Effect of weed control treatments and hill-spacing on soybean and associated weeds

2004 ◽  
Vol 52 (1) ◽  
pp. 81-93 ◽  
Author(s):  
A. H. Galal
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Significant Influence ◽  
Field Experiments ◽  
Growth Yield ◽  
Dry Weight ◽  
Plant Weight ◽  
Plant Seed ◽  
Yield And Quality ◽  
Seed Index

Two field experiments were carried out at the Experimental Farm of Assiut University, during the 2000 and 2001 summer seasons, to study the effect of three hill spacings (5, 10 and 15 cm) and six weed control treatments on the associated weeds, plant growth, yield and quality of soybean. The weed control treatments were carried out with trifluralin, linuron, pendimethalin, bentazon and hand hoeing, with an unweeded treatment as the control. All the weed control treatments exerted a significant influence on the dry weight of weeds. Hand hoeing and pendimethalin treatment significantly decreased the dry weight of dicot and monocot weeds as compared to the unweeded treatment. Hand hoeing gave the lowest value of the dry weight of total weeds and the highest efficiency percentage. In general, the significantly lowest dry weight of total weeds was recorded for densely sown soybeans. The weed control treatments exerted a significant influence on all the characters under study (plant height, weight of pods and seeds/plant, number of plants at harvest, seed yield/ha). The height of the first pod was lowered by hand hoeing and the application of pendimethalin increased the number of pods/plant, while the highest values of number of branches/plant, seed index, oil and protein contents were obtained after linuron application. wider spacing produced higher values for the number of pods and branches/plant, weight of pods and seeds/plant, seed index and protein content and lowered the height of the first pod as compared to plants sown at closer spacing. The latter produced the highest values of number of plants/ha, seed yield/ha and oil content at harvest. The first order interaction exerted a significant influence on all the characters studied, the highest seed yield/ha (2728.6 kg) being obtained from sowing plants at 5 cm combined with hand hoeing.

scholarly journals Weed Control, Growth, Nodulation, Quality and Storability of Peas as Affected by Pre- and Postemergence Herbicides

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 307
Author(s):  
Ibrahim S. Abdallah ◽  
Karima F. Abdelgawad ◽  
Mohamed M. El-Mogy ◽  
Mohamed B. I. El-Sawy ◽  
Hend A. Mahmoud ◽  
...  
Keyword(s):  
Plant Height ◽  
Weed Control ◽  
Field Experiments ◽  
Positive Impact ◽  
Total Yield ◽  
Dry Weight ◽  
Nodule Formation ◽  
Chemical Compositions ◽  
Plant Weight ◽  
Control Growth

Weeds represent a major constraint for successful pea cultivation, resulting in loss of green pea yield and quality. Two field experiments were carried out during the winter seasons of 2018/2019 and 2019/2020. The objectives of the current study were to evaluate the efficacy of pendimethalin, butralin, fluazifop butyl, bentazon, and hoeing on weed control, and their impact on pea growth, nodule formation, yield, quality, and storability. The results indicated that hoeing and fluazifop butyl were the most effective treatments for weed control in terms of the lowest values of total weed dry weight. The bentazon and fluazifop butyl herbicides didn’t affect active nodules number, plant height, plant weight, root length, or number of leaves and branches. Additionally, bentazon and hoeing resulted in the highest total yield per plant and protein content. Butralin and pendimetalin achieved the lowest yield, and butralin also resulted in the lowest plant height and weight. Bentazon-treated peas had the highest chemical compositions in terms of chlorophyll, carotenoids, total sugar, and vitamin C contents in pea pods at harvest and during cold storage at 4 °C and 95 RH for 45 days. No detectable residues of the four herbicides under study were detected in green pods, suggesting that pods can be safely consumed at the time of harvesting. It can be concluded that nodules formation in pea was not affected significantly by the application of the tested herbicides, except pendimethalin and butralin. Furthermore, bentazon had a positive impact on nodules formation and pods quality and could be used effectively for controlling the broadleaf weeds, and it was simultaneously a selective and safe herbicide in pea cultivation.

