Weed Management Methods Influence Growth of `Navaho' Blackberries

In Sept.1993, `Navaho' blackberries were planted in raised beds in a converted bermudagrass hay meadow. Tall fescue was planted between the beds. There are three plants per plot and nine replications with 1.3 m between plants, 3 m between plots, and 5 m between rows. Each row is one replication. The plots are 3 m wide and 3.9 m long. Weed management treatments were applied in a randomized complete-block design, and included: alfalfa (Medicago sativa) cover crop, rye (Secale cereale) cover crop, herbicide (simazine and oryzalin) and hoeing, mowing volunteer vegetation, and hardwood sawdust mulch 8 to 10 cm deep. In Spring 1994 and 1995, data were taken on weed populations in each of the plots. In early 1995, the blackberry plants were measured. Data taken included cane number, cane length, and cane diameter. Early results indicate that the best blackberry plant growth occurred when rows were maintained with no mulch or vegetation by application of herbicides and hoeing. However, these plots sustained significant soil erosion, which may result in decreased plant productivity over time.

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PSXI-19 Impact of toxic-infected tall fescue renovation strategies on second-year hay yield, botanical composition, and nutritive value

Journal of Animal Science ◽

10.1093/jas/skab235.633 ◽

2021 ◽

Vol 99 (Supplement_3) ◽

pp. 344-345

Author(s):

Charlotte L Talbott ◽

Deidre D Harmon ◽

Matt H Poore ◽

Alan J Franluebbers ◽

Carolyn A Young ◽

...

Keyword(s):

Beef Cattle ◽

Tall Fescue ◽

Cover Crop ◽

Nutritive Value ◽

Block Design ◽

Forage Yield ◽

Agronomic Performance ◽

Botanical Composition ◽

Randomized Complete Block Design ◽

Second Year

Abstract Renovating toxic-infected tall fescue (Lolium arundinaceum) (TF) pastures to novel endophyte tall fescue (NE) is a solution to mitigate the negative associated effects of toxic fescue in beef cattle. However, beef cattle producers are uncertain of the payback period for costs associated with renovation techniques in terms of farm profitability and agronomic performance. In 2018, three renovation strategies were implemented in a randomized complete block design in Bahama, NC. Strategies included: 1) control (C), 2) renovation to NE after one season of a single specie cover crop (1-SM), 3) renovation to NE after three seasons of a single specie cover crop (3-SM), and 4) renovation to NE after three seasons of a multi-specie cover crop (3-CM). Each treatment plot (0.81 ha) was evaluated for botanical composition and hay was harvested in May and August of 2020. Round bales from each treatment were weighed to determine yield and core sampled to determine nutritive value. Data were analyzed using proc GLIMMIX of SAS v9.4. Combined forage yield was greater (P = 0.0226) for 3-CM (8,816 kg/ha) compared to 3-SM (7,191 kg/ha) and C (6,920 kg/ha), but did not differ from 1-SM (7,775 kg/ha). Crude protein concentration was greater (P = 0.035) for C (10.2%) in comparison to 3-SM (9.35%) in harvest 1, but was not different (P = 0.93) in harvest 2. Percentage of fescue in the sward was greatest (P = 0.0002) for 3-SM and least for C (84.9 and 62%, respectively). Similarly, presence of undesirable plants was greater (P < 0.0001) for C (37.5%) than 1-SM, 3-CM and 3-SM (23.7, 15.2 and 12.7%, respectively). Percentage of bare ground did not differ among treatments (P = 0.31). Data suggest agronomic performance for 3-CM and 3-SM was improved compared to C in years following pasture renovation.

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Physiological attributes of mungbean (Vigna radiata L.) influenced by different sources of nutrients (NPK) in Madhupur tract region of Bangladesh

Journal of Science Technology and Environment Informatics ◽

10.18801/jstei.110121.74 ◽

2021 ◽

Vol 11 (01) ◽

pp. 736-748

Author(s):

M. M. Hossain ◽

◽

S. Yesmin ◽

M. Z. Islam ◽

M. A. Hossain ◽

...

Keyword(s):

Plant Growth ◽

Seed Yield ◽

Block Design ◽

Growth And Yield ◽

Higher Plant ◽

Npk Fertilizers ◽

Straw Yield ◽

Combined Application ◽

Randomized Complete Block Design ◽

Different Sources

An experiment was conducted at the Sher-e-Bangla Agricultural University farm from April to June 2017 in Kharif season to evaluate the performance of two mungbean varieties under different NPK fertilizers doses in field conditions. The experiment was laid out in Randomized Complete Block Design (RCBD), comprising six treatments with three replications. In the experiment, varieties used were BARI mung-6 and BARI mung-5 and the combination of the treatment were T0 = (control), T1 (10-40-25 NPK kg ha-1), T2 (10-60-45 NPK kg ha-1), T3 (20-50-35 NPK kg ha-1), T4 (30-40-25 NPK kg ha-1) and T5 (30-40-45 NPK kg ha-1), respectively. Mungbean cultivars responded noticeably to the supplementary NPK fertilizers as the crop characters were significantly influenced by different levels of NPK fertilizers. Data were recorded on plant height, leaves plant-1, branches plant-1, pods plant-1, seeds pod-1, 1000-seed weight, seed, and straw yield at different days after sowing. Of the two varieties, BARI mung-6 gave the highest seed yield (1.72 t ha-1) next to the higher plant growth and straw yield On the contrary, BARI mung-5 cultivar produced the lowest seed yield (1.57t ha-1), plant growth, and straw yield. The results showed that T3 (20-50-35 NPK kg ha-1) treatment was the best treatment as regards plant growth and yield parameters. The highest seed yield was produced by treated plot T3 (20-50-35 NPK kg ha-1) over the untreated control plot, T1, T2, T4, and T5, respectively. As for the combined effect, V1T3 (BARI mung-6 and T3 = 20kg N + 50kg P + 35kg K ha-1) performed the best results in all growth and development characters. Therefore, the combined application of 20-50-35 kg NPK ha-1 might be considered to be found optimal to get a considerable seed yield of mungbean variety BARI mung-6.

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Growth, mineral composition, fruit yield, and mycorrhizal colonization of feijoa in response to lime and phosphorus application

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2016000800006 ◽

2016 ◽

Vol 51 (8) ◽

pp. 942-949 ◽

Cited By ~ 1

Author(s):

Gilberto Nava ◽

Karine Louise dos Santos ◽

Murilo Dalla Costa ◽

Marlise Nara Ciotta

Keyword(s):

Plant Growth ◽

Mineral Composition ◽

Block Design ◽

Mycorrhizal Colonization ◽

Fruit Yield ◽

Tree Canopy ◽

Phosphorus Fertilization ◽

Randomized Complete Block Design ◽

Acca Sellowiana ◽

Phosphorus Application

Abstract: The objective of this work was to investigate the effect of liming and phosphorus fertilization on the growth, mineral composition of the leaves, fruit yield, and mycorrhizal colonization of young feijoa (Acca sellowiana) plants. Treatments consisted of four liming levels - 0, 25, 50, and 100% of the dose required to raise the soil pH to 6.5 - and of five levels of P - 0, 60, 120, 180, and 240 kg ha-1 P2O5 -, placed in a randomized complete block design, in a split-plot arrangement, with three replicates. The orchard was established in 2010 with the Helena cultivar. In 2012, 2013, and 2014, plant growth was evaluated by measuring trunk perimeter, plant height, and tree canopy width. Mineral composition of the leaves, regarding P, N, K, Ca, and Mg contents, was assessed annually. Mycorrhizal colonization was evaluated in 2012, and fruit yield was determined in 2014. No interaction was observed between the studied factors. P contents had no effect on the evaluated variables. Liming, however, increases plant growth, mycorrhizal colonization, fruit yield, and Ca and Mg leaf contents, besides reducing K leaf contents.

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EFFECT OF TRINEXAPAC-ETHYL ON GROWTH AND YIELD OF SUGARCANE

Planta Daninha ◽

10.1590/s0100-83582015000300011 ◽

2015 ◽

Vol 33 (3) ◽

pp. 491-497

Author(s):

A. T. FARIA ◽

E. A. FERREIRA ◽

P. R. R. ROCHA ◽

D. V. SILVA ◽

A. A. SILVA ◽

...

Keyword(s):

Plant Growth ◽

Growth Regulators ◽

Plant Growth Regulator ◽

Block Design ◽

Growth And Yield ◽

Bud Burst ◽

Root Volume ◽

Factor B ◽

Randomized Complete Block Design ◽

Sugarcane Yield

ABSTRACT Growth regulators can be used to further retard or inhibit vegetative growth. In this sense, the objective of this study was to determine the effects of age and number of trinexapac-ethyl applications on the growth and yield of sugarcane. The experiment was in a randomized complete block design with four replications. The treatments were in a 3 x 2 + 2 factorial arrangement, where factor A corresponded to the application times of the plant growth regulator (120, 200 and 240 days after bud burst (DAB) of sugarcane) and factor B to the number of applications (one or two applications). In addition, two controls (one with three applications and another application without the regulator) were added. The application of trinexapac-ethyl decreased the number and the distance between buds, height, root volume and sugarcane yield. The sequential application (2 or 3 times) induced an increase in stem diameter and three applications of the product increased the number of plant tillers. The use of growth regulators applied at 240 DAB has reduced plant height, however without changing the number of buds. It can be concluded that trinexapac-ethyl changes sugarcane growth and yield, regardless of season and number of applications.

