Effect of plant population and harvesting time on growth and dry matter production of potato (Solanum tuberosum L.)

2007 ◽  
Vol 4 (1) ◽  
Author(s):  
T Hirpa
Keyword(s):  
Solanum Tuberosum ◽  
Dry Matter ◽  
Plant Population ◽  
Dry Matter Production ◽  
Harvesting Time ◽  
Matter Production

Effects of plant population density and rectangularity on the growth and yield of poppies (Papaver somniferum)

1990 ◽  
Vol 115 (2) ◽  
pp. 239-245 ◽  
Author(s):  
B. Chung
Keyword(s):  
Population Density ◽  
Dry Matter ◽  
Plant Density ◽  
Plant Population ◽  
Growth And Yield ◽  
Dry Matter Production ◽  
Matter Production ◽  
Average Wind ◽  
Total Head ◽  
Plant Population Density

SUMMARYGrowth, yield and incidence of lodging of poppies were studied in Tasmania at 10–200 plants/m2 and at nominal rectangularities (within-row: between-row spacing) ranging from 1:1 to 10:1. In 1983/84 and 1988/89, there were asymptotic relationships between plant population density and both total dry-matter production and total head (capsule plus seed) yield at maturity. In 1983/84, a season with above-average wind, the incidence of lodging increased as density increased to > 50 plants/m2; morphine concentration decreased as density increased to > 100 plants/m2. This resulted in parabolic relationships between yield of erect (machine-harvestable) heads and yield of morphine from erect heads with plant density, the maximum morphine yield from erect heads being achieved at 70 plants/m2. In 1988/89, a season with below-average wind, the effects of lodging were less severe at high densities and the components of ‘erect’ yield were adequately fitted by an asymptotic function. Rectangularity of 1:1 gave higher total dry matter production, total head yield, yield of erect heads and morphine yield from erect heads than 4:1 and 10:1. Since calm conditions similar to those of 1988/89 occur only once in every 4 years, growers should be encouraged to establish c. 70 plants/m2. As most commercial crops in Tasmania are drilled in 150–175 mm rows, growing at 70 plants/m2 to maximize the effect of plant density would also approximate to the ideal rectangularity (2:1 in this case).

Effect of plant density and row spacing on the yield of chickpea (cv. Tyson) grown on the Darling Downs, south-eastern Queensland

1989 ◽  
Vol 29 (2) ◽  
pp. 241 ◽  
Author(s):  
DF Beech ◽  
GJ Leach
Keyword(s):  
Population Density ◽  
Seed Yield ◽  
Dry Matter ◽  
Plant Population ◽  
Growth And Yield ◽  
Dry Matter Production ◽  
Row Spacing ◽  
South Eastern ◽  
Matter Production ◽  
Plant Population Density

Growth and yield of chickpea, Cicer arietinum cv. Tyson, were studied at 4 row spacings (180, 360, 530 and 710 mm) and 4 plant population densities (14, 28, 42 and 56 plants m-2) in factorial combination in a wet and a dry growing season on a vertisol at Dalby, south-eastern Queensland. In both years, row spacing had only a small effect on above-ground dry matter production and yield, and there were no significant interactions between row spacing and plant population density. Above-ground dry matter production increased significantly with increase in plant population density for about 120 days after sowing. Seed yield increased significantly from 104 to 126 g m-2 in the drier season (106 mm rain, May-October) with increase in plant population density from 14 to 56 plants m-2. In the wetter season (286 mm rain, May- October), the corresponding trend in yield was from 262 to 287 g m-2. The response was attributed chiefly to larger seed size in the wet year, and higher harvest index in the dry year. We conclude that a density of at least 40 plants m-2 is required to attain maximum seed yield in southeastern Queensland. Although row spacing had no significant effect on yield, our earlier research indicated potential benefits from narrow row spacing, particularly for mechanised crop production.

Effect of sowing rate and sowing method on the establishment, yield and survival of irrigated lucerne at Kyabram, Victoria

1975 ◽  
Vol 15 (72) ◽  
pp. 64 ◽  
Author(s):  
A Roufail
Keyword(s):  
Medicago Sativa ◽  
Dry Matter ◽  
Plant Population ◽  
Dry Matter Production ◽  
Seeding Rate ◽  
Aerial Growth ◽  
Matter Production

Hunter River lucerne (Medicago sativa) was sown at 6.7, 9, 13.4, 17.9, 22.4 or 26.9 kg ha -1, broadcast or in 15, 30 or 45 cm rows under irrigation. Seeding rate did not affect dry matter production. There were no significant differences in dry matter production between sowing broadcast or in 15 cm rows, but 30 cm and 45 cm rows produced less dry matter than 15 cm rows (P < 0.01 ). Seeding rates and sowing methods affected the plant population, which affected the morphology of the roots and the aerial growth.

Dry matter production of green pea influenced by herbicides

2005 ◽  
Vol 33 (1) ◽  
pp. 377-380
Author(s):  
Erzsébet Nádasy ◽  
Gábor Wágner
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Matter Production ◽  
Green Pea
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