scholarly journals Growth, nodulation, and yield of soybean and associated weeds as affected by weed management

2008 ◽  
Vol 26 (4) ◽  
pp. 855-863 ◽  
Author(s):  
M.T. Abdelhamid ◽  
I.M. El-Metwally
Keyword(s):  
Seed Yield ◽  
Weed Management ◽  
Field Experiments ◽  
Growth Yield ◽  
Dry Weight ◽  
The Other ◽  
Research Centre ◽  
Yield Attributes ◽  
Soybean Plants ◽  
Total Dry Weight

Two field experiments were conducted at the experimental farm of the National Research Centre at Shalakan, Kalubia Governorate, Egypt, during 2006 and 2007 seasons, to study the effect of three pre-emergence herbicides, prometryn [at the rate of 0.75, 1.5 and 2.25 kg ha-1], oxadiargyl [at the rate of 240, 480 and 720 g ha-1] and butralin [at the rate of 1.20, 2.40 and 3.36 kg ha-1], two hand hoeing treatments and a nonweeded check, on weed infestation, nodulation, growth, yield and yield attributes of soybean plants. Two hand hoeing treatments resulted in the highest weed depression expressed as the lowest fresh and dry weights of broadleaved, grassy and total weeds. The reduction percentage in weed dry matter compared to the nonweeded treatment was 98.3, 92.64 and 96.9% in broadleaved, grassy and total weeds, respectively. Application of the three herbicides at higher or recommended doses significantly reduced fresh and dry weight of the weeds compared to the nonweeded treatment. The results indicated that all the three herbicides at rates higher than the recommended markedly decreased the number, fresh and dry weight of nodules as well as root, shoot and total dry weight plant-1, while application of two hand hoeing treatments significantly increased these traits. Two hand hoeing treatments and pre-emergence herbicides at the recommended rates markedly increased soybean yield and its attributes. Two hand hoeing treatments gave the highest values of number of pods per plant-1, weight of pods per plant-1 and number of seeds per plant-1 by 140.7, 150.0 and 59.8%, respectively, compared to the nonweeded treatment. On the other hand, oxadiargyl at the recommended rate (480 g ha-1) was the best treatment for promoting seed yield (g plant-1), seed yield (kg ha-1) and biological yield (g plant-1) compared to the nonweeded treatment by 87.3, 85.0 and 88.2%, respectively. Prometryn at the rate of 1.50 kg ha-1, followed by two hand hoeing treatments, produced the highest shoot and seed protein percentage as well as seed oil percentage, compared to the other weed control treatments.

Preceding (Rice-Okra) Crops Herbicide Residual Effects on Weed, Growth, Yield and Economics of Succeeding Blackgram Under Different Ecosystem

2020 ◽  
Author(s):  
N. Bommayasamy ◽  
C. R. Chinnamuthu
Keyword(s):  
Weed Control ◽  
Field Experiments ◽  
Growth Yield ◽  
Residual Effect ◽  
Dry Weight ◽  
Residual Effects ◽  
Weed Growth ◽  
Weed Control Efficiency ◽  
Island Ecosystem ◽  
Hand Weeding

Field experiments were carried out during summer seasons of 2017 and 2018 to study the effect of preceding (Rice-Okra) crops herbicide residue on weed, growth, yield and economics of succeeding blackgram. Residual effect of butachlor at 1.25 kg/ha on 3 days after transplanting (DAT) fb hand weeding (HW) on 40 DAT imposed in the first season rice crop and followed by hand weeding (HW) twice at 20 and 40 days after sowing (DAS) (T6) in okra and blackgram significantly influenced the reduction of weed dry weight accumulation by 8.75 and 7.44 times in mainland and island ecosystem, respectively at 20 DAS. The same treatment recorded the highest weed control efficiency (WCE) of 88.6, 86.5 and 86.2, 80.7 % observed at 20 and 40 DAS under mainland and island ecosystem, respectively. Among, the weed control treatments, residual effect of butachlor at 1.25 kg/ha on 3 DAT fb HW on 40 DAT to rice and HW twice at 20 and 40 DAS (T6) to okra and blackgram has recorded 64.8 and 65.0% higher seed yield of blackgram under main and island ecosystem, respectively.

