Effects of previous cropping on seed yield and yield components of oil-seed rape (Brassica napus L.)

1997 ◽  
Vol 6 (3-4) ◽  
pp. 215-223 ◽  
Author(s):  
Klaus Sieling ◽  
Olaf Christen ◽  
Bahadour Nemati ◽  
Herbert Hanus
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Yield Components ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Yield And Yield Components

A note on sampling technique for winter oil-seed rape (Brassica napus L.)

1982 ◽  
Vol 99 (1) ◽  
pp. 225-227 ◽  
Author(s):  
D. H. Scarisbrick ◽  
A. Clewer ◽  
R. W. Daniels
Keyword(s):  
Brassica Napus ◽  
Oilseed Rape ◽  
Nitrogen Fertilizer ◽  
Yield Components ◽  
Sampling Technique ◽  
Brassica Napus L ◽  
Plant Weight ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Sampling Problems

The response of three spring cultivars of oilseed rape to five levels of nitrogen fertilizer (0 to 200 kg/ha) was studied during 1978–9 (Scarisbrick, Daniels & Alcock, 1981). Sampling problems, practical difficulties of measuring yield components, and the high co-efficients of variation for these data were discussed. During the course of further investigations on the winter cultivar Jet Neuf (established on approximately 75000 ha in the U. K. during 1980–1) within-plot variability for plant weight was assessed in order to indicate the size of sample necessary to compare treatment means.

Stability of Yield Components from Winter Oil-Seed Rape (Brassica napus L.)

1987 ◽  
Vol 158 (2) ◽  
pp. 107-113 ◽  
Author(s):  
H.-P. Sierts ◽  
G. Geisler ◽  
J. Leon ◽  
W. Diepenbrock
Keyword(s):  
Brassica Napus ◽  
Yield Components ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape

THE EFFECTS OF LEAF REMOVAL ON YIELD AND YIELD COMPONENTS OF BRASSICA NAPUS

1978 ◽  
Vol 58 (4) ◽  
pp. 1103-1105 ◽  
Author(s):  
J. M. CLARKE
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Field Conditions ◽  
Leaf Removal ◽  
Brassica Napus L ◽  
Yield And Yield Components

The effects of time of leaf removal on Brassica napus L. were studied under field conditions at Saskatoon in 1976 and at Swift Current in 1977. Leaf removal at the start of flowering reduced the number of pods per plant, increased seed weight, and reduced seed yield. Leaf removal at the end of flowering did not affect yield or its components.

The effect of Terpal on the yield and yield components of oil-seed rape (Brassica napus L.)

1983 ◽  
Vol 100 (3) ◽  
pp. 745-748 ◽  
Author(s):  
J. F. Chapman ◽  
D. H. Scabisbrick ◽  
R. W. Daniels
Keyword(s):  
Plant Height ◽  
Yield Components ◽  
Quaternary Ammonium Compound ◽  
Ammonium Compound ◽  
Brassica Napus L ◽  
Mepiquat Chloride ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Wide Range ◽  
Yield And Yield Components

The objective of this study was to examine the effect of the chemical growth regulator Terpal (a mixture of mepiquat chloride and ethephon or 2 chloroethyl phosphonic acid) on the pattern of branching, plant height and yield components of winter oil-seed rape (cv. Jet Neuf). Mepiquat chloride (a quaternary ammonium compound with similar antigibberellin properties to cycocel) was developed as a morphoregulator for cotton where it has been shown to reduce plant height, shorten internodes and increase boll retention (Willard et al. 1977). The activity of ethephon has been attributed to its release of ethylene which influences a wide range of developmental processes, for example fruit abscission and ripening (Chatterjee, 1977; Gvozdenovic, Dulic & Slavic, 1978), growth retardation (Van Andel & Verkerke, 1978) and also the extent of lodging in cereals (Hill, Joice & Squires, 1982).

The Effect of Sowing Date on the Yield and Yield Components of Spring Oil-Seed Rape

1981 ◽  
Vol 97 (1) ◽  
pp. 189-195 ◽  
Author(s):  
D. H. Scarisbrick ◽  
R. W. Daniels ◽  
Mary Alcock
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Yield Components ◽  
Sowing Date ◽  
Main Stem ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Yield And Yield Components

SUMMARYThree spring oil-seed rape cultivars were drilled on five dates during 1979 and 1980. Delayed drilling (1) reduced seed yield, (2) increased the main stem contribution to seed production, and (3) increased the percentage of damaged pods at harvest. The results indicated that cultivars similar to those used in this trial should be drilled between the 3rd week of March and mid-April.

The effect of drilling date on the growth and yield of oil-seed rape (Brassica napus L.)

1987 ◽  
Vol 108 (1) ◽  
pp. 195-200 ◽  
Author(s):  
P. J. W. Lutman ◽  
Fiona L. Dixon
Keyword(s):  
Brassica Napus ◽  
Seed Yield ◽  
Dry Weight ◽  
Early Summer ◽  
Growth And Yield ◽  
Practical Significance ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Autumn And Winter

SummaryThe effects of drilling date (18 August–22 September) on the growth and yield of oil-seed rape (Brassica napus) was studied in a series of five experiments over three seasons. Autumn and winter growth of the crop, as measured by dry weight of tops and leaf area, was severely reduced by delayed drilling, especially if it was later than 10 September. However, during the spring and early summer the differences in crop weight due to drilling date declined and in four of the five experiments there were no detectable differences in seed yield between early- and late-sown crops. The yield decline in the fifth trial was small. Measurements of components of yield showed that later-sown crops had fewer pods per plant and slightly smaller seeds but apparently more seeds per pod. The practical significance and reasons for the recovery of late drilled crops from early poorer growth are discussed.

Quantitative analysis of the growth, development and distribution of flowers and pods in oil seed rape (Brassica napus L.)

1975 ◽  
Vol 85 (1) ◽  
pp. 103-110 ◽  
Author(s):  
T. O. Tayo ◽  
D. G. Morgan
Keyword(s):  
Quantitative Analysis ◽  
Brassica Napus ◽  
Growth And Development ◽  
Brassica Napus L ◽  
Flower Opening ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Whole Plant ◽  
Growth Development

SUMMARYThe growth and development of single plants of oil seed rape, variety Zollerngold, are described quantitatively and particular attention paid to the sequence and pattern of flower and pod production on the different inflorescences. The period of flower opening over the whole plant spanned an average of 26 days and more than 75% of the pods which were retained to maturity were formed from flowers which opened within 14 days of anthesis. Most of these flowers were found on the terminal raceme and on the basal and middle regions of the axillary inflorescences arising from the uppermost three nodes.

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