scholarly journals Determination of seeding rate and inter row spacing on the yield of tef (Eragrostis tef Zucc. Trotter) in the dryland areas of Wag Lasta, North Eastern Amhara, Ethiopia

2019 ◽  
Vol 4 (1) ◽  
pp. 69-74
Author(s):  
A. Lakew ◽  
T. Berhanu
Keyword(s):  
Eragrostis Tef ◽  
Row Spacing ◽  
Seeding Rate ◽  
North Eastern

scholarly journals Individual and Combined Effects of Planting Date, Seeding Rate, Relative Maturity, and Row Spacing on Soybean Yield

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 605
Author(s):  
Peder K. Schmitz ◽  
Hans J. Kandel
Keyword(s):  
Seed Yield ◽  
Management Practices ◽  
Synergistic Effects ◽  
Canopy Cover ◽  
Planting Date ◽  
Row Spacing ◽  
Growth Stages ◽  
Seeding Rate ◽  
Yield Increase ◽  
Beginning Of Flowering

Planting date (PD), seeding rate (SR), relative maturity (RM) of cultivars, and row spacing (RS) are primary management factors affecting soybean (Glycine max (L.) Merr.) yield. The individual and synergistic effects of PD, SR, RM, and RS on seed yield and agronomic characteristics in North Dakota were herein investigated. Early and late PD, early and late RM cultivars, two SR (408,000 and 457,000 seed ha−1), and two RS (30.5 and 61 cm) were evaluated in four total environments in 2019 and 2020. Maximizing green canopy cover prior to the beginning of flowering improved seed yield. Individual factors of early PD and narrow RS resulted in yield increase of 311 and 266 kg ha−1, respectively. The combined factors of early PD, late RM, high SR, and narrow RS improved yield by 26% and provided a $350 ha−1 partial profit over conventional practices. Canopy cover and yield had relatively weak relationships with r2 of 0.36, 0.23, 0.14, and 0.21 at the two trifoliolate, four trifoliolate, beginning of flowering, and beginning of pod formation soybean growth stages, respectively. Producers in the most northern soybean region of the USA should combine early planting, optimum RM cultivars, 457,000 seed ha−1 SR, and 31 cm RS to improve yield and profit compared to current management practices.

scholarly journals Effect of Row Spacing and Seeding Rate on Russian Thistle (Salsola tragus) in Spring Barley and Spring Wheat

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 126
Author(s):  
Judit Barroso ◽  
Nicholas G. Genna
Keyword(s):  
Seed Production ◽  
Crop Yield ◽  
Spring Wheat ◽  
Plant Biomass ◽  
Integrated Management ◽  
Spring Barley ◽  
Management Strategies ◽  
Crop Productivity ◽  
Row Spacing ◽  
Seeding Rate

Russian thistle (Salsola tragus L.) is a persistent post-harvest issue in the Pacific Northwest (PNW). Farmers need more integrated management strategies to control it. Russian thistle emergence, mortality, plant biomass, seed production, and crop yield were evaluated in spring wheat and spring barley planted in 18- or 36-cm row spacing and seeded at 73 or 140 kg ha−1 in Pendleton and Moro, Oregon, during 2018 and 2019. Russian thistle emergence was lower and mortality was higher in spring barley than in spring wheat. However, little to no effect of row spacing or seeding rate was observed on Russian thistle emergence or mortality. Russian thistle seed production and plant biomass followed crop productivity; higher crop yield produced higher Russian thistle biomass and seed production and lower crop yield produced lower weed biomass and seed production. Crop yield with Russian thistle pressure was improved in 2018 with 18-cm rows or by seeding at 140 kg ha−1 while no effect was observed in 2019. Increasing seeding rates or planting spring crops in narrow rows may be effective at increasing yield in low rainfall years of the PNW, such as in 2018. No effect may be observed in years with higher rainfall than normal, such as in 2019.

Variety selection, planting date, row spacing, and seeding rate

1998 ◽  
Author(s):  
Larry Heatherly ◽  
Alan Blaine ◽  
Harry Hodges ◽  
Richard Wesley ◽  
Normie Buehring
Keyword(s):  
Planting Date ◽  
Row Spacing ◽  
Seeding Rate ◽  
Variety Selection

scholarly journals Продуктивність коріандру залежно від строків сівби, норми висіву та ширини міжрядь у північному Степу України

2013 ◽  
pp. 45-48
Author(s):  
Г. М. Козелець
Keyword(s):  
Early Spring ◽  
Fruit Yield ◽  
Row Spacing ◽  
Seeding Rate ◽  
Seed Rate

Наведено результати досліджень впливу норми висіву і ширини міжрядь на продуктивність коріандру за підзимового та ранньовесняного строків сівби.Встановлено, що кращим строком сівби для коріандру є підзимовий, за якого врожайність плодів становила 1,21 т/га, що більше порівняно із ранньовесняним на 0,30 т/га, або 24,7 %. Для коріандру в умовах північного Степу оптимальною є норма висіву 2,0–2,5 млн сх. нас. на 1 га, яка забезпечила урожайність 1,14–1,15 т/га. Сівба з шириною міжрядь 0,45 м сприяла отриманню врожайності 1,09 т/га, що більше ніж при 0,15 м на 0,06 т/га, або 8,0 %. Вищий рівень врожаю (1,39 т/га) отримано за підзимового строку сівби з шириною міжрядь 0,45 м та нормою висіву 2,0 млн сх. нас. на 1 га. The results of investigations of the effect of seed rate and row spacing on the productivity of coriander on the podzim and early spring yields are given.It was established that the best seeding period for coriander is the podzimovy, in which the fruit yield was 1.21 t / ha, which is more compared to the early spring by 0.30 t / ha, or 24.7%. For a coriander in the conditions of the northern steppe, the seeding rate of 2.0-2.5 million cu is optimal. us. per 1 hectare, which yields 1.14-1.15 t / ha. A seam with a width of 0.45 m row spacings contributed to yielding 1.09 t / ha, which is more than 0.15 m at 0.06 t / ha, or 8.0%. The highest level of harvest (1.39 t / ha) was obtained for the podium seeding period with a width of rows of 0.45 m and a seeding rate of 2.0 million growing seeds per 1 hectare.

scholarly journals Analytical Study of the Process of Sowing Seeds of Conifers by Pin Sowing Unit

2017 ◽  
Vol 7 (3) ◽  
pp. 201-210
Author(s):  
Игорь Казаков ◽  
Igor' Kazakov ◽  
Владимир Казаков ◽  
Vladimir Kazakov
Keyword(s):  
Research Process ◽  
Forest Tree ◽  
Gear Ratio ◽  
Technological Parameters ◽  
Seeding Rate ◽  
Coniferous Species ◽  
Analytical Research ◽  
Forest Nurseries ◽  
Sowing Machine

The cultivation of seedlings in forest tree nurseries for reforestation and afforestation is an important task of forestry. For sowing seeds of coniferous species in forest nurseries seeder with coil sowing machines are used, which do not provide the desired uniformity of seeding and damage seeds when sowing. Pin sowing machines allow you to eliminate these drawbacks, so research process is interested for forestry. As a result of the research of the process of sowing seeds of conifers by sowing machines with pin metering apparatus, formulas for determination of its angular velocity and rotational speed of the drive of furrow making roller. Formulas to determine seeding rate are proposed, taking into account constructive parameters of seeding machine and size of pins. It is noted that the increase in height and width of pins and also fill factor and number of rows of pins leads to the increase in standards; and increase in gear ratio of the actuator causes its decrease. Uneven supply of seed increases with increased size of pins, so thickness of pins is recommended to be minimum one, taking into account its sufficient strength. Conducted analytical research of the process of work of pin sowing unit enabled to obtain the necessary expressions for calculating structural and technological parameters of the forest sowing machine for sowing seeds of coniferous species in forest nurseries.

Residue management increases seed yield of three turfgrass species on the Canadian prairies

2002 ◽  
Vol 82 (4) ◽  
pp. 687-692 ◽  
Author(s):  
B. D. Gossen ◽  
J. J. Soroka ◽  
H. G. Najda
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Poa Pratensis ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Residue Management ◽  
Row Spacing ◽  
Seeding Rate ◽  
Canadian Prairies ◽  
The Impact

Little information is available on the management of turfgrass species for seed production in the Canadian prairies. The objective of these studies was to assess the impact of residue management and row spacing on seed yield under irrigation. A factorial experiment was seeded at Saskatoon, SK, in 1993 to assess the impact of burning or scalping (very close mowing with residue removal) vs. mowing, and 20- vs. 40-cm row spacing on seed yield of Kentucky bluegrass (KBG) (Poa pratensis), creeping red fescue (CRF) (Festuca rubra subsp. rubra) and creeping bentgrass (CBG) (Agrostis palustris). Also, a residue management trial on KBG was seeded at Brooks, AB, in 1993. At Saskatoon, yield was higher at 20-cm spacing across all three species in 1994, but spacing had no impact on winter survival, stand density, tiller growth or yield in subsequent years. Burning and scalping consistently resulted in earlier spring green-up, a higher proportion of fertile tillers, and higher seed yield than mowing. Even with residue management, yield declined after one harvest in CBG and CRF, and after two harvests in KBG. At Brooks, residue management had a similar impact on yield of KBG. A second trial at Brooks examined the impact of row spacing (20, 40, 60 cm) and seeding rate (0.5 to 6 kg seed ha-1) on KBG. Seed yield was highest at 40-cm spacings in 1994, at 60 cm in 1995, and at 40 to 60 cm in 1996. Seeding rate did not have a consistent effect on yield. We conclude that a combination of residue management and 20- to 40-cm spacings provide the highest, most consistent seed yields for these turfgrass species in this region. Key words: Burning, clipping, turfgrass, seed production, row spacing, Poa, Festuca, Agrostis

Row Spacing and Seeding Rate Effects on Eastern Black Nightshade (Solanum Ptycanthum) and Soybean

2007 ◽  
Vol 21 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Adrienne M. Rich ◽  
Karen A. Renner
Keyword(s):  
Dry Weight ◽  
Field Studies ◽  
Production Costs ◽  
Row Spacing ◽  
Seeding Rate ◽  
Soybean Yield ◽  
Eastern Black Nightshade ◽  
Solanum Ptycanthum ◽  
Black Nightshade ◽  
Rate Effects

Reducing seeding rates in 19- or 76-cm row soybean below the optimum rate may reduce soybean competitiveness with weeds, and indirectly increase production costs to the grower. Field studies in 2001 and 2002 evaluated the effect of soybean seeding rate and row spacing on the emergence, growth, and competitiveness of eastern black nightshade (EBN) in soybean. EBN emergence ceased within 45 d after planting (DAP), and was similar across soybean seeding rates and row spacing. EBN control by glyphosate was not affected by soybean population or row spacing. Soybean planted in 19-cm rows was more competitive with EBN, regardless of seeding rate. Increasing the soybean seeding rate in 76-cm rows from 185,000 seeds/ha to 432,000 seeds/ha reduced EBN dry weight threefold at East Lansing and nearly twofold at Clarksville in 2002. There was no increase in EBN density or dry weight in 19-cm row soybean planted at 308,000 seeds/ha compared with 556,000 seeds/ha, whereas a seeding rate of 432,000 seeds/ha in 76-cm row soybean did not suppress EBN dry weight or increase soybean yield in the presence of EBN compared with a seeding rate of 308,000 seeds/ha.

Integrated Wild Oat (Avena fatua) Management Affects Spring Barley (Hordeum vulgare) Yield and Economics

1992 ◽  
Vol 6 (1) ◽  
pp. 129-135 ◽  
Author(s):  
David L. Barton ◽  
Donald C. Thill ◽  
Bahman Shafii
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Control Strategies ◽  
Integrated Control ◽  
Spring Barley ◽  
Barley Grain ◽  
Row Spacing ◽  
Wild Oat ◽  
Seeding Rate ◽  
Net Return

The effect of barley seeding rate and row spacing, and triallate, diclofop, and difenzoquat herbicide rate on barley grain yield and quality, and wild oat control were evaluated in field experiments near Bonners Ferry, Idaho, in 1989 and 1990. The purpose of the study was to develop integrated control strategies for wild oat in spring barley. Barley row spacing (9 and 18 cm) did not affect barley grain yield. Barley grain yield was greatest when barley was seeded at 134 or 201 kg ha–1compared to 67 kg ha–1. Wild oat control increased as wild oat herbicide rate increased and barley grain yield was greatest when wild oat herbicides were applied. However, barley grain yield was similar when wild oat biomass was reduced by either 65 or 85% by applications of half and full herbicide rates, respectively. Net return was greatest when the half rate of herbicide was applied to 100 wild oat plants per m2and was greatest when half or full herbicide rates were applied to 290 wild oat plants per m2. Net return increased when the seeding rate was increased to 134 or 201 kg ha–1when no herbicide was applied and when 290 wild oat plants per m2were present.

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