Effect of planting pattern and N splits on yield attributes, yield and quality of rainfed sunflower (Helianthus annuus L.)

2003 ◽  
Vol 51 (2) ◽  
pp. 157-162 ◽  
Author(s):  
M. Vijayakumar ◽  
P. Subbian ◽  
A. C. Lourduraj ◽  
R. Selvaraju
Keyword(s):  
Seed Yield ◽  
Tamil Nadu ◽  
Field Experiments ◽  
Growth Yield ◽  
Quality Parameters ◽  
Planting Pattern ◽  
Yield Attributes ◽  
North East ◽  
Yield And Quality

Field experiments were conducted at Tamil Nadu Agricultural University, Coimbatore, India during the North East Monsoon (October-December) seasons of 1997 and 1998 in a split plot design to study the effect of planting pattern and N splits on the yield attributes, yield and quality of rainfed sunflower. The main plot consisted of three plant populations (133,333 plants ha-1, 111,111 plants ha-1 and 88,888 plants ha-1) and the sub-plot treatments of six N split levels. The results revealed that the yield attributes of sunflower were higher at the closest spacing of 30 × 25 cm than at the widest spacing of 30 × 37.5 cm. The seed yield was higher at closer (30 × 25 cm) spacing in 1997 and at wider spacing (30 × 37.5 cm) in 1998. In both years the split application of nitrogen resulted in higher growth, yield attributes, seed yield and quality parameters when compared to full basal application.

Drip Irrigation and Stand Establishment Affect Yield and Quality of Cantaloupe

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 545d-545
Author(s):  
D.I. Leskovar ◽  
J.C. Ward ◽  
R.W. Sprague ◽  
A. Meiri
Keyword(s):  
Field Experiments ◽  
Irrigation System ◽  
Fruit Size ◽  
Growth Yield ◽  
Vegetable Production ◽  
Silty Clay ◽  
Dry Land ◽  
Stand Establishment ◽  
Yield And Quality

Water pumping restrictions of high-quality irrigation water from underground aquifers is affecting vegetable production in Southwest Texas. There is a need to develop efficient deficit-irrigation strategies to minimize irrigation inputs and maintain crop profitability. Our objective was to determine how growth, yield, and quality of cantaloupe (Cucumis melo L. cv. `Caravelle') are affected by irrigation systems with varying input levels, including drip depth position and polyethylene mulch. Stand establishment systems used were containerized transplants and direct seeding. Field experiments were conducted on a Uvalde silty clay loam soil. Marketable yields increased in the order of pre-irrigation followed by: dry-land conditions, furrow/no-mulch, furrow/mulch, drip-surface (0 cm depth)/mulch, drip-subsurface (10-cm depth)/mulch, and drip-subsurface (30 cm depth)/mulch. Pooled across all drip depth treatments, plants on drip had higher water use efficiency than plants on furrow/no-mulch or furrow/mulch systems. Transplants with drip-surface produced 75% higher total and fruit size No. 9 yields than drip-subsurface (10- or 30-cm depth) during the first harvest, but total yields were unaffected by drip tape position. About similar trends were measured in a subsequent study except for a significant irrigation system (stand establishment interaction for yield. Total yields were highest for transplants on drip-subsurface (10-cm depth) and direct seeded plants on drip-subsurface (10 and 30 cm depth) with mulch.

scholarly journals Effect of Fertilization with Urea and Inhibitors on Growth, Yield and CBD Concentration of Hemp (Cannabis sativa L.)