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Comparison between conventional and organic weed management: growth and yield of leek (Allium porrum L.)

Horticultural Science ◽

10.17221/162/2011-hortsci ◽

2012 ◽

Vol 39 (No. 2) ◽

pp. 81-88 ◽

Cited By ~ 1

Author(s):

A. Karkanis ◽

D. Bilalis ◽

A. Efthimiadou ◽

N. Katsenios

Keyword(s):

Weed Management ◽

Block Design ◽

Growth And Yield ◽

Barley Straw ◽

Allium Porrum ◽

White Spots ◽

Randomized Complete Block Design ◽

Weak Competitor ◽

Common Purslane ◽

Organic Weed Management

Leek is a weak competitor against weeds. A field experiment was conducted to determine the effects of herbicides and mulching on weed flora, growth and yield of a leek crop. A randomized complete block design was employed with five replicates per treatment (control, mulching with barley straw, post-transplant application of the herbicide oxyfluorfen at 360 g a.i./ha and pre-transplant application of pendimethalin at 1,650 g a.i./ha). The order of weed sensitivity to mulches was black nightshade (72–85%), venice mallow (80%) > redroot pigweed (70–74%), barnyardgrass (67–77%) > jimsonweed (65%) > common purslane (42–45%). Oxyfluorfen had the highest control of jimsonweed, venice mallow and common purslane. There were no significant effects of the pendimethalin treatment on weed control ratings of jimsonweed, venice mallow and field bindweed. Injury symptoms (small white spots) appeared on leek leaves exposed to oxyfluorfen. The highest yield of leek was recorded with the oxyfluorfen application. Our results indicate that mulching and oxyfluorfen application provides satisfactory control of weeds. The use of mulching is an option for the weed management in organic leek crop.

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Post-emergence selectivity of metribuzin to carrot

Revista CERES ◽

10.1590/0034-737x201865040003 ◽

2018 ◽

Vol 65 (4) ◽

pp. 314-320

Author(s):

Núbia Maria Correia ◽

Agnaldo Donizete Ferreira de Carvalho

Keyword(s):

Plant Growth ◽

Chemical Treatment ◽

Growth Stage ◽

Block Design ◽

Greenhouse Experiment ◽

Application Time ◽

Application Timing ◽

Time Of Application ◽

Randomized Complete Block Design ◽

Two Stages

ABSTRACT When selecting a weed chemical treatment (herbicide, product mixtures, dose, or application timing), an important issue to consider is its selectivity to the crop of commercial interest. The objective of this study was to evaluate the selectivity of the herbicide metribuzin to carrot plants as a function of genotype, dose, and plant growth stage at the time of application. Two experiments were carried out, one in a greenhouse and another in the field. The greenhouse experiment was arranged in a completely randomized, 5 x 2 x 3 factorial design, with four replications. Metribuzin doses (0, 72, 96, 144, and 192 g ha-1) were sprayed on plants with 2-3 and 4-5 true leaves of the cultivars Maestro, BRS Planalto, and Verano. Cultivar Maestro was cultivated in the field in a 2 x 5 factorial experiment in randomized complete block design, with four replications. Carrot plants, at two stages of development (2 and 5 true leaves), were sprayed with the same doses of metribuzin applied in the greenhouse experiment. Metribuzin, regardless of application time and dose tested, was selective for cultivars BRS Planalto and Verano (greenhouse) and Maestro (both greenhouse and field), without reduction in quality and yield of roots.

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Effectiveness of different weed control practices in onion (Allium cepa L.) crop

Journal of Horticultural Science & Technology ◽

10.46653/jhst20030247 ◽

2020 ◽

pp. 47-51

Author(s):

Muhammad Nafees ◽

Ishtiaq Ahmad ◽

Maryam ◽

Muhammad Ahsan ◽

Muhammad Rashid Shaheen ◽

...

