities ◽

Sole Crop ◽

Plant Population Density ◽

Distribution Of Roots

SummaryAn intercropping experiment is described in which three plant population densities of an early sorghum (82 days) were factorially combined with three plant population densities of a later-maturing pigeonpea (173 days) in a standard 2 sorghum:1 pigeonpea row arrangement. Sorghum growth was not affected by the presence of pigeonpea, and the farmers' primary objective of maintaining a ‘full’ sorghum yield was achieved if the density of the intercropped sorghum was equivalent to the sole crop optimum.The spatial distribution of roots after 30 and 60 days of growth did not appear to be altered by intercropping, and roots of the two crops were found to intermingle freely.

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Production of BRS Itaim cowpea cultivar based on plant population density

Scientia Agraria Paranaensis ◽

10.18188/sap.v18i4.22100 ◽

2019 ◽

pp. 377

Author(s):

Laerte Gustavo Pivetta ◽

Dácio Olibone ◽

Edvan Costa da Silva ◽

Ana Paula Olibone ◽

Gilberto Keres ◽

...

Keyword(s):

Population Density ◽

Grain Yield ◽

Block Design ◽

Plant Population ◽

Large Area ◽

Population Densities ◽

Mato Grosso ◽

Randomized Block Design ◽

Plant Population Density ◽

Pod Length

Cowpea has great potential for cultivation and rotation in Mato Grosso State and in Brazilian Cerrado due to the large area available in these locations in the off-season. The aim of the current study is to analyze the yield of cowpea (BRS Itaim cultivar) grown in non-irrigated soil in Sorriso County-MT, based on plant population density. The experiment was carried out in commercial area, on March 8, 2015; it followed a randomized block design, with six population densities and four replicates. Population densities comprising 80, 120, 160, 200, 240, and 280 thousand plants per hectare were used in the experiment. Experimental plots encompassed four 5-meter-long rows with 0.45-meter spacing between them. Final plant stand (plants ha-1), number of pods per plant, number of grains per pod, pod length (cm), weight of one hundred grains (g) and grain yield (kg ha-1) in the useful plot were evaluated at harvest time. The number of pods per plant has linearly decreased as population density increased. The number of seeds per pod, pod length and weight of one hundred grains did not change due to population density. Population density of 230 thousand plants ha-1 has enabled the highest grain yield under the tested conditions.

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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 ◽

10.21931/rb/2019.04.02.5 ◽

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.

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

The Journal of Agricultural Science ◽

10.1017/s0021859600037242 ◽

1977 ◽

Vol 88 (3) ◽

pp. 567-576 ◽

Cited By ~ 4

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.

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