2021 ◽  
Vol 13 (4) ◽  
pp. 2157
Author(s):  
Ioanna Kakabouki ◽  
Angeliki Kousta ◽  
Antigolena Folina ◽  
Stella Karydogianni ◽  
Charikleia Zisi ◽  
...  
Keyword(s):  
Plant Height ◽  
Field Experiments ◽  
Cannabis Sativa ◽  
Nitrification Inhibitor ◽  
Growth Yield ◽  
Urease Inhibitor ◽  
Significance Level ◽  
Yield And Quality ◽  
Positive Effect ◽  
Urea Fertilization

Field experiments were conducted during 2019 in two different locations in Greece (Athens and Farsala) to evaluate the effect of urea and urea fertilization with inhibitors on the agronomic yield and quality characteristics of two cannabis varieties (Cannabis sativa L.), “Uso31”and “Fedora 17”. The experimental design was split-plot with four different fertilization treatments—control, Urea (U), urea with Urease Inhibitor (UI), and urea with Nitrification Inhibitor (NI) and urease inhibitor (UI). The significance of differences between treatments was estimated by using Tukey’s test with a significance level of p = 0.05. The plant height was significantly affected by the different fertilizations and different varieties as well as by the two locations. The maximum plant height was 197 cm for “Fedora 17”in Farsala. The seed yield was higher forthe urea with inhibitors treatment in both varieties. The Cannabidiol (CBD) content was significantly affected by the fertilization—it was higher in urea with inhibitors in “Uso31”and “Fedora 17” treatments. The lowest CBD content value was 1.29% (control) and the highest was 1.69% (urea NI + UI). In conclusion, in both varieties, it seems that urea with inhibitors has a positive effect on their growth, as well as on the increase in cannabidiol (CBD) content.

scholarly journals Plant spacing and pollen quantity on yield and quality of squash seeds

2003 ◽  
Vol 21 (3) ◽  
pp. 443-447 ◽  
Author(s):  
Márcio S. de Lima ◽  
Antonio I. I. Cardoso ◽  
Marcelo F. Verdial
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Block Design ◽  
Fruit Production ◽  
Plant Spacing ◽  
Plant Seed ◽  
Yield And Quality ◽  
Randomized Complete Block Design ◽  
Pollen Quantity

Squash seeds yield and quality can be improved by proper population plant spacing and the pollen quantity, which influences the pollination quality and fertilization. Nine experiments were conducted as a factorial combination of three spacing between plants (0.8 x 0.3, 0.8 x 0.6 and 0.8 x 0.9 m), two quantities of pollen (50% of an anther and another entire one) and natural insect pollination. Seed and fruit production parameters, and seed quality were evaluated. A randomized complete block design, five replications, with ten plants per plot was adopted. Larger plant spacing increased the average number of mature fruits and seed yield per plant. Seed yield was directly proportional to the amount of pollen used during pollination. Higher amounts of pollen resulted in higher seed yield per area, but the plant spacing did not affect this characteristic. Manual pollination, using a whole anther, did not differ from natural pollination in relation to seed yield and quality.

scholarly journals Foliar application of silicon and the effect on wheat seed yield and quality

2013 ◽  
Vol 35 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Samantha Rigo Segalin ◽  
Caroline Huth ◽  
Thais D'Avila Rosa ◽  
Diógenes Barella Pahins ◽  
Liliane Marcia Mertz ◽  
...  
Keyword(s):  
Seed Yield ◽  
Foliar Application ◽  
Accelerated Aging ◽  
Dry Weight ◽  
Wheat Cultivars ◽  
Wheat Seed ◽  
Germination Test ◽  
Yield And Quality ◽  
Physiological Quality

Adequate nutrients for plants are important for increasing the yield and quality of the seeds produced. The objective of this study was to evaluate foliar fertilization with silicon in wheat and its effect on seed yield and physiological quality. Treatments consisted of two silicon dosages (three and six liters silicon per hectare) and the control (no silicon) and five wheat cultivars: OR "Quartzo", OR "Ônix", Fundacep "Linhagem", Fundacep "Campo Real" and Fundacep "Horizonte". The experimental design was randomized blocks with four replications. After physiological maturity, harvesting and threshing of the seeds were done manually. Seed samples were evaluated for yield and physiological quality from the germination test, first germination count, seedling dry weight, accelerated aging, electrical conductivity, 1000 seeds and hectoliter weights. The results showed that the foliar application of silicon at the dosages tested did not affect the yield and physiological quality of the seeds produced by the wheat cultivars.

