scholarly journals The Influence of Application Timing of Nitrogen Fertilisers on Yield Components in Oilseed Rape

1970 ◽  
Vol 63 ◽  
Author(s):  
Gina Vasile ◽  
H. V. Halmajan ◽  
G. Ciuboata
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Application Timing

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.

Effects of preflood nitrogen rate and midseason nitrogen timing on flooded rice

2000 ◽  
Vol 134 (4) ◽  
pp. 379-390 ◽  
Author(s):  
R. CARRERES ◽  
J. SENDRA ◽  
R. BALLESTEROS ◽  
J. GARCÍA DE LA CUADRA
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Total N ◽  
Application Timing ◽  
Yield Increase ◽  
Spad Value ◽  
Panicle Number ◽  
Initiation Stage ◽  
Nitrogen Treatments ◽  
Index Value

A field study was conducted to investigate the agronomic performance, nitrogen (N) efficiencies, yield components and yield of rice in Spain for different nitrogen treatments. The experimental variants were six preflood N rates (0, 50, 75, 100, 125 and 150 kg/ha) and three topdressing patterns: (i) non- topdressed, (ii) topdressed with 50 kg N/ha at mid-tillering stage (MT) and (iii) topdressed at panicle initiation stage (PI). The N status of the plant was measured at different growing stages to determine whether a chlorophyll meter would be useful in making N sidedress recommendations. The results showed that grain yield increased with increasing amounts of preflooding N fertilizers up to 100 kg N/ha. The main effect was on panicle number per unit ground area. The effect of additional N supply on yield components and grain yield depended on application timing. Split applications of N did not improve the agronomic efficiency but reduced days to maturity and lodging and increased the harvest index value. Split applications increased grain yield when the total N rate was 150 kg/ha with the second supply at PI. There was a significant but not very good relationship between N content and chlorophyll content (SPAD) values. The regression equation differed significantly depending on growth stage. The SPAD value may determine the need for N topdressing at MT stage, but not at PI. However, the relationship between SPAD value and the rice yield increase from N topdressing application was not very good.

scholarly journals Winter Oilseed Rape (Brassica napus L.) Yield Components in Agro–ecological Conditions of Banja Luka Region

2018 ◽  
Vol 18 (3) ◽  
pp. 175
Author(s):  
Danijela Kondić ◽  
Đurađ Hajder ◽  
Saša Marinković ◽  
Miloš Nožinić
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Seed Weight ◽  
Seed Mass ◽  
Index Number ◽  
Total Production ◽  
Important Species ◽  
Ecological Conditions ◽  
Growing Seasons ◽  
Banja Luka

Due to its numerous agricultural and industrial purposes, oilseed rape is a very important species. The total production of oilseed rape in the Republic of Srpska is faced with noticeable variation throughout years, with an increase in last three years. The oilseed rape yield is strongly influenced by environmental factors. The objective of this study was to analyze yield components of oilseed rape in agro–ecological conditions of Banja Luka. Four oilseed rape hybrids were used: PR46W21, PR46W20, PR46W14 and PR45DO3 in two growing seasons: 2012/13 and 2013/14. Yield components tested were: pod mass (g), seed mass per pod (g), pod index (%), number of seeds per pod and 1000–seed weight (g). Factorial 2×4 ANOVA and Fisher's LSD test were used to analyze data, with growing seasons (years) and hybrids as factors. Growing season significantly affected the pod mass (g), total seed mass per pod (g) and 1000–seed weight. Generally, higher yield component values were obtained in the second examined year (2013/14).

scholarly journals Sowing Date and Rate Effect on Winter Oilseed Rape (Brassica napus L.) Yield Components’ Formation

2016 ◽  
Vol 70 (6) ◽  
pp. 384-392 ◽  
Author(s):  
Oskars Balodis ◽  
Zinta Gaile
Keyword(s):  
Oilseed Rape ◽  
Yield Components ◽  
Seed Weight ◽  
Plant Density ◽  
Plant Productivity ◽  
Sowing Date ◽  
Individual Plant ◽  
Seed Number ◽  
Winter Oilseed Rape ◽  
Pod Number

Abstract Crop yield per area is the product of plant density and productivity of an individual plant. Plant density and the time of winter oilseed rape sowing influences yield components (parameters of individual plant productivity), such as pod number per plant, seed number per pod, plant productivity, seed weight, and plant branching. The aim of this three-year (2008–2010) study was to investigate winter oilseed rape yield components depending on sowing date (five sowing dates) and sowing rate (four sowing rates for each variety) as initial cause of plant density at harvest for two type winter oilseed rape varieties (open pollinated ‘Californium’ and hybrid ‘Excalibur’). Field trials were carried out at the Research and Study Farm “Vecauce” of the Latvia University of Agriculture. Winter oilseed rape yield components (pod number per plant and seed number per pod, plant productivity (seed number per plant and plant productivity in g) as well as the number of primary branches per plant) were affected (p < 0.05) by sowing date and rate for both varieties. In general, no significant effect of sowing rate on 1000-seed weight was observed (p > 0.05), but sowing date influenced this component significantly (p < 0.05). A yield compensation mechanism was demonstrated by significant (p < 0.05) negative correlations between plant density at harvest and parameters of individual plant productivity.

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