QUALITY, YIELD AND WEIGHT PER SEED OF GREEN FIELD PEAS AS AFFECTED BY SOWING AND HARVEST DATES

1977 ◽  
Vol 57 (4) ◽  
pp. 1029-1032 ◽  
Author(s):  
G. H. GUBBELS
Keyword(s):  
Pisum Sativum ◽  
Sowing Date ◽  
Field Pea ◽  
Green Color ◽  
Protein Percentage ◽  
Pisum Sativum L ◽  
Harvest Dates ◽  
Field Peas ◽  
Significant Difference ◽  
Cooking Yield

The green field pea (Pisum sativum L.) cv. Delwiche Scotch Green was sown at two dates and harvested at five dates in the field in 1971–1973 to determine the effect on quality, yield and weight per seed. The green color deteriorated with delay in harvesting. Rate of color loss varied from year to year, probably due to rainfall patterns. Differences in protein percentage due to sowing date varied from year to year, resulting in no significant difference over the 3-yr period. Viscosity of peas after cooking, yield and weight per seed were higher in the early than in the later sowing.

QUALITY, YIELD, AND SEED WEIGHT OF GREEN FIELD PEAS UNDER CONDITIONS OF APPLIED SHADE

1981 ◽  
Vol 61 (2) ◽  
pp. 213-217 ◽  
Author(s):  
G. H. GUBBELS
Keyword(s):  
Light Intensity ◽  
Pisum Sativum ◽  
Protein Content ◽  
Seed Weight ◽  
Field Studies ◽  
Field Pea ◽  
Green Color ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Very High

Field studies were conducted in 1973 and 1974 to evaluate the effects of light intensity on the quality and yield of the green field pea (Pisum sativum L.) ’Triumph’. The treatments included a control with no shading (80 klx) and shading with one (31 klx) or two (9 klx) layers of screen material for a 3-wk period before maturity. Shading resulted in a significant decrease in seed weight and yield and a significant increase in protein content of the seed. The effect of shading on viscosity of the cooked samples was quadratic, implying that viscosity only decreased at very high levels of shading. Shading also tended to reduce loss of green color in the seed cotyledons.

Proximate and mineral composition of field peas

1997 ◽  
Vol 77 (1) ◽  
pp. 101-103 ◽  
Author(s):  
T. D. Warkentin ◽  
A. G. Sloan ◽  
S. T. Ali-Khan
Keyword(s):  
Pisum Sativum ◽  
Key Words ◽  
Mineral Composition ◽  
Seed Yield ◽  
Total Protein ◽  
Field Pea ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Pea Seeds ◽  
Proximate And Mineral Composition

Field pea seeds from 10 cultivars grown at two locations in Manitoba in 1986 and 1987 were analyzed for proximate and mineral profiles. Cultivars differed significantly in their level of total protein, crude fat, ADF, and all minerals tested. However, differences were not extremely large and were comparable to European reports. Location-year also had a significant effect on the levels of total protein, ADF, and all minerals tested. In most cases, the warmest location-year produced relatively higher levels of minerals, ash, and total protein, and lower seed yield than the coolest location-year. Key words: Field pea, Pisum sativum L., mineral

SCREENING GREEN FIELD PEA GENOTYPES FOR RESISTANCE TO COLOR LOSS

1990 ◽  
Vol 70 (1) ◽  
pp. 45-49 ◽  
Author(s):  
G. H. GUBBELS ◽  
S. T. ALI-KHAN
Keyword(s):  
Pisum Sativum ◽  
Cooking Quality ◽  
Field Pea ◽  
Strongly Correlated ◽  
Green Color ◽  
Hard Seed ◽  
Good Evaluation ◽  
Pisum Sativum L ◽  
Before And After ◽  
Green Pea

Green field pea (Pisum sativum L.) genotypes were grown in the field and harvested before and after exposure to moist conditions. The seeds were evaluated for percent bleaching and intensity of green color. Samples from the first harvest were placed on moist paper in petri dishes for later recording of percent hard seeds and color. Percentage of bleached seeds and color at last harvest gave a good evaluation of resistance to color loss of the genotypes. Percentage of hard seed was strongly correlated with percentage of bleached seeds (negative) and color at last harvest (positive), and would provide the basis of a screening technique. However, non-soaking on moist paper may be associated with cooking quality, in which case the method would be of value in selecting lines for the split green pea market, but not for the whole green pea market.Key words: Pea (green field), Pisum sativum L., cotyledon color, seed bleaching

Effect of sowing date on the severity of ascochyta blight in field peas (Pisum sativum L.) grown in the Wimmera region of Victoria

2000 ◽  
Vol 40 (8) ◽  
pp. 1113 ◽  
Author(s):  
T. W. Bretag ◽  
P. J. Keane ◽  
T. V. Price
Keyword(s):  
Pisum Sativum ◽  
Field Experiments ◽  
Average Length ◽  
Ascochyta Blight ◽  
Sowing Date ◽  
Small Reduction ◽  
Average Percentage ◽  
Severity Of Disease ◽  
Pisum Sativum L ◽  
Field Peas

Field experiments were established at Horsham, in the Wimmera region ofVictoria, in 1987, 1988 and 1989 to compare the severity of ascochyta blightand grain yield of field peas sown in May, June and July. In each year, theseverity of ascochyta blight on all the pea cultivars studied was greatest onthe May-sown plots and least severe on the July-sown plots. The level of seedinfestation by ascochyta blight fungi was also highest in grain harvested fromthe plots sown earliest. In 1987, the average length of lesions girdling themain stem was 28.7 cm in the May-sown plots and 1.0 cm in the July-sown plots.In 1988, the average percentage of stem area affected by ascochyta ranged from 60.2% in the May-sown plots to 13.1% in the July-sown plots,while in 1989 the range was from 38.3% in the May-sown plots to5.8% in the July-sown plots. In 1988, delaying sowing until Julyresulted in a significant reduction in disease with only a small reduction inyield. However, in 1989 while July sowing reduced the severity of disease by 17%, compared to a June sowing, the later sowing also reduced grainyields by 40%.In a separate trial at Horsham in 1988, using cv. Buckley, disease progresswas most rapid on the April-sown plots and slowest on the August-sown plots.The final disease levels ranged from 100% of stem area affected (Aprilsowing) to 2% of stem area affected (August sowing). The yield lossescaused by the disease were greater the earlier the plots were sown.These studies suggest that the severity of disease in commercial crops may bereduced by delaying sowing until after mid-June, thus avoiding exposure ofyoung plants to high levels of primary inoculum.

Evaluation of coated seeds as a Rhizobium delivery system for field pea

2001 ◽  
Vol 81 (2) ◽  
pp. 247-253 ◽  
Author(s):  
W. A. Rice ◽  
G. W. Clayton ◽  
N. Z. Lupwayi ◽  
P. E. Olsen
Keyword(s):  
Nitrogen Fixation ◽  
Pisum Sativum ◽  
Field Experiments ◽  
Acid Soils ◽  
Field Pea ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Key Words Nitrogen Fixation ◽  
Ph Standard ◽  
Key Words Nitrogen

Greenhouse and field experiments were conducted with field peas (Pisum sativum, L.) in soils of pH 4.4 to 6.8 to determine the best rate of inoculation with rhizobium and to evaluate pre-inoculated (coated) seeds as an alternative to the traditional seed inoculation method of using sticking agents. Inoculation rates higher than 105 cells seed–1 were usually required for high nodulation, nitrogen fixation and grain yields. Therefore, Canadian standards, which require that 105 nodulating rhizobia be delivered per seed for large-seed legumes like peas, may need to be increased. Counts of rhizobia on coated seeds were about 3 log units lower than those on freshly inoculated seeds, but coated seeds significantly outperformed standard seed-inoculated seeds in nodulation and crop yield in acid soils (pH 4.4 and 4.7). However, field pea yields were too low to have commercial value at these low pH levels. In soils with higher pH, standard inoculation resulted in greater nodulation and yield, but the differences were not always significant. It is concluded that the use of coated seeds provides a yield advantage for field pea grown on acid soils, but liming would probably be a better option. Use of coated seeds on other soils will depend on the trade-off between the time and money saved in inoculation in order to seed early and a possible reduction in yield due to insufficient numbers of rhizobia being applied. Key words: Nitrogen fixation, nodulation, Pisum sativum, pre-inoculated seeds

Combined foliar selenium and zinc biofortification in field pea (Pisum sativum): accumulation and bioavailability in raw and cooked grains

2017 ◽  
Vol 68 (3) ◽  
pp. 265 ◽  
Author(s):  
Maria J. Poblaciones ◽  
Zed Rengel
Keyword(s):  
Pisum Sativum ◽  
Foliar Application ◽  
Daily Intake ◽  
Grain Filling ◽  
Field Pea ◽  
Combined Application ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Zn Concentration ◽  
Zn Bioavailability

Millions of people have an inadequate intake of selenium (Se) and zinc (Zn), and foliar biofortification may minimise these problems. To evaluate the efficacy of combined foliar Se and Zn fertilisation in field pea (Pisum sativum L.) grains, foliar Se and Zn applications were tested individually and in all combinations (0, 0.03% or 0.06% (w/v) NaSeO4, and 0, 0.25% or 0.5% (w/v) ZnSO4.7H2O) at early grain filling. Plant growth was not influenced by any of the treatments. There was a positive relationship between total Se or Zn concentration in raw or cooked grains and respective Se or Zn application dose. Grain Zn accumulation was positively influenced by the combined application of Se and Zn. Grain cooking caused a slight decrease in grain Se (by 7.4%) and Zn concentrations (by 19%); however, cooking enhanced Zn bioavailability. The consumption of 100 g of cooked, biofortified field peas would provide ~50% of recommended daily intake of Zn and 45% of Se. The present study successfully biofortified field peas with Se and Zn, with the combined foliar application of Se and Zn being the best option.

Natural enrichment of selenium in Saskatchewan field peas (Pisum sativum L.).

2010 ◽  
Vol 90 (4) ◽  
pp. 383-389 ◽  
Author(s):  
D. Thavarajah ◽  
T. Warkentin ◽  
A. Vandenberg
Keyword(s):  
Pisum Sativum ◽  
Key Words ◽  
Field Pea ◽  
Genotypic Differences ◽  
Recommended Daily Allowance ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Daily Allowance ◽  
Pea Seeds ◽  
Natural Enrichment

Pulses are important dietary sources of selenium (Se). Supplying needed Se through widely used foods such as pulses and cereals could increase dietary Se intake. We analyzed the total Se concentration of 17 field pea (Pisum sativum L.) cultivars grown at six locations for 2 yr in Saskatchewan. A significant effect of location was identified, with the highest Se concentration in pea seeds grown in the Saskatoon region and the lowest concentration in the Melfort region. The effect of crop year was not significant. Significant genotypic differences in total Se concentration among the 17 field pea cultivars were not observed in the combined analysis. Total Se concentrations over six locations × 2 yr ranged from 373 to 519 µg kg-1, corresponding to 68-94% of the recommended daily allowance (RDA) for adults based on a 100 g serving of dry field peas. Saskatchewan soils are derived from marine shale and are rich in Se, and pulses grown in Saskatchewan have the potential to provide an excellent natural source of this element. Key words: Selenium, field pea, biofortification

COOKING QUALITY, YIELD AND SEED WEIGHT OF FIELD PEAS AS AFFECTED BY IRRIGATION, NITROGEN, PHOSPHORUS AND HARVEST DATE

1982 ◽  
Vol 62 (4) ◽  
pp. 893-899 ◽  
Author(s):  
G. H. GUBBELS ◽  
S. T. ALI-KHAN ◽  
B. B. CHUBEY ◽  
M. STAUVERS
Keyword(s):  
Soil Moisture ◽  
Pisum Sativum ◽  
Field Study ◽  
Seed Weight ◽  
Cooking Quality ◽  
Field Pea ◽  
Harvest Date ◽  
Pisum Sativum L ◽  
Field Peas ◽  
Nitrogen Phosphorus

The yellow-seeded field pea (Pisum sativum L. ’Century’) was grown at two levels of soil moisture, two levels of N and P and harvested at four dates in a 3-yr field study to determine the effects of these factors on cooking quality as indicated by the color, weight and viscosity of the puree of cooked samples. Nitrogen lowered cooking quality where yields were not improved but maintained quality when yield was increased. Phosphorus applications improved yield and cooking quality, with highest improvements in yield coinciding with greatest improvements in quality. Harvesting too early or too late resulted in lower cooking quality.

PREHARVEST DESICCATION OF GREEN-SEEDED FIELD PEAS WITH DIQUAT

1982 ◽  
Vol 62 (3) ◽  
pp. 555-560 ◽  
Author(s):  
G. H. GUBBELS
Keyword(s):  
Pisum Sativum ◽  
Protein Content ◽  
Seed Size ◽  
Yield Loss ◽  
Cooking Quality ◽  
Quality Characteristics ◽  
Spray Application ◽  
Green Color ◽  
Pisum Sativum L ◽  
Field Peas

Diquat treatments were applied to green-seeded field peas (Pisum sativum L.) over a 5-yr period to determine the effect of applications at various stages of maturity on some agronomic and quality characteristics. The spray application effectively hastened drying of the plants, eliminating the need for windrowing. The rate of 0.28 kg a.i./ha was adequate. The earlier harvesting permitted by the treatments reduced loss of green color and germinability associated with weathering and reduced yield loss from shattering. Applications made as early as the 50% brown pod stage did not markedly affect yield, protein content, seed size, cooking quality or germinability. However, a later stage of spraying may be advisable under conditions of slow maturation.

TARA FIELD PEAS

1978 ◽  
Vol 58 (4) ◽  
pp. 1123-1124
Author(s):  
S. T. ALI-KHAN
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Field Pea ◽  
High Yield ◽  
Research Station ◽  
Pisum Sativum L ◽  
Field Peas

A yellow-seeded field pea (Pisum sativum L.) cultivar, Tara, developed at the Agriculture Canada Research Station, Morden, Manitoba was licensed in Canada in March 1978. The main features of Tara are high yield and resistance to powdery mildew.

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