scholarly journals Economic and Horticultural Evaluation of Chemical and Mechanical Weed Control Strategies for Cowpea

1992 ◽  
Vol 117 (2) ◽  
pp. 255-259
Author(s):  
Brian A. Kahn ◽  
Raymond Joe Schatzer
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Control Strategies ◽  
Dry Weight ◽  
Farm Income ◽  
Control Chemical ◽  
Biological Yield ◽  
Cowpea Seed ◽  
Main Effects ◽  
Mechanical Weed Control

The herbicides paraquat, trifluralin, and metolachlor were compared for efficacy of weed control in cowpea [Vigna unguiculata (L.) Walp.] with and without cultivation as a supplemental strategy. Herbicides also were compared against a no cultivation-no herbicide treatment (control) and against cultivation without an herbicide. Cultivation had no significant effect on seed yield, biological yield, or harvest index of cowpea. Paraquat, applied before seeding but after emergence of weeds, was ineffective for weed control and usually did not change cowpea yield from that obtained without an herbicide. Trifluralin and metolachlor more than tripled cowpea seed yield compared with that obtained without an herbicide in 1988, when potential weed pressure was 886 g·m-2 (dry weight). The main effects of trifluralin and metolachlor were not significant for cowpea seed yield in 1989, when potential weed pressure was 319 g·m-2 (dry weight). However, in 1989, these two herbicides still increased cowpea seed yield compared with that of the control and increased net farm income by more than $300/ha compared with the income obtained from the control. Chemical names used 1,1'-dimethyl-4,4' -bipyridlnium salts (paraquat); 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl) benzenamine (trifluralin); 2-chloro-N-(2-ethyl-6 -methylphenyl)-N-(2-methoxy-l-methylethyl) acetamide (metolachlor).

scholarly journals Evaluation of Sesame Yield and Yield Component under Different NPS Fertilizer Rates in Western Tigray, Ethiopia

2020 ◽  
pp. 1-7
Author(s):  
Teame Shimgabr ◽  
Negasi Gebereslasie ◽  
Haile Alene ◽  
Welesenbet Haftu ◽  
Nebyu Tsegay
Keyword(s):  
Grain Yield ◽  
Seed Yield ◽  
Field Experiments ◽  
Growth Yield ◽  
Yield Component ◽  
Yield Attributes ◽  
Significant Difference ◽  
Fertilizer Rates ◽  
Different Levels ◽  
Number Of Branches

Field experiments were conducted in three sites of Western Tigray, Ethiopia. The experiments aimed at identifying optimum the rate of the newly introduced NPS fertilizer impact with different levels on growth, yield attributes, yield and economics of sesame in vertisols of Western Tigray at the Humera station, Banat and Kebabo Kafta Humera and Tsegede Wereda’s. The treatments consisted of six levels of NPS 0, 50, 100, 150, 200 and 250 kg ha-1 and one blanket recommendation N and P was applied. The experiment was laid out in an RCBD with three replications. Yield of Sesame and yield related components showed significant difference (p < 0.001) compared to control. Results showed that number of branches plant-1, length of pod bearing zone (cm), plant height (cm), number of capsules plant-1, seeds capsule-1 and seed yield was significant differences at (P< 0.001) Grain yield increases from 444.8 kg ha-1 to 671.9 kg ha-1 as NPS and 444.8 kg ha-1 to 628 kg ha-1 as NP increases from 0 (control) to 100 kg ha-1 NPS and 41 kg N and 46 kg P205 ha-1 respectively. But NPS was not significant with blanket recommendation of N and P (41 kg N and 46 kg P205 ha-1), therefore no need to replace the NP by NPS fertilizer in the study area.

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