FERTILIZATION AND PLANT POPULATION DENSITY EFFECTS ON THE PRODUCTIVITY OF OPUNTIA FICUS-INDICA IN NORTHEAST BRAZIL

2006 ◽  
pp. 189-192
Author(s):  
M.V.F. Santos ◽  
J.C.B. Dubeux Jr. ◽  
J.N. Melo ◽  
D.C. dos Santos ◽  
I. Farias ◽  
...  
Keyword(s):  
Population Density ◽  
Plant Population ◽  
Northeast Brazil ◽  
Opuntia Ficus Indica ◽  
Density Effects ◽  
Plant Population Density

Row cover and population density effects on yield of bell peppers in south coastal British Columbia

1992 ◽  
Vol 72 (3) ◽  
pp. 901-909 ◽  
Author(s):  
M. M. Gaye ◽  
P. A. Jolliffe ◽  
A. R. Maurer
Keyword(s):  
Population Density ◽  
Fruit Size ◽  
Plant Population ◽  
Research Station ◽  
Density Effects ◽  
Row Covers ◽  
Net Returns ◽  
Bell Peppers ◽  
Plant Population Density ◽  
Density Treatment

Row cover and plant population density effects were studied at the Agriculture Canada Research Station, Agassiz, BC in 1988 and 1989. Bell pepper plants (Ace Hybrid) were transplanted into twin rows (0.45 m apart) on raised beds (1.8-m centers) at five population densities of 1.39, 1.85, 2.78, 5.56 and 11.1 plant m−2. For 7 wk in 1988 or 8 wk in 1989, subplots were either covered or not covered with slit clear polyethylene tunnels. A nonlinear regression model was used to define yield-population density responses. Row covers enhanced early and overall yields in 1988 and overall yield in 1989. Vegetative and reproductive yields (kg plant−1) declined with increasing plant population density. Yields were directly related to population density when measured on a land-area basis. Maximum fruit yield (7.9 kg m−2) was obtained at the highest population density. Treatment influences on fruit size were small and did not affect horticultural quality. An economic analysis showed that net returns were greatest with plants grown under row covers at the highest population density.Key words: Capsicum annuum L., field bell peppers, population density, row covers

Plant Population Density Effects on Maize Inbred Lines Grown in Short‐Season Environments

Crop Science ◽  
1998 ◽  
Vol 38 (1) ◽  
pp. 104-108 ◽  
Author(s):  
A. M. Modarres ◽  
R. I. Hamilton ◽  
M. Dijak ◽  
L. M. Dwyer ◽  
D. W. Stewart ◽  
...  
Keyword(s):  
Population Density ◽  
Inbred Lines ◽  
Plant Population ◽  
Density Effects ◽  
Maize Inbred Lines ◽  
Short Season ◽  
Plant Population Density

Frost damage to winter wheat in the UK: the effect of plant population density

2004 ◽  
Vol 21 (1) ◽  
pp. 105-115 ◽  
Author(s):  
J.M Whaley ◽  
E.J.M Kirby ◽  
J.H Spink ◽  
M.J Foulkes ◽  
D.L Sparkes
Keyword(s):  
Population Density ◽  
Winter Wheat ◽  
Frost Damage ◽  
Plant Population ◽  
Plant Population Density ◽  
The Uk

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.

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