Keyword(s):

Plant Height ◽

Weed Control ◽

Allium Cepa ◽

Weed Management ◽

Block Design ◽

Yield Reduction ◽

Weed Biomass ◽

Allium Cepa L ◽

Randomized Complete Block Design ◽

Number Of Leaves

Onion (Allium cepa L.) is one of the most important vegetables in family Alliaceae, which is cultivated worldwide. In onion, weeds are among one of the major concerns which cause its yield reduction. The present study was designed to assess the effectiveness of different methods for weed control in onion. In this study, five treatments were selected including control, black polythene mulch sheet, white polythene mulch sheet, Dual Gold spray @ 9.0 mL L-1 and Preact spray @ 7.5 mL L-1 to control weeds. The weedicides were applied as pre-emergence sprays before transplanting the seedlings. The experiment was laid out in Randomized Complete Block Design with three replications. From the results, it was concluded that there were significant differences among the studied weed control treatments. Among the five treatments, greater plant height (33.0 cm), number of leaves per plant (8), bulb diameter (4.7 cm) and bulb weight (73 g) were observed in the ridges covered with black mulch sheet. However, the minimum weed biomass (fresh and dry) was recorded in black mulch sheet and Preact pre-emergence weedicide spray (140 and 80 g in both). Thus, black polythene sheet as mulching material was found better option for weed management in onion fields.

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DESEMPENHO DE Lactuca sativa (ALFACE) DIANTE DO AUMENTO DA DENSIDADE DE CULTIVOS CONSORCIADOS EM HORTAS AGROFLORESTAIS

InterEspaço Revista de Geografia e Interdisciplinaridade ◽

10.18764/2446-6549.e202033 ◽

2020 ◽

Vol 5 (19) ◽

pp. 202033

Author(s):

Aruana Vargas Couto ◽

Arcângelo Loss ◽

Giorgini Augusto Venturieri

Keyword(s):

Experimental Design ◽

Lactuca Sativa ◽

Dry Matter ◽

Block Design ◽

Planting Density ◽

Species Succession ◽

De Se ◽

Randomized Complete Block Design ◽

Regulation Services ◽

Over Time

Lactuca sativa (ALFACE) PERFORMANCE DURING INCREASE IN THE DENSITY OF INTERCROPPED IN AGROFOREST GARDENSRENDIMIENTO DE Lactuca sativa (ALFACE) DURANTE EL AUMENTO DE LA DENSIDAD DE LOS CULTIVOS INTERCALADOS EN LOS JARDINES AGROFORESTALESRESUMOFoi realizado um experimento para verificar se a consorciação de um número crescente de cultivos olerícolas, escolhidos de acordo com a lógica da sucessão de espécies no espaço ao longo do tempo, afetaria a produção de matéria seca de Lactuca sativa (alface) em hortas agroflorestais. O delineamento experimental foi em delineamento em blocos casualizados, com um fator em três níveis, e quatro repetições. A eficiência dos consórcios foi estimada pela matéria seca de L. sativa. Os resultados mostraram que o aumento do número de espécies consorciadas e consequente densidade de plantio não influenciou o parâmetro avaliado. Isto evidencia uma vantagem cultural conferida pelos consórcios sucessionais testados, uma vez que foram conduzidos sem a aplicação de insumos sintéticos e tóxicos, além de se obter uma produção de alimentos de qualidade diferenciada dos convencionais e prestar serviços ecossistêmicos de regulação. Não houve perdas produtivas para L. sativa decorrentes do adensamento dos cultivos.Palavras-chave: Agrofloresta; Sucessão Ecológica; Agricultura Sintrópica.ABSTRACTAn experiment was carried out to verify if the intercropping of a growing number of vegetables, chosen according to the logic of species succession over time, would affect the production of dry matter of Lactuca sativa (lettuce) in agroforestry gardens. The experimental design was a randomized complete block design with one factor at three levels and four replications. Consortium efficiency was estimated by L. sativa dry matter. The results showed that the increase of the number of intercropping species and consequent planting density did not influence the evaluated parameter. This evidences a cultural advantage conferred by the successional consortiums tested, since without the application of synthetic and toxic inputs, besides obtaining a production of quality differentiated of food conventional and providing ecosystem regulation services. There were no productive losses for L. sativa due to the densification of crops.Keywords: Agroforestry; Ecological Succession; Syntropic Agriculture.RESUMENSe llevó a cabo un experimento para verificar si el cultivo intercalado de un número creciente de verduras, elegidos de acuerdo con la lógica de sucesión de especies a lo largo del tiempo, afectaría la producción de materia seca de Lactuca sativa (lechuga) en jardines agroforestales. El diseño experimental fue un diseño de bloques completos al azar con un factor en tres niveles y cuatro repeticiones. La eficiencia del consorcio fue estimada por la materia seca de L. sativa. Los resultados mostraron que el aumento del número de especies intercaladas y la consiguiente densidad de siembra no influyeron en el parámetro evaluado. Esto evidencia una ventaja cultural conferida por los consorcios sucesionales probados, ya que se realizaron sin la aplicación de insumos sintéticos y tóxicos, además obtener producción de alimentos de calidad diferenciada de los convencionales y la prestación de servicios de regulación del ecosistema. No hubo pérdidas productivas para L. sativa debido a la densificación de los cultivos.Palabras clave: Agroforestería; Sucesión Ecológica; Agricultura sintrópica.

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SOURGRASS INTERFERENCE ON SOYBEAN GROWN IN BRAZILIAN CERRADO

Revista Caatinga ◽

10.1590/1983-21252021v34n211rc ◽

2021 ◽

Vol 34 (2) ◽

pp. 350-358

Author(s):

GUILHERME BRAGA PEREIRA BRAZ ◽

ALINE GUIMARÃES CRUVINEL ◽

ALAN BRUNO CANEPPELE ◽

HUDSON KAGUEYAMA TAKANO ◽

ALESSANDRO GUERRA DA SILVA ◽

...

Keyword(s):

Plant Growth ◽

Growth Stage ◽

Field Experiments ◽

Production Systems ◽

Block Design ◽

Brazilian Cerrado ◽

Yield Losses ◽

Soybean Yield ◽

The Third ◽

Randomized Complete Block Design

ABSTRACT Sourgrass (Digitaria insularis) is one of the main species causing significant losses in Brazilian soybean production systems. Thus, this paper aimed to evaluate sourgrass interference on soybeans grown under Cerrado conditions. Three field experiments were conducted, of which the first two (E1 and E2) simulated sourgrass after pre-sowing burndown, using plants already emerged by the time soybeans were sown; whereas the third (E3) simulated both sourgrass and soybeans emerged simultaneously. Both E1 and E2 were conducted in a randomized complete block design (RCBD) with five treatments based on sourgrass infestation densities (0, 2, 4, 6, and 8 plants m-2) and four replications. In turn, E3 was also carried out in an RCBD but with treatments arranged in a 2 x 5 factorial and four replications. The first factor comprised two soybean cultivars, while the second was sourgrass density levels, just as in E1 and E2. The results showed that increasing sourgrass densities reduced soybean yield regardless of the plant growth stage when the crop was sown. Yield losses were higher when sourgrass plants were already established by the time soybean was sown. Soybean yield losses reached up to 80% under higher sourgrass infestation levels.

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Seedling Growth Analysis of Papaya Cultivated on Several Planting Media Enriched by Plant Growth Promotor Microbes

Caraka Tani Journal of Sustainable Agriculture ◽

10.20961/carakatani.v36i2.46882 ◽

2021 ◽

Vol 36 (2) ◽

pp. 283

Author(s):

Dewi Fatria ◽

Andre Sparta ◽

Deni Emilda ◽

Bambang Hariyanto ◽

Tri Budiyanti ◽

...

Keyword(s):

Plant Growth ◽

Seedling Growth ◽

Growth Analysis ◽

Block Design ◽

Medium Composition ◽

Media Composition ◽

Tropical Fruit ◽

Experimental Station ◽

Randomized Complete Block Design ◽

Number Of Leaves

There are factors contributed to the growth and development of fruit crop seedling. Microbes are well known as plant growth promotors such as symbiotic mycorrhizae and antagonist fungi, Trichoderma spp. The main objective of this experiment is to find out the best medium composition enriched by beneficial microbes to improve papaya seedling growth. The experiment was conducted at Sumani Experimental Station, Indonesian Tropical Fruit Research Institute, Solok, West Sumatera, Indonesia from August until December 2017. The experiment was arranged in a Randomized Complete Block Design with ten treatments and three replicate blocks. The treatments were ten combinations of media for papaya seedling growth enriched by plant growth promotor microbes. In this experiment, medium soil with additional manure, rice husk charcoal and compost (single or combination) combined with mycorrhizae were used. Also, the effect of Trichoderma sp. enrichment into media composition were tested in this experiment. Treatments SCRMc and SCRMcT; with its complexity; were the best media composition to promote papaya seedling growth. These treatments resulted in best performance of plant height, stem diameter and number of leaves of papaya seedlings. The additional of Trichoderma sp. into medium did not show beneficial effect for all parameters in this experiment.

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