scholarly journals Studies on production techniques of some herb plants: II Row spacing and cutting height of dill herb (anethum graveolens L.)

1987 ◽  
Vol 59 (1) ◽  
pp. 37-40
Author(s):  
S. Hälvä
Keyword(s):  
Row Spacing ◽  
Anethum Graveolens ◽  
Leaf Yield ◽  
Production Techniques ◽  
The Difference ◽  
Narrow Row ◽  
Cutting Height

A study was undertaken to determine the row spacing and cutting height of dill to produce a good quality herb in terms of high proportion of leaves. The row spacings were 12.5 or 25 cm, and the herb was harvested to the stubbles of 7.5, 11 or 15 cm. The greatest dry leaf yield, 8 kg/100 m2, was achieved with the narrow row spacing and lowest stubble. The proportion of leaves of the dry herb was highest (68 %) when cut to the highest stubble. The difference in the yields between the cuttings of 7.5 and 15 cm was significant, only. The relation between the dry and fresh yields (11 %) remained unaffected.

Narrow Row Spacing and Canopy Formation Reduces Weed Resurgence in Soybeans (Glycine max)

1991 ◽  
Vol 5 (1) ◽  
pp. 169-174 ◽  
Author(s):  
Fred H. Yelverton ◽  
Harold D. Coble
Keyword(s):  
Soil Surface ◽  
Planting Date ◽  
Row Spacing ◽  
Surface Irrigation ◽  
Active Radiation ◽  
Late Planting ◽  
Soybean Canopy ◽  
The Difference ◽  
Narrow Row ◽  
Radiation Measurements

In 1982 and 1983, effects of soybean row spacing and irrigation on weed resurgence following postemergence herbicide applications were evaluated. Also, ‘Forrest’ and ‘Ransom’ cultivar effects and early and late planting date influences on weed resurgence were evaluated in 1982 and 1983, respectively. In both years, as row spacing increased, weed resurgence increased. Photosynthetically active radiation measurements indicated the amount of weed resurgence coincided closely with the differing amounts of light penetrating to the soil surface. Irrigation, planting date, and cultivars showed no significant effect on weed resurgence. In 1982, a significant cultivar by row spacing interaction was obtained. In 1983, the late planting date showed a trend for less weed resurgence under irrigated conditions, although the difference was not significant. Soybean canopy measurements indicated development was greater under irrigation.

Effect of different planting densities on yield and yield components of wild thyme (Thymbra spicatavar. spicata)

2005 ◽  
Vol 53 (4) ◽  
pp. 417-422
Author(s):  
S. Kizil ◽  
Ö. Tonçer
Keyword(s):  
Essential Oil ◽  
Oil Yield ◽  
Planting Density ◽  
Row Spacing ◽  
Leaf Yield ◽  
Herbage Yield ◽  
Wild Thyme ◽  
Narrow Row ◽  
Thymbra Spicata ◽  
Essential Oil Yield

The study reports the effect of the planting density of wild thyme (Thymbra spicatavar. spicata) on plant height, fresh herbage yield, dry herbage yield, dry leaf yield, essential oil content and essential oil yield. The results show that the highest fresh and dry herbage, dry leaf yield and essential oil yield were obtained from narrow row spacing and in-rows. However, fresh herbage, dry leaf yield and essential oil yield showed a variation of 0.993-1.463 kg m-2, 0.179-0.279 kg m-2and 33.6-50.9 L ha-1, respectively.

INFLUENCE OF METHODS FOR SELECTION OF PLANTS AND WAYS OF SEEDING ON EFFICIENCY OF ORIGINAL SEEDS OF FLAX-DOLGUNETS GRROWING IN PRIMARY SEED BREEDING

2020 ◽  
Keyword(s):  
Seed Yield ◽  
Control Level ◽  
Row Spacing ◽  
High Germination ◽  
Breeding Efficiency ◽  
Flax Seeds ◽  
Narrow Row ◽  
Seed Propagation ◽  
Selection Of

The results of scientific research are presented, which made it possible to develop less labor-intensive methods for selecting flax plants to grow original (updated) seeds. Studies have shown that a positive selection of tall plants of flax, compared with the accepted counterpart (control), increased seed yield 1.7-1.9 times. Moreover, plant homogeneity according to the main characteristics (height and fiber content in the stem) characterizing the varietal quality of grown seeds turned out to be at the control level. A negative selection, involving the removal of atypical plants, provided an increase in the output volume of seeds compared to the control by 3.9-4.1 times. This selection method did not reduce the varietal quality of seed material compared to the accepted analogue. With both selection methods, after combining typical plants, seeds with the same high germination rates were obtained (96-99 %). The breeding efficiency of the grown flax seeds using narrow-row sowing methods is shown. Studies have established that narrow-row sowing of seeds with a row-spacing of 7.5 and 6.25 cm compared with sowing by a wide-row method significantly increased their yield by 2.8-3.0 and 2.3-3.0 kg / ha, respectively. The greatest influence on the formation of seed yield in narrow-row sowing (6.25 cm) was exerted by the method of sowing, the part of which was 76.1 %. As the length of seed propagation of flax in creased (up to the uterine elite 2 years) in narrow-row sowing (6.25 cm) compared to broad-row, there was no decrease in quality indicators - germination and seed strength.

Production of Cotton on Narrow Row Spacing

1992 ◽  
Vol 35 (4) ◽  
pp. 1109-1112 ◽  
Author(s):  
J. R. Williford
Keyword(s):  
Row Spacing ◽  
Narrow Row

Weed Control with Reduced Rates of Chlorimuron Plus Metribuzin and Imazethapyr in No-Till Narrow-Row Soybean (Glycine max)

1998 ◽  
Vol 12 (1) ◽  
pp. 32-36 ◽  
Author(s):  
William G. Johnson ◽  
Jeffrey S. Dilbeck ◽  
Michael S. Defelice ◽  
J. Andrew Kendig
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Field Studies ◽  
Weed Suppression ◽  
Crop Response ◽  
Soybean Production ◽  
No Till ◽  
Giant Foxtail ◽  
The Difference ◽  
Narrow Row

Field studies were conducted at three locations in 1993 and 1994 to evaluate weed control and crop response to combinations of glyphosate, metolachlor, 0.5 X and 1 X label rates of chlorimuron plus metribuzin applied prior to planting (PP), and 0.5 X and 1 X label rates of imazethapyr applied early postemergence (EPOST) or postemergence (POST) in no-till narrow-row soybean production. Giant foxtail densities were reduced with sequential PP followed by (fb) EPOST or POST treatments. Large crabgrass was reduced equivalently with all herbicide combinations involving chlorimuron plus metribuzin PP fb imazethapyr. Common cocklebur control was variable but was usually greater with treatments that included imazethapyr. Ivyleaf morningglory densities were not reduced with any herbicide combinations. Sequential PP fb EPOST or POST treatments tended to provide slightly better weed suppression than PP-only treatments, but the difference was rarely significant. Soybean yields with treatments utilizing 0.5 X rates were usually equal to 1 X rates.

Alley cropping kenaf (Hibiscus cannabinus) with leucaena (Leucaena leucocephala) in south-eastern Queensland

1988 ◽  
Vol 28 (4) ◽  
pp. 481 ◽  
Author(s):  
RC Gutteridge
Keyword(s):  
Leucaena Leucocephala ◽  
Alley Cropping ◽  
Phosphorus Deficiency ◽  
Hibiscus Cannabinus ◽  
Row Spacing ◽  
Lower Yield ◽  
South Eastern ◽  
Fresh Material ◽  
Cotton South ◽  
Cutting Height

Kenaf (Hibiscus cannabinus) was intercropped for 3 seasons between hedgerows of leucaena (Leucaena leucocephala) spaced 3 or 5 m apart on an infertile soil at Mt Cotton, south-eastern Queensland. The leucaena was cut at a height of25 or 50 cm, 2 or 4 times per season and the fresh material spread as a mulch between the rows of kenaf. The yield of kenaf from mulched plots was compared with that from plots fertilised with nitrogen as urea at 0, 50 or 100 kg N/ ha.year. In the third season, kenaf yield from the mulched plots was maintained at about 4.7 t DM/ha, whereas that from the control and urea fertilised plots declined by about 30%. However, phosphorus deficiency in the unmulched plots was suspected and this may have contributed to the lower yield. Leucaena row spacing had no significant effect on kenaf yield. Leucaena yield ranged from 2 to 4 t DM/ha per season. Cutting height had no significant effect on leucaena yield, but less frequent pruning gave a higher yield in the second and third seasons. The results confirm the potential of alley cropping to sustain arable crop yield at a moderate level without high inputs of inorganic fertilisers.

Influence of row spacing and cultivar selection on annual ryegrass (Lolium rigidum) control and grain yield in chickpea (Cicer arietinum)

2019 ◽  
Vol 70 (2) ◽  
pp. 140 ◽  
Author(s):  
Gulshan Mahajan ◽  
Kerry McKenzie ◽  
Bhagirath S. Chauhan
Keyword(s):  
Grain Yield ◽  
Cicer Arietinum ◽  
Weed Management ◽  
Integrated Management ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Row Spacing ◽  
Annual Ryegrass ◽  
Lolium Rigidum ◽  
Narrow Row

Annual ryegrass (ARG) (Lolium rigidum Gaudin) is a problematic weed for chickpea (Cicer arietinum L.) production in Australia. Understanding the critical period of control of ARG in chickpea is important for developing effective integrated management strategies to prevent unacceptable yield loss. Experiments were conducted over 2 years at the research farm of the University of Queensland, Gatton, to evaluate the effect of chickpea row spacing (25 and 75cm) and cultivar (PBA Seamer and PBA HatTrick) and ARG infestation period (from 0, 3 and 6 weeks after planting (WAP), and weed-free) on ARG suppression and grain yield of chickpea. Year×treatment interactions were not significant for any parameter, and none of the treatment combinations showed any interaction for grain yield. Average grain yield was greater (20%) with 25-cm than 75-cm rows. On average, PBA Seamer had 9% higher yield than PBA HatTrick. Average grain yield was lowest in season-long weedy plots (562kg ha–1) and highest in weed-free plots (1849kg ha–1). Grain yield losses were lower when ARG emerged at 3 WAP (1679kg ha–1). Late-emerged ARG (3 and 6 WAP) had lower biomass (4.7–22.2g m–2) and number of spikes (5–24m–2) than ARG that emerged early; at 0 WAP, weed biomass was 282–337g m–2 and number of spikes 89–120m–2. Compared with wide row spacing, narrow row spacing suppressed ARG biomass by 16% and 52% and reduced number of spikes of ARG by 26% and 48% at 0 WAP and 3 WAP, respectively. PBA Seamer suppressed ARG growth more effectively than PBA HatTrick, but only in the season-long weedy plots. Our results imply that in ARG-infested fields, grain yield of chickpea can be increased by exploring narrow row spacing and weed-competitive cultivars. These cultural tools could be useful for developing integrated weed management tactics in chickpea in combination with pre-emergent herbicides.

EFFECTS OF SEEDING RATE AND ROW SPACING ON AGRONOMIC CHARACTERISTICS OF GLENLEA, PITIC 62 AND NEEPAWA WHEATS

1975 ◽  
Vol 55 (2) ◽  
pp. 363-367 ◽  
Author(s):  
K. G. BRIGGS
Keyword(s):  
Triticum Aestivum ◽  
Unit Area ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Test Weight ◽  
Row Spacing ◽  
Seeding Rate ◽  
Days To Maturity ◽  
Narrow Row ◽  
Plot Design

Three cultivars of wheat (Triticum aestivum L. em Thell.), Glenlea, Pitic 62 and Neepawa, were grown in a seeding rate and row spacing experiment at two locations in 1972 and 1973. In a split-plot design, row spacings of 15, 23 and 30 cm were used as main plots, and subplot seeding rates of 33.6, 67.3 and 100.9 kg/ha were applied for each cultivar. Data were collected on yield, days to maturity, plant height, lodging, kernel weight and test weight. The few significant effects of row spacing indicated that narrow row spacings tend to increase yield and decrease days to maturity. Higher seeding rates per unit area generally resulted in higher yields for all cultivars and, to some extent, earlier maturity. Glenlea wheat seeded at 100.9 kg/ha gave the highest yield in all tests, and at this seeding rate took an average 125 days to reach maturity, compared to 120 days for Neepawa and 129 days for Pitic 62. Seeding rate had virtually no effect on height, kernel weight or test weight of any of the wheats.

Sicklepod (Cassia obtusifolia) Control in Soybean (Glycine max) Grown in Rotations of 97- and 18-cm Row Spacings

Weed Science ◽  
1989 ◽  
Vol 37 (6) ◽  
pp. 748-752 ◽  
Author(s):  
David R. Shaw ◽  
Clyde A. Smith ◽  
Charles E. Snipes
Keyword(s):  
Glycine Max ◽  
Soil Ph ◽  
Control Program ◽  
Control Measures ◽  
Effective Control ◽  
Row Spacing ◽  
Split Application ◽  
The Third ◽  
Ph Conditions ◽  
Narrow Row

Various 3-yr rotation sequences of 97- and 18-cm row spacings, with appropriate sicklepod control treatments within each row spacing, were implemented to evaluate sicklepod population and soybean yield at two locations. Alachlor plus metribuzin applied preemergence followed by either a postemergence-directed spray of metribuzin plus 2,4-DB or hand hoeing in 97-cm rows consistently reduced sicklepod populations. Reductions with 97-cm rows and preemergence-applied herbicides coupled with cultivation were not as great. At one location, using a split application of metribuzin preplant incorporated followed by preemergence with 18-cm rows reduced sicklepod populations if effective control measures had been used in wide rows the previous year, but the narrow-row treatments did not reduce sicklepod numbers if 18-cm rows had been used previously. Soil-applied metribuzin was more effective under high soil pH conditions, and sicklepod populations were reduced substantially whether the previous row spacing was 18 or 97 cm. After the third year, all plots were planted in 97-cm rows with no herbicides. No differences were found among sicklepod populations with any previous row spacing or sicklepod control program, indicating that, even with 3 yr of effective control, subsequent sicklepod populations were not affected.

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