Weed control, large seeds and deep roots: Drivers of success in direct seeding for savanna restoration

2020 ◽  
Vol 23 (3) ◽  
pp. 406-416 ◽  
Author(s):  
Raquel A. Passaretti ◽  
Natashi A. L. Pilon ◽  
Giselda Durigan
Keyword(s):  
Weed Control ◽  
Direct Seeding ◽  
Deep Roots

scholarly journals Weed Control in Direct-Seeding Rice Culture

1973 ◽  
Vol 1973 (16) ◽  
pp. 7-11
Author(s):  
Takayoshi KATAOKA
Keyword(s):  
Weed Control ◽  
Direct Seeding ◽  
Rice Culture

scholarly journals Impact of sowing methods and weed control practices on yield and economics of wet direct seeded rice

2021 ◽  
Vol 58 (3) ◽  
pp. 375-383
Author(s):  
BS Satapathy ◽  
B Duary ◽  
Sanjoy Saha ◽  
S Munda ◽  
D Chatterjee
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Weed Control ◽  
Direct Seeding ◽  
Weed Competition ◽  
Weed Species ◽  
Cyperus Difformis ◽  
Control Options ◽  
Direct Seeded ◽  
Crop Weed Competition

Wet direct seeding is proved as a viable alternate to conventional transplanting method of rice. Maintenance of optimum population by adopting an appropriate sowing method followed by judicious weed control practices ensures profitability of wet direct seeded rice (W-DSR). A field experiment was carried out to find out a suitable sowing technique and weed control options for enhancing productivity and economics of W-DSR. The W-DSR was infested with twelve numbers of weed species comprising of eight families under different sowing methods. The composition of sedges, broadleaved (BLW) and grassy weeds was 83.07, 11.0 and 5.93%, respectively. Irrespective of sowing methods, weeds such as, Echinochloa glabrescens and Leptochloa chinensis among grasses, Cyperus difformis and Scirpus juncoides among sedges and Lindernia anagallis among BLW were dominant. Drum seeding recorded 6.9 and 12.7% higher gross and net return, respectively than broadcasting, but it was at par with spot seeding. Highest B: C ratio of 2.07 was recorded with drum seeding, whereas spot seeding recorded lowest B: C ratio (1.99). Crop-weed competition caused 31.7% reduction in grain yield with W-DSR. Application of early post-emergent herbicide bensulfuron-methyl + pretilachlor @ 60+600 g/ha at 10 DAS, azimsulfuron @ 35 g/ha at 20 DAS, and bispyribac sodium @ 30 g/ha at 20 DAS recorded increase in grain yield 40.3, 40.1 and 39.8%, respectively over the weedy check. Ready mix bensulfuron-methyl + pretilachlor @ 60+600 g/ha at 10 DAS registered highest B: C ratio (2.16) but it did not vary significantly with bispyribac sodium @ 30 g/ha and azimsulfuron @ 35 g/ha.

Corn gluten meal—a natural preemergence herbicide: Effect on vegetable seedling survival and weed cover

2000 ◽  
Vol 15 (4) ◽  
pp. 189-191 ◽  
Author(s):  
Melissa C. McDade ◽  
Nick E. Christians
Keyword(s):  
Weed Control ◽  
Sweet Corn ◽  
Seedling Survival ◽  
Direct Seeding ◽  
Corn Gluten Meal ◽  
Corn Gluten ◽  
Weed Cover ◽  
Important Pest ◽  
Field Plots

AbstractWeeds are considered the most important pest group for farmers interested in lowering external inputs and avoiding synthetic chemical use. Corn gluten meal (CGM) is a natural preemergence weed control used in turfgrass, which reduces germination of many broadleaf and grass weeds. The objective of this study was to investigate weed cover and vegetable seedling survival in field plots when CGM is incorporated before planting. Three studies were conducted, with three replications for each study. Five rates of powdered CGM (0,100, 200, 300, and 400 g m–2) were weighed and incorporated into the top 5–8 cm of soil in recently disked 1.5-m by 2.7-m plots. Seeds of eight vegetables were each planted in rows 1.4 m long and 0.3 m apart. Seedling survival and percentage of weed cover were recorded for each plot. Corn gluten meal at rates of 100, 200, 300, and 400 g m–2reduced mean weed cover by 50, 74, 84, and 82%, respectively, compared with the control. Seedling survival at 100 g CGM per m2was reduced by 67% for ‘Comanche’ onion, 35% for ‘Ruby Queen’ beet, 41% for ‘Red Baron’ radish, 71% for ‘Provider’ bean, 73% for ‘Scarlet Nantes’ carrot, 59% for ‘Maestro’ pea, and 68% for ‘Black Seeded Simpson’ lettuce, compared with the control. Seedling survival for ‘Daybreak’ sweet corn was not reduced by rates of 100 or 200 g CGM per m2, but was reduced by 26% at a rate of 300 g CGM per m2compared with the control. Because of the reduction in seedling survival at even the lowest rate of CGM (100 g m–2), direct seeding of these vegetables into soil into which CGM has been incorporated is not advisable. Using transplants may be an alternative that takes advantage of the herbicidal effects of CGM and the nitrogen it provides.

Second-year weed control for direct seeding ofEucalyptus porosain a low rainfall environment

1998 ◽  
Vol 61 (2) ◽  
pp. 155-158 ◽  
Author(s):  
P. P. Barron ◽  
G. S. Dalton ◽  
L. Miller
Keyword(s):  
Weed Control ◽  
Direct Seeding ◽  
Second Year

Productivity, sustainability, and rainfall-use efficiency in Australian rainfed Mediterranean agricultural systems

2005 ◽  
Vol 56 (11) ◽  
pp. 1123 ◽  
Author(s):  
Neil C. Turner ◽  
Senthold Asseng
Keyword(s):  
Weed Control ◽  
Nitrogen Availability ◽  
New Technologies ◽  
Disease Risk ◽  
Farming Systems ◽  
Agricultural Systems ◽  
Deep Drainage ◽  
Deep Roots ◽  
Environmentally Sustainable ◽  
Perennial Vegetation

Mediterranean environments are characterised by hot, dry summers and cool, wet winters. The native vegetation in Mediterranean-climatic regions is predominantly perennial shrubs and trees intermixed with annual forbs. In south-western Australia, the spread of agriculture has seen the well adapted perennial vegetation replaced by rainfed annual crops and pastures. This has increased waterlogging and secondary salinity, thereby causing loss of productivity in ~10% of the cleared land area. To reduce deep drainage and make the agricultural systems environmentally sustainable requires the re-introduction of perennial vegetation in the form of belts of trees or shrubs, and phase-farming systems with perennials such as lucerne replacing annual pastures between the cropping years. To be economically viable, agricultural productivity needs to increase by at least 3% per annum. Yields of dryland wheat, the predominant crop in the Mediterranean agricultural regions of Australia, have increased at ~1%/year for the century preceding the 1980s and since then by nearly 4%/year. Increases have arisen from both genotypic and agronomic improvements. Genotypic increases have arisen from selection for earliness, early vigour, deep roots, osmotic adjustment, increased transpiration efficiency, improved disease resistance, and an improved harvest index from high ear weight (grain number) at flowering and high assimilate storage and remobilisation. Agronomic increases have arisen from early sowing that has been enabled by minimum tillage, increased fertiliser use, especially nitrogen, weed control, and rotations to improve weed control, minimise disease risk, and increase nitrogen availability. Evidence is presented suggesting that the rapid increase in yield of wheat in the last two decades has likely arisen from the rapid adoption of new technologies. For productivity to be maintained in the face of the increasing requirement to be environmentally sustainable will be a challenge and will require better integration of breeding and agronomy.

An Agro-Economic Analysis of Field Trials from a Farming Systems Research Perspective: Weed Control in Rainfed Lowland Rice in Senegal

1991 ◽  
Vol 27 (3) ◽  
pp. 231-241 ◽  
Author(s):  
Joshua L. Posner ◽  
Eric W. Crawford
Keyword(s):  
Economic Analysis ◽  
Weed Control ◽  
Farming Systems ◽  
Economic Benefits ◽  
Economic Effects ◽  
Lowland Rice ◽  
Direct Seeding ◽  
Research Perspective ◽  
Systems Research ◽  
Rainfed Lowland

SummaryUsing a farming systems approach, a multidisciplinary team in southern Senegal examined three strategies for weed control in rainfed lowland rice: use of herbicide; replacement of broadcast seeding by row seeding with mechanical seeders; and transplanting compared with direct seeding of rice. Thorough evaluation of the agronomic and economic benefits of these strategies for farmers was facilitated by supplementing the standard analysis of on-farm trials with multivariate analysis incorporating agronomic survey data to explain treatment effects better, and by considering technical and economic effects throughout the farming system. The agro-economic analysis led the team to conclude that: where soils are productive, herbicide use is a profitable investment; when converting to direct seeding, farmers should facilitate weeding by seeding in rows with a mechanical seeder; and transplanting should not be discouraged in areas where it is still feasible, since it is less time-consuming, fits in better with other farm activities and requires less fertilizer.

scholarly journals Influence of sowing dates and methods of weed control on the growth, development and productivity of sunflower in direct seeding technology

2021 ◽  
Vol 204 (01) ◽  
pp. 2-10
Author(s):  
Viktor Dridiger ◽  
Natal'ya Gorshkova
Keyword(s):  
Weed Control ◽  
Negative Impact ◽  
Field Studies ◽  
Direct Seeding ◽  
Soil Drought ◽  
North Caucasus ◽  
The North ◽  
Federal Research ◽  
Sowing Dates ◽  
Growth Development

Abstract. When cultivating sunflower using direct seeding technology, its yield largely depends on the time of sowing and the effectiveness of weed control. The purpose of the research is to study the influence of sowing dates and methods of weed control on the growth, development and productivity of sunflower cultivated using direct seeding technology in the zone of unstable moisture in the Stavropol territory. Methods. Field studies were conducted in the experimental field of the North Caucasus Federal research center (zone of unstable moisture of the Stavropol territory) in 2018–2019, where the objects of research were sunflower crops on April 5–10, April 25–30 and May 15–20, cultivated using direct seeding technology with herbicides according to the following scheme: without the use of herbicides (control), spraying of weeds with a continuous herbicide from the group of glyphosates 5–7 days before sowing sunflower (glyphosate), glyphosate + soil herbicide, which was sprayed on plots after sowing the crop, and glyphosate + herbicide Euro-Lightning, used in the phase of 3–4 pairs of real sunflower leaves. Results. It was found that the transfer of sunflower sowing dates from April to the second decade of may leads to an increase in field germination of seeds, reducing the negative impact of atmospheric and soil drought during the growing season of the crop, which ensures the formation of a significantly greater vegetative mass of plants compared to the April sowing dates. The highest yield is formed by sunflower when sown in the second decade of May with the pre-sowing application of a continuous herbicide from the group of glyphosates in combination with a soil herbicide (2.45 t/ha) and the same glyphosate with the spraying of crops with Euro-Lightning herbicide in the phase of 3–4 pairs of leaves – 2.41 t/ha. Sowing sunflower in April, as well as the refusal to use herbicides or only pre-sowing spraying of the soil with glyphosate leads to a significant decrease in crop yield.

scholarly journals Weed Control and Safety of Transgenic Rice Event, CPPO06 in Direct-Seeding Flooded Rice Field

2015 ◽  
Vol 4 (1) ◽  
pp. 44-48
Author(s):  
Ok Jae Won ◽  
Su Hyuk Park ◽  
Min Yong Eom ◽  
Chang-Gi Kim ◽  
Bum Kyu Lee ◽  
...  
Keyword(s):  
Weed Control ◽  
Transgenic Rice ◽  
Rice Field ◽  
Direct Seeding ◽  
Flooded Rice ◽  
Flooded Rice Field

Religious Studies of Democratic Ukraine

2001 ◽  
pp. 3-12
Author(s):  
Anatolii M. Kolodnyi
Keyword(s):  
Religious Studies ◽  
Religious Experiences ◽  
Divine Nature ◽  
Deep Roots ◽  
Integral System ◽  
The World

Ukrainian religious studies have deep roots. We find the elements of it in the written descendants of the writings of Kievan Rus. From the prince's time, the universal way of vision, understanding and appreciation of the world for many Ukrainian thinkers becomes their own religious experiences. The main purpose of their works is not the desire to create a certain integral system of theological knowledge, but the desire to convey their personal religious-minded perception of the divine nature, harmony, beauty and perfection of God created the world.

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