Dual-purpose canola—a new opportunity in mixed farming systems

2008 ◽  
Vol 59 (4) ◽  
pp. 291 ◽  
Author(s):  
J. A. Kirkegaard ◽  
S. J. Sprague ◽  
H. Dove ◽  
W. M. Kelman ◽  
S. J. Marcroft ◽  
...  
Keyword(s):  
Seed Yield ◽  
Compensatory Growth ◽  
Field Experiments ◽  
Yield Loss ◽  
Growth Yield ◽  
Farming Systems ◽  
Gross Margin ◽  
Dual Purpose ◽  
Trade Offs ◽  
Spring Canola

The term dual-purpose canola describes the use of a canola crop for forage before seed production. It could potentially provide a profitable and flexible break-crop option for mixed farms, but there have been no studies to test the concept in Australia. We investigated the feasibility of using canola in this way in field experiments near Canberra, Australia, from 2004 to 2006, using European winter and mid–late maturing Australian spring canola varieties. Winter varieties sown from early March to mid-April produced 2.5–5.0 t/ha of biomass providing 0.3–3.5 t/ha of high-quality forage grazed by sheep in winter. The spring varieties produced similar amounts of vegetative biomass from April sowing but were unsuited to the earlier March sowing as they flowered in early winter and did not recover from grazing. The canola forage was readily eaten by sheep; alkane-based estimates of diet composition indicated that >85% of the organic matter intake consisted of canola. Canola forage was also highly digestible (86–88%) and Merino hoggets grew at 210 g/day from a dry matter intake of 1530 g DM/day. The canola generally recovered well when grazed in winter before bud elongation. Delays in flowering associated with heavy grazing ranged from 0 to 4 days when grazed before buds were visible, to 28 days if the crop had commenced flowering. Significant delays in flowering (>14 days) associated with winter grazing did not reduce seed yield or oil content when favourable spring conditions allowed compensatory growth. Yield loss was observed when winter and spring conditions were unfavourable for compensatory growth, or if grazing continued too late into spring (late September) irrespective of seasonal conditions. The yield loss was more than offset by the value of the grazed forage and the mean gross margin for dual-purpose canola over the four experiments was $240 to $500 higher than for grain-only canola depending on the value assumed for the forage. The study indicates there is considerable scope to capture value from grazing early-sown canola crops during winter without significant, uneconomic trade-offs with seed yield. Further investigations in other medium to high rainfall environments in southern Australia are warranted.

Refining crop and livestock management for dual-purpose spring canola (Brassica napus)

2012 ◽  
Vol 63 (5) ◽  
pp. 429 ◽  
Author(s):  
J. A. Kirkegaard ◽  
S. J. Sprague ◽  
P. J. Hamblin ◽  
J. M. Graham ◽  
J. M. Lilley
Keyword(s):  
Brassica Napus ◽  
Field Experiments ◽  
Yield Loss ◽  
Herbicide Tolerance ◽  
Growth Stages ◽  
Dual Purpose ◽  
Residual Biomass ◽  
Mixed Farming ◽  
Spring Canola ◽  
Yield Penalty

Dual-purpose canola (Brassica napus) describes the use of a canola crop for grazed winter forage before seed production, a practice that has only recently been developed in southern Australia. Long-season winter canola has been grazed without yield penalty in higher rainfall zones of Australia (>650 mm) and the USA, but the potential areas are small. The feasibility to graze spring canola varieties across wider areas of the medium-rainfall (450–650 mm), mixed-farming zone in Australia is therefore of interest. We conducted a series of six field experiments involving a range of canola cultivars and grazing management and agronomy systems from 2007 to 2009 at Young in southern New South Wales, Australia, to determine the feasibility of and refine the principles for grazing dual-purpose spring canola without significant yield penalty. Mid-season, Australian spring canola cultivars including conventional and hybrid varieties representing a range of herbicide tolerance (triazine-tolerant, Clearfield®, and Roundup Ready®) were sown from 16 April to 12 May and grazed with sheep at a range of growth stages from early vegetative (June) to mid-flowering (September). In general, early-sown crops (sown mid-April) provided significant grazing (~800 dry sheep equivalent grazing days/ha) in winter before bud elongation, and recovered with no impact on grain yield or oil content. As previously reported, yield was significantly reduced (by up to 1 t/ha) when grazing occurred after buds had elongated (late July), due to the delayed flowering associated with bud removal by sheep and insufficient time for biomass and yield recovery. However, yield was also reduced in crops grazed before bud elongation if insufficient residual biomass remained (<1.0 t/ha for late July lock-up) to facilitate crop recovery even when there was little delay in crop development. We suggest that refinements to the existing ‘phenology-based’ grazing recommendations would assist to avoid yield loss in grazed spring varieties, and propose three grazing stages (safe, sensitive, and unsafe) that integrate the impacts of time, crop growth stage, residual biomass, and seasonal conditions to avoid yield loss under different circumstances. Such refinements to reduce the likelihood of grazing-induced yield loss would provide more confidence for mixed farmers to maximise the benefits from dual-purpose canola in different environments. Based on the outcomes of these experiments, dual-purpose spring canola is likely to have significant potential for wider application in other mixed farming zones, with similar region-specific refinements based on the principles reported here.

scholarly journals Evaluation of Sesame Yield and Yield Component under Different NPS Fertilizer Rates in Western Tigray, Ethiopia

2020 ◽  
pp. 1-7
Author(s):  
Teame Shimgabr ◽  
Negasi Gebereslasie ◽  
Haile Alene ◽  
Welesenbet Haftu ◽  
Nebyu Tsegay
Keyword(s):  
Grain Yield ◽  
Seed Yield ◽  
Field Experiments ◽  
Growth Yield ◽  
Yield Component ◽  
Yield Attributes ◽  
Significant Difference ◽  
Fertilizer Rates ◽  
Different Levels ◽  
Number Of Branches

Field experiments were conducted in three sites of Western Tigray, Ethiopia. The experiments aimed at identifying optimum the rate of the newly introduced NPS fertilizer impact with different levels on growth, yield attributes, yield and economics of sesame in vertisols of Western Tigray at the Humera station, Banat and Kebabo Kafta Humera and Tsegede Wereda’s. The treatments consisted of six levels of NPS 0, 50, 100, 150, 200 and 250 kg ha-1 and one blanket recommendation N and P was applied. The experiment was laid out in an RCBD with three replications. Yield of Sesame and yield related components showed significant difference (p < 0.001) compared to control. Results showed that number of branches plant-1, length of pod bearing zone (cm), plant height (cm), number of capsules plant-1, seeds capsule-1 and seed yield was significant differences at (P< 0.001) Grain yield increases from 444.8 kg ha-1 to 671.9 kg ha-1 as NPS and 444.8 kg ha-1 to 628 kg ha-1 as NP increases from 0 (control) to 100 kg ha-1 NPS and 41 kg N and 46 kg P205 ha-1 respectively. But NPS was not significant with blanket recommendation of N and P (41 kg N and 46 kg P205 ha-1), therefore no need to replace the NP by NPS fertilizer in the study area.

scholarly journals CANOLA YIELD AND PROFITABILITY AS INFLUENCED BY VOLUNTEER WHEAT INFESTATIONS

1989 ◽  
Vol 69 (4) ◽  
pp. 1235-1244 ◽  
Author(s):  
J. T. O’DONOVAN ◽  
K. J. KIRKLAND ◽  
A. K. SHARMA
Keyword(s):  
Triticum Aestivum ◽  
Multiple Regression ◽  
Seed Yield ◽  
Field Experiments ◽  
Yield Loss ◽  
Brassica Campestris ◽  
Triticum Aestivum L ◽  
Economic Threshold ◽  
Rectangular Hyperbola

The effects of different densities of volunteer wheat (Triticum aestivum L. ’Neepawa’) on the yield of canola (Brassica campestris L. ’Tobin’ and B. napus L. ’Westar’), and the seed yield of the volunteer wheat were determined in field experiments conducted at Vegreville, Alberta and Scott, Saskatchewan. Hyperbolic models provided a good fit to the data in most instances and indicated that volunteer wheat can severely reduce canola yield. A model pooled over locations and years indicated that volunteer wheat populations as low as one plant m−2 reduced canola yield by approximately 1%. Yield loss predictions from the models were used to determine the economics of volunteer wheat control with herbicides. In some cases, revenue losses due to reduced canola yield could be alleviated when the value of the volunteer wheat was considered.Key words: Volunteer wheat, canola, rectangular hyperbola, multiple regression, economic threshold, volunteer cereals

Response of promising - rainy summer season greengram (Vigna radiata (L) genotypes to phosphorus fertilization

2017 ◽  
Author(s):  
R. L. Rajput ◽  
Beerbal Singh Rajput
Keyword(s):  
Seed Yield ◽  
Vigna Radiata ◽  
Harvest Index ◽  
Field Experiments ◽  
Growth Yield ◽  
Summer Season ◽  
Phosphorus Fertilization ◽  
College Of Agriculture ◽  
Pooled Data ◽  
Phosphorus Levels

Field experiments were conducted at Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya College of Agriculture, Gwalior during two kharif and summer seasons of 2009 and 2010 to study the effect of phosphorus levels and genotype on growth, yield and economics of greengram. Two years pooled results showed that the application of 60 Kg P2O5 /ha registered significantly higher yield (11.52 and 8.41 q/h), yield attributing characters, harvest index (33.61 and 27.86) net retreturn and B:C ratio (3.0 and 2.27) as compared to 30 kg P2O5 /ha during both kharif and summer seasons respectively. Among the genotypes on the basis of pooled data, genotype TM 99-50 gave significantly higher seed yield (13 and 9 q/ha kharif and Summer) yield attributing characters harvest index (37.06 and 30.96%) net return (Rs. 33320 and 19820 /ha) and B:C ratio (3.73 and 2.69) as compare to other genotype during both kharif and summer seasons. The second best genotype was TM 98-50 to augment these parameters. The lowest parameters were recorded in case of HUM-1 in kharif and TRAM-1 in summer season.

scholarly journals Different Rates of Chicken Manure and NPK 15-15-15 Enhanced Performance of Sunflower (Helianthus annuus L.) on Ferruginous Soil

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
V. I. Abumere ◽  
O. A. Dada ◽  
A. G. Adebayo ◽  
F. R. Kutu ◽  
A. O. Togun
Keyword(s):  
Nutrient Uptake ◽  
Seed Yield ◽  
Dry Matter ◽  
Field Experiments ◽  
Block Design ◽  
Oil Quality ◽  
Chemical Properties ◽  
Growth Yield ◽  
Chicken Manure ◽  
Npk Fertilizers

Utilization of adequate fertilizer rate enhances soil physical and chemical properties, minimizes soil nutrient imbalance, and promotes better crop growth and development. The study investigated the influence of varying rates of chicken manure and NPK fertilizers as it affected growth, nutrient uptake, seed yield, and oil yield of sunflower on nutrient-limiting soil. Field experiments were carried out during 2014 and 2015 planting seasons for both main and residual studies. There were eight treatments comprising four rates of chicken manure (5, 10, 15, and 20 t·ha−1), three rates of NPK (30, 60, and 90 kg·N·ha−1), and control. The experiment was laid out in a randomized complete block design with three replicates. Growth, yield, dry matter and proximate, nutrient uptake concentration, and oil content were determined following standard procedures. Data were analyzed using ANOVA, and means were compared with the Duncan multiple range test (DMRT) at p≤0.05. Performance of sunflower was superior on the field fertilized with 10 t·ha−1 chicken manure which was comparable to 90 kg·N·ha−1 NPK fertilizer. Sunflower seed yield and oil quality were superior in plots supplied with 10 t·ha−1 chicken manure which was comparable to 60 kg·N·ha−1 NPK. Growth, yield, dry matter, and proximate content were least in the unfertilized plots.

scholarly journals Warm and Wet Autumns Favour Yield Losses of Oilseed Rape Caused by Phoma Stem Canker

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1171
Author(s):  
Andrzej Brachaczek ◽  
Joanna Kaczmarek ◽  
Malgorzata Jedryczka
Keyword(s):  
Oilseed Rape ◽  
Seed Yield ◽  
Field Experiments ◽  
Yield Loss ◽  
Stem Canker ◽  
Fungal Species ◽  
Growth Stages ◽  
Brassica Napus L ◽  
Phoma Stem Canker ◽  
Plant Growth Stages

Winter oilseed rape (Brassica napus L.) is the main source of domestic oil in central and northern Europe, bringing profits to farmers, but the plants are often damaged by stem canker, caused by two fungal species belonging to the genus Leptosphaeria. Due to environmental concerns, the benefits of fungicide applications must outweigh disadvantages. The aim of this work was to determine the effect of stem canker on seed yield and its quality and find out the best timing of fungicide application. The multi-year field experiments were done at two sites in south-west Poland, where the disease is regarded as a serious problem. The fungicide treatments with the azole-containing preparation followed the same scheme each year; a single application was made at one-week intervals, starting in late September through mid-November for a total of eight treatments. Seed yield, oil and protein content, mass of thousand seeds as well as indole-and alkenyl-glucosinolate contents in seeds were statistically unrelated with the incidence and severity of phoma leaf spotting and stem canker symptoms. The significant decrease of the seed yield was observed in three (site × year combinations) of eight, in which phoma leaf spotting and stem canker were severe. Yield loss was noted only in years with warm and wet autumns, when cumulative mean temperatures between BBCH14 and BBCH19 plant growth stages exceeded 60 °C and precipitation in this period exceeded 110 mm of rain. Under these conditions, fungicide treatments were highly effective when they were done between BBCH15–BBC16 growth stages (5–6 true leaves).

scholarly journals Growth, nodulation, and yield of soybean and associated weeds as affected by weed management

2008 ◽  
Vol 26 (4) ◽  
pp. 855-863 ◽  
Author(s):  
M.T. Abdelhamid ◽  
I.M. El-Metwally
Keyword(s):  
Seed Yield ◽  
Weed Management ◽  
Field Experiments ◽  
Growth Yield ◽  
Dry Weight ◽  
The Other ◽  
Research Centre ◽  
Yield Attributes ◽  
Soybean Plants ◽  
Total Dry Weight

Two field experiments were conducted at the experimental farm of the National Research Centre at Shalakan, Kalubia Governorate, Egypt, during 2006 and 2007 seasons, to study the effect of three pre-emergence herbicides, prometryn [at the rate of 0.75, 1.5 and 2.25 kg ha-1], oxadiargyl [at the rate of 240, 480 and 720 g ha-1] and butralin [at the rate of 1.20, 2.40 and 3.36 kg ha-1], two hand hoeing treatments and a nonweeded check, on weed infestation, nodulation, growth, yield and yield attributes of soybean plants. Two hand hoeing treatments resulted in the highest weed depression expressed as the lowest fresh and dry weights of broadleaved, grassy and total weeds. The reduction percentage in weed dry matter compared to the nonweeded treatment was 98.3, 92.64 and 96.9% in broadleaved, grassy and total weeds, respectively. Application of the three herbicides at higher or recommended doses significantly reduced fresh and dry weight of the weeds compared to the nonweeded treatment. The results indicated that all the three herbicides at rates higher than the recommended markedly decreased the number, fresh and dry weight of nodules as well as root, shoot and total dry weight plant-1, while application of two hand hoeing treatments significantly increased these traits. Two hand hoeing treatments and pre-emergence herbicides at the recommended rates markedly increased soybean yield and its attributes. Two hand hoeing treatments gave the highest values of number of pods per plant-1, weight of pods per plant-1 and number of seeds per plant-1 by 140.7, 150.0 and 59.8%, respectively, compared to the nonweeded treatment. On the other hand, oxadiargyl at the recommended rate (480 g ha-1) was the best treatment for promoting seed yield (g plant-1), seed yield (kg ha-1) and biological yield (g plant-1) compared to the nonweeded treatment by 87.3, 85.0 and 88.2%, respectively. Prometryn at the rate of 1.50 kg ha-1, followed by two hand hoeing treatments, produced the highest shoot and seed protein percentage as well as seed oil percentage, compared to the other weed control treatments.

Effect of weed control treatments and hill-spacing on soybean and associated weeds

2004 ◽  
Vol 52 (1) ◽  
pp. 81-93 ◽  
Author(s):  
A. H. Galal
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Significant Influence ◽  
Field Experiments ◽  
Growth Yield ◽  
Dry Weight ◽  
Plant Weight ◽  
Plant Seed ◽  
Yield And Quality ◽  
Seed Index

Two field experiments were carried out at the Experimental Farm of Assiut University, during the 2000 and 2001 summer seasons, to study the effect of three hill spacings (5, 10 and 15 cm) and six weed control treatments on the associated weeds, plant growth, yield and quality of soybean. The weed control treatments were carried out with trifluralin, linuron, pendimethalin, bentazon and hand hoeing, with an unweeded treatment as the control. All the weed control treatments exerted a significant influence on the dry weight of weeds. Hand hoeing and pendimethalin treatment significantly decreased the dry weight of dicot and monocot weeds as compared to the unweeded treatment. Hand hoeing gave the lowest value of the dry weight of total weeds and the highest efficiency percentage. In general, the significantly lowest dry weight of total weeds was recorded for densely sown soybeans. The weed control treatments exerted a significant influence on all the characters under study (plant height, weight of pods and seeds/plant, number of plants at harvest, seed yield/ha). The height of the first pod was lowered by hand hoeing and the application of pendimethalin increased the number of pods/plant, while the highest values of number of branches/plant, seed index, oil and protein contents were obtained after linuron application. wider spacing produced higher values for the number of pods and branches/plant, weight of pods and seeds/plant, seed index and protein content and lowered the height of the first pod as compared to plants sown at closer spacing. The latter produced the highest values of number of plants/ha, seed yield/ha and oil content at harvest. The first order interaction exerted a significant influence on all the characters studied, the highest seed yield/ha (2728.6 kg) being obtained from sowing plants at 5 cm combined with hand hoeing.

scholarly journals Performance of Frogeye Leaf Spot-Resistant and -Susceptible Near-Isolines of Soybean

Plant Disease ◽  
1998 ◽  
Vol 82 (9) ◽  
pp. 1017-1021 ◽  
Author(s):  
M. A. R. Mian ◽  
H. R. Boerma ◽  
D. V. Phillips ◽  
M. M. Kenty ◽  
G. Shannon ◽  
...  
Keyword(s):  
South Carolina ◽  
Seed Yield ◽  
Leaf Spot ◽  
Field Experiments ◽  
Yield Loss ◽  
Growing Season ◽  
Stage Of Development ◽  
Frogeye Leaf Spot ◽  
Progress Curve ◽  
Glycine Max L

Frogeye leaf spot (FLS) caused by Cercospora sojina Hara is a disease of soybean (Glycine max (L.) Merr.) that causes significant seed yield losses in warm, humid environments of southeastern United States. The Rcs3 gene in soybean has been reported to condition resistance to all known races of C. sojina. The objectives of this study were to determine the effectiveness of Rcs3 in limiting seed yield loss due to FLS and to compare the seed yield of the resistant and susceptible near-isolines (NILs) in the absence of significant FLS disease. Four pairs of NILs—Colquitt/Colquitt-Rcs3, Gordon/Gordon-Rcs3, Thomas/Thomas-Rcs3, and Wright/Wright-Rcs 3—were evaluated in 23 field experiments in Alabama, Florida, Georgia, Louisiana, Mississippi, and South Carolina during 1992 to 1994. The amount of damage to susceptible soybean caused by FLS was dependent on the specific environment. All four of the Rcs3 NILs were resistant to the prevalent races of FLS in all environments. In the absence of significant FLS disease, each of the Rcs3 NILs was at least equal to the respective susceptible line in its seed yield. In the presence of FLS infestation, the susceptible lines suffered significant seed yield loss (up to 31%) compared to their Rcs3 NILs. The effect of FLS on seed yield was dependent on cumulative disease severity over the growing season. Thus, the area under disease progress curve was more useful than percent of leaf area infected at the end of the growing season (R7 stage of development) in explaining the seed yield loss due to FLS.

scholarly journals THE RESPONSE OF GROWTH, YIELD AND QUALITY OF TWO SOYBEAN VARIETIES GLYCINE MAX (L.) TO SOWING DEPTH

2020 ◽  
Vol 21 (supplement 1) ◽  
Author(s):  
Asaad Ramzi Salman Al-Tayar ◽  
Muthana Abdulbasit Ali ◽  
Ayad Talat Shaker
Keyword(s):  
Leaf Area ◽  
Seed Yield ◽  
Field Experiments ◽  
Block Design ◽  
Growth Yield ◽  
Sowing Depth ◽  
Oil Percentage ◽  
Glycine Max L ◽  
Emergence Percentage ◽  
Field Emergence

Tow field experiments were conducted at Nineveh Governorate at two locations: Baashiqa/village Omer qapchi and Al-Rashidia during the summer growing season 2019, to study the response of two soybean varieties (Lee74 and Taqa) to sowing depth (3 and 7 cm). The experiments were carried out in Randomized Complete Block Design (R.C.B.D) with three replications. The results were as following: Variety Taqa was significantly superior in field emergence Percentage, leaf area, no. of pods.plant-1, wt. of 1000 seeds, seed yield, and protein percentage for both locations. Sowing depth with 3cm increased significantly the following characters i.e.: field emergence Percentage, leaf area, and no. of pods.plant-1, wt. of 1000 seeds, seed yield, and oil percentage for both locations. - Overlap between Taqa variety and sowing depth (3cm) led to significantly superior in growth, yield, and its components, i.e. field emergence Percentage, leaf area, no. of pods.plant-1, wt. of 1000 seeds, seed yield and oil percentage for both location.

Sign in / Sign up

Export Citation Format

Share Document