Initial Crown Diameter of Strawberry Bare-root Transplants Affects Early and Total Fruit Yield

The standard strawberry (Fragaria ×ananassa) production system in Florida uses bare-root transplants with three to five leaves; however, commercial transplants are typically variable in size. The objective of this experiment was to study the effects of transplant crown diameter on the subsequent performance of three short-day strawberry cultivars under central Florida conditions. Trials were carried out during the 2012–13 and 2013–14 growing seasons with six treatments resulting from the combination of three cultivars and two crown diameter categories. Transplants of ‘Florida Radiance’, ‘Strawberry Festival’, and WinterStar™ were sorted into two initial crown diameter size ranges: <10 mm and >10 mm. Treatments were established in a split-plot design with cultivars as the main plot and four replications. Dry plant biomass was collected at 6 weeks after transplant (WAT). Canopy diameter and crown diameter were measured at 6 and 18 WAT and fruit harvest started at 8 WAT. There were no interactions between cultivar and initial crown diameter for any of the measured variables. For early yield, larger crowns led to 46% (3.5 Mg·ha−1) and 38% (3.9 Mg·ha−1) higher early yield than smaller crowns in 2012–13 and 2013–14, respectively. Crown diameters >10 mm also resulted in 18% (23.5 Mg·ha−1) and 27% (17.4 Mg·ha−1) higher total yields in 2012–13 and 2013–14, respectively.

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Respon Padi Gogo Terhadap Residu Pupuk Organik

Agrotek ◽

10.30862/agt.v3i2.566 ◽

2018 ◽

Vol 3 (2) ◽

Author(s):

Baso Daeng

Keyword(s):

Environmental Sustainability ◽

Upland Rice ◽

Organic Fertilizer ◽

Growing Season ◽

Chicken Manure ◽

Good Effect ◽

Best Response ◽

Different Types ◽

Main Plot ◽

Plot Design

The rate of conversion of paddy fields and irrigation water crisis suggest to consider the development of upland rice.� Empowerment of organic-based dryland done to increase rice, as well as environmental sustainability efforts.� The purpose of this experiment was to determine the effect of organic fertilizer residue to upland rice in the second growing season.� Experiments using a split-split plot design.� The main plot consisted of a dosage of 50% and 100% organic fertilizer in the first growing season.� Sub plot consisted of chicken manure (20 tons ha-1), Centrosema� pubescens (4.3 tons ha-1) + chicken manure (10 tons ha-1), and Thitonia diversifolia (4.3 tons ha-1) + chicken manure (10 tons ha-1).� Sub-sub plot consist of Danau Gaung and Batu Tegi varieties.� The different types of fertilizer had no effect on plant productivity.� The addition of Thitonia diversifolia gave a good effect on some growth variable and its resistance due pathogen attack.� Batu Tegi varieties are varieties that give the best response from an organic fertilizer.� Interaction between dosage, type of fertilizer, and varieties do not provide areal impact.

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Effect of varieties and weeding regimes on weed and performance of

South Asian Journal of Experimental Biology ◽

10.38150/sajeb.1(3).p121-130 ◽

2011 ◽

Vol 1 (3) ◽

pp. 121-130

Author(s):

U. Ismaila ◽

M. G. Kolo ◽

A. U. Gbanguba

Keyword(s):

Oryza Sativa ◽

Active Ingredient ◽

Oryza Sativa L ◽

Weed Suppression ◽

Dichlorophenoxyacetic Acid ◽

Aerobic Rice ◽

Split Plot ◽

Main Plot ◽

And Performance ◽

Plot Design

A Field trial was conducted at the aerobic rice experimental field of the NationalCereals Research Institute (NCRI), Badeggi, Nigeria (9 ° 04 N and 6° 7 E)in 2007 and 2008 wet seasons to determine the weed competitiveness andperformance of inter Ã¢â‚¬Â and intraÃ¢â‚¬Âspecific aerobic rice (Oryza sativa L.) varietiesunder seven weeding regimes. The trial was laid out in a split plot designwith the two varieties of rice (NERICA 1 as inter Ã¢â‚¬Âspecific and FARO 46 asintra Ã¢â‚¬Âspecