ROW WIDTH AND SEEDING RATE IN RELATION TO SEED PRODUCTION IN TIMOTHY, Phleum pratense L.

1961 ◽  
Vol 41 (3) ◽  
pp. 549-558
Author(s):  
R. S. Fulkerson ◽  
W. E. Tossell
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Seed Weight ◽  
Seed Quality ◽  
Phleum Pratense ◽  
Control Measures ◽  
Seeding Rate ◽  
Weight Percentage ◽  
Row Width ◽  
Spike Number

Row widths of 14, 21, 28 and 35 inches gave similar seed yields, out-yielding the 7-inch row width by 109 pounds per acre over a 4-year period. Row width had only minor effects on seed quality measured by seed weight, percentage of seed that established normal seedlings in soil and early seedling height. Rows 21 inches and wider required weed control measures. Based on seed yield, seed quality and weed control, the 14-inch row spacing was superior.Seeding rates of 2.5, 5, 7.5 and 10 pounds per acre had no important effects on seed yield or seed quality. Of the three yield components studied – spike number, spike length and seed weight – only the last two were correlated with seed yield. Spike number was not related to seed yield in any of the 3 years in which it was studied but may have been important in determining differences among years in seed yield. None of the indices of seed quality was related closely to seed yield.

THE EFFECTS OF SEEDING RATE AND ROW WIDTH IN RELATION TO SEED PRODUCTION IN ORCHARD GRASS, DACTYLIS GLOMERATA L.

1959 ◽  
Vol 39 (3) ◽  
pp. 355-363 ◽  
Author(s):  
R. S. Fulkerson
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Seed Quality ◽  
Negative Relationship ◽  
Seeding Rate ◽  
Seedling Vigour ◽  
The Third ◽  
Row Width ◽  
Rate Interaction ◽  
Number Of Seeds

The effects of six seeding rates and five row spacings on seed yield, seed quality and the yield components—number of fertile culms per square foot, number of seeds per culm and seed weight were studied in orchard grass.Row width had a marked effect on seed yield each year. Rate of seeding affected seed yield to a lesser extent and a row width × seeding rate interaction did occur. Seeding rates and row width caused small relatively unimportant differences in seedling establishment and early seedling vigour only in the third harvest year. Considering seed yield, seed quality and the ease of weed control, the best treatment combination appeared to be a seeding rate in the area of [Formula: see text] in 14-in. rows for stands to produce for 2 or 3 years.Seed yield was positively and closely correlated with the number of fertile culms in the first 2 crop years but a negative relationship was found in the third crop year. Seed weight was negatively correlated with seed yield. The number of seeds per panicle was closely associated with yield in the third crop year and negatively correlated with seed weight and culm numbers.

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

1992 ◽  
Vol 72 (3) ◽  
pp. 635-641 ◽  
Author(s):  
A. E. Van Deynze ◽  
P. B. E. McVetty ◽  
R. Scarth ◽  
S. R. Rimmer
Keyword(s):  
Protein Content ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Oil Content ◽  
Seed Quality ◽  
Seeding Rate ◽  
Seed Formation ◽  
Matter Production

To compare the effects of varying seeding rate on the agronomic performance, phenology and seed quality of hybrid and conventional summer rape cultivars, four hybrid and two conventional summer rape cultivars were seeded at 1.5, 3.0, 4.5, 6.0 and 9.0 kg ha−1 at two locations for 3 yr. The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars. The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars. The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars, (i.e., equal or earlier to flowering and maturity than Regent). The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars. In spite of these differences, there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate. Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate. Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate. Varying seeding rate had no effect on seed formation period, the sum of oil and protein content, or chlorophyll content. A seeding rate of 6 kg ha−1 maximized seed yield for both hybrid and conventional summer rape cultivars.Key words: Brassica napus, canola, seed quality, agronomy, phenology

Dry bean (Phaseolus vulgaris) tolerance to imazethapyr

1996 ◽  
Vol 76 (4) ◽  
pp. 915-919 ◽  
Author(s):  
R. E. Blackshaw ◽  
G. Saindon
Keyword(s):  
Phaseolus Vulgaris ◽  
Weed Control ◽  
Seed Yield ◽  
Weed Management ◽  
Seed Weight ◽  
Growth And Yield ◽  
Yield Response ◽  
Dry Beans ◽  
Dry Bean ◽  
Bean Yield

A field study was conducted during 3 yr to determine the growth and yield response of Pinto, Pink Red and Great Northern dry beans to various doses of imazethapyr. Imazethapyr was applied postemergence at 0, 25, 50 75 100, 150, and 200 g ha−1 to each class of dry bean. Results indicated that these four classes of dry beans responded similarly to imazethapyr. Dry bean injury increased and yields were reduced as dose of imazethapyr increased. At the proposed use dose of 50 g ha−1, imazethapyr reduced yield by 5 to 6%. Imazethapyr at 100 g ha−1 reduced dry bean yield by 10 to 12% and delayed maturity by 3 to 4 d. Benefits of superior weed control attained with imazethapyr should be weighed against potential crop injury when growers consider using imazethapyr in their dry bean weed management programs. Key words: Herbicide injury, maturity, seed yield, seed weight

scholarly journals Chemical weed management in Brassica rapa var. yellow sarson

2016 ◽  
Vol 8 (2) ◽  
pp. 663-667
Author(s):  
S. K. Das
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Weed Management ◽  
Field Experiments ◽  
Control Measures ◽  
Research Station ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Hand Weeding ◽  
Level Of Significance

Field experiments were conducted for three years at Pulses and Oilseeds Research Station, Berhampore, Murshidabad, West Bengal, India during rabi 2008, 2009 and 2010 to develop an efficient chemical weed management practice with newer herbicidal molecules in yellow sarson. The experiment was laid out in a randomized block design with three replications having eleven treatments. Experimental results revealed that highest seed yield (1456 kg ha-1) was recorded under the treatment twice hand weeding and lowest with weedy check (910 kg ha-1). Twice hand weeding recorded 60% higher seed yield over weedy check. Application of chemical herbicides significantly improved the seed yield over W0 at 5% level of significance.. Among the chemical weed control measures, application of Pendimathalin @ 1 kg a.i./ha (PE) recorded highest seed yield (1320 kg ha-1) of yellow sarson, which was found at par with application of Pendimathalin @ 1.5 kg a.i./ha (PE), Fluchloralin @ 1.5 kg a.i/ha (PPI) and Clodinafop @ 0.06 kg a.i./ha ( 25-30 DAS). Chemical weed management practices increased the seed yield of yellow sarson by 25.3 to 45.1% over weedy check. Highest weed control efficiency (86.4%) was recorded with hand weeding twice. Significant reduction in the total weed density and total weed dry weight were found with the application of chemical herbicides at 5% level of significance. Among the chemical herbicides Pendimathalin @ 1 kg a.i./ha (PE) recorded highest weed control efficiency (81.7%). Chemical weed control measures increased the total microbial population by 26.5 to 89.4% over weedy check and 6.6 to 59.6% over twice hand weeding and thus proved to be environmentally safe and economic for managing weeds in yellow sarson.

Variable paths to seed production within the Kangaroo Valley cultivar of Lolium perenne

1991 ◽  
Vol 42 (1) ◽  
pp. 151 ◽  
Author(s):  
SG Shah ◽  
CJ Pearson ◽  
AC Kirby
Keyword(s):  
Seed Production ◽  
Lolium Perenne ◽  
Seed Yield ◽  
Low Temperatures ◽  
Seed Weight ◽  
Floral Development ◽  
Dry Weight ◽  
Daily Rate ◽  
Spike Number ◽  
The Mean

Components of seed yield were measured in an erect, early-flowering biotype and a prostrate, late-flowering biotype of Lolium perenne cv. Kangaroo Valley at temperatures from 15/10 to 24/19�C (12/12 h day/night). We aimed to determine if each biotype had distinctive components of seed yield, and if these varied according to temperature. The two biotypes had distinctive paths to seed yield. Seed yield per plant in an erect biotype depended more on seed weight per spike and less on spike number than in a prostrate biotype. The distinctive paths to seed yield, and relative stability in paths across temperatures, indicated that it was possible to select genotypes from within the Kangaroo Valley cultivar which had particular correlations among components of yield. Floral development was accelerated, but seed yield per plant and most of its components were reduced, at high temperature; only the mean daily rate of dry weight accumulation by individual seeds was the same at all temperatures. At any temperature, seed weight per spike declined almost linearly with lateness of spike emergence within a plant: spikes which emerged within 21 days of the earliest spike contributed 80% of the seed yield per plant. We conclude that biotypes can be selected within the Kangaroo Valley cultivar to have distinctive components of seed yield and, based on the two biotypes we studied, commercial seed production should be based at a location having relatively low temperatures.

EFFECT OF SEEDING RATE ON PLANT AND SEED CHARACTERISTICS OF NEW FLAX CULTIVARS

1989 ◽  
Vol 69 (3) ◽  
pp. 791-795 ◽  
Author(s):  
G. H. GUBBELS ◽  
E. O. KENASCHUK
Keyword(s):  
Iodine Number ◽  
Plant Height ◽  
Seed Yield ◽  
Linum Usitatissimum ◽  
Seed Weight ◽  
Oil Content ◽  
Seeding Rate ◽  
Linum Usitatissimum L ◽  
Volume Weight ◽  
Seed Characteristics

Five flax (Linum usitatissimum L.) cultivars, Dufferin, McGregor, Linott, NorLin and NorMan were grown in the field in 1985, 1986 and 1987 at seeding rates of 200, 400, 600 and 800 seeds m−2. Averaged over all cultivars and years, as seeding rate increased from 200 to 800 seeds m−2, maturity was hastened 2.1 d, seed weight decreased 0.16 g 1000−1 seeds, oil content decreased 0.6%, iodine number decreased 1.3 units and volume weight was not markedly changed. Lodging increased and basal branching decreased from 1.68 to 0.18 branches per plant as seeding rate increased. Plant height increased 0.6 cm from the 200 to the 400 seeds m−2 rate then decreased 1.8 cm from the 400 to the 800 seeds m−2 rate. Seed yield increased from 110 to 124 g m−2 as seeding rate increased from 200 to 600 seeds m−2, then decreased to 121 g m−2 at 800 seeds m−2. Although yields of the five cultivars varied somewhat in their response to seeding rate and year, most yielded near optimum at the 600 seeds m−2 seeding rate.Key words: Flax, Linum usitatissimum L., seeding rate, lodging

SEED YIELD RESPONSE OF THREE FORAGE GRASSES TO THINNING

1972 ◽  
Vol 52 (4) ◽  
pp. 613-618 ◽  
Author(s):  
R. S. FULKERSON
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Yield Response ◽  
Forage Grasses ◽  
Production Methods ◽  
Orchard Grass ◽  
Row Width ◽  
Weight Data

Orchard grass, timothy, and bromegrass were grown for seed production in 35.5- and 71.0-cm row widths, containing plants in a solid or in a 35.5-cm thinned row arrangement. Seed yield, head numbers, head length, seed per head, and seed weight data were collected for 3–5 crop years. Orchard grass produced its highest yield of seed from the 71.0-cm thinned rows. Yield differences were present for the first 3 years only. Yield components were affected to a larger extent by row width than by thinning. However, with timothy, row widths did not influence yield and components some years. The production methods affected the bromegrass seed crop in the 1st crop year but had no influence by the 3rd year. Although some relations were established between seed yield and the components with the species studied, none appeared to clarify the physiological relations involved.

Crop density and seed production of tall fescue (Festuca arundinacea Schreber). 2. Reproductive components and seed characteristics

1999 ◽  
Vol 79 (4) ◽  
pp. 543-549 ◽  
Author(s):  
N. A. Fairey ◽  
L. P. Lefkovitch
Keyword(s):  
Seed Yield ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Yield Components ◽  
Seed Weight ◽  
Seed Quality ◽  
Plant Density ◽  
Initial Density ◽  
Row Spacing ◽  
Seed Characteristics

The population density and spatial arrangement of plants may influence the productive life and performance characteristics of a perennial grass-seed crop. A study was conducted to determine the effects of the initial density (1.6, 3.1, 6.3, 12.5, 25, 50 and 100 plants m−2) and row spacing (20, 40, and 80 cm) of plants on reproductive yield components and seed characteristics of tall fescue (Festuca arundinacea Schreber), over 3 consecutive production years (1991–1993) in the Peace region of Canada. The weight proportion of cleaned-to-uncleaned seed was 85–86% for the three lowest plant densities and then decreased, as density increased, to 82% at 12.5 plants m−2 and 66% at 100 plants m−2. The 1000-seed weight decreased as density increased and ranged from 1.68 to 2.22 g (i.e., 595 000 to 450 000 seeds kg−1). The specific seed weight ranged from 18 to 31 kg hL−1; it differed among years, but the effect of plant density was inconsistent. The germination capacity of the seed was unaffected by plant density, but differed among years; it averaged 87%, 88% and 59% in 1991, 1992 and 1993, respectively. The seed yield/plant, the number of panicles/plant, and the number of seeds/plant decreased exponentially as plant density increased. The number of clean seeds/panicle decreased, as plant density increased, in the first year but was less affected subsequently, particularly with the 20-cm row spacing. The seed yield was correlated closely with the number of panicles m−2 (r = 0.659***). An initial density no greater than 25 plants m−2 in rows spaced 20–40 cm apart enhanced seed quality by producing a greater proportion of clean seed which had a higher 1000-seed weight. Such a plant density, however, is at the low end of the optimum range for maximizing seed yield per unit land area. Key words: Tall fescue, Festuca arundinacea Schreber, population density, plant and row spacing, yield components, seed quality

EFFECT OF SEEDING RATE ON HEIGHT, YIELD AND QUALITY OF LARGE-SEEDED AND SEMI-DWARF BUCKWHEAT GENOTYPES

1986 ◽  
Vol 66 (1) ◽  
pp. 61-66 ◽  
Author(s):  
G. H. GUBBELS ◽  
C. G. CAMPBELL
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Seed Weight ◽  
Fagopyrum Esculentum ◽  
Seed Density ◽  
Seeding Rate ◽  
Consistent Effect ◽  
Yield And Quality ◽  
Fagopyrum Esculentum Moench

Two large-seeded buckwheat (Fagopyrum esculentum Moench.) cultivars, Mancan and Manor, and semi-dwarf lines, were grown at Morden and Portage la Prairie in the years 1979–1982 at seeding rates of 15, 30, 45 and 60 kg/ha. There was no consistent effect of seeding rate on plant height, seed weight (g/1000 seeds) or seed density. In six of the eight location-years there was no interaction of genotype × seeding rate for seed yield, indicating that, generally, the cultivars and lines reacted similarly to differences in seeding rate. It was concluded that a seeding rate of from 30 to 45 kg/ha would ensure optimum yield in most years.Key words: Buckwheat, Fagopyrum esculentum Moench., seeding rates

EFFECT OF SEEDING RATE AND HARVEST METHOD ON AGRONOMIC CHARACTERISTICS OF WHITE BEAN

1988 ◽  
Vol 68 (3) ◽  
pp. 801-804 ◽  
Author(s):  
GARY ABLETT
Keyword(s):  
Phaseolus Vulgaris ◽  
Seed Size ◽  
Seed Yield ◽  
Seed Quality ◽  
Phaseolus Vulgaris L ◽  
Seeding Rate ◽  
Agronomic Characteristics ◽  
White Bean ◽  
Narrow Row ◽  
Harvest Method

Kentwood white bean (Phaseolus vulgaris L.) was sown at three seeding rates in narrow rows for 4 yr With direct-harvesting, yields increased as seeding rates increased up to 64 seeds m−2, whereas, with hand-harvesting seed yield was not affected. Seed quality was superior in the direct-harvested plots; however, yield was lower. Seed size was not affected.Key words: White bean, narrow-row, yield, seed quality

Sign in / Sign up

Export Citation Format

Share Document