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

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.

Compensation of oil-seed rape (Brassica napus L.) plants after damage to their buds and pods

1979 ◽  
Vol 92 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Ingrid H. Williams ◽  
J. B. Free
Keyword(s):  
Brassica Napus ◽  
Yield Loss ◽  
Plant Size ◽  
Meligethes Aeneus ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape ◽  
Early Removal ◽  
The Relationship ◽  
Pollen Beetles

SummaryThe relationship has been investigated between the yield of oil-seed rape (Brassica napus L.) plants and (a) the proportion of podless stalks, (b) the proportion of pods infested by seed weevil larvae and (c) the effect of removing a proportion of buds and pods. Plants compensated for damage and, although late removal of buds or pods sometimes caused greater yield loss than early removal, only plants with more than 60% podless stalks or buds removed had diminished yields. The numbers of podless stalks per plant increased with plant size. Removal of 60 % of a plant's pods caused no yield loss; in the field a maximum infestation of only 25% of the plant's pods with seed weevil larvae occurred. The results are discussed in relation to damage by pollen beetles (Meligethes aeneus Fab.) and seed weevils (Ceutorhynch.ua ossimilis Payk.)

Effect of some Herbicides on Oil Seed Rape (Brassica Napus L.) and Associated Weeds

1987 ◽  
Vol 158 (4) ◽  
pp. 236-240 ◽  
Author(s):  
A. F. Ibrahim ◽  
Sh. A. Shaban ◽  
El. A. El-Metwally
Keyword(s):  
Brassica Napus ◽  
Brassica Napus L ◽  
Oil Seed ◽  
Oil Seed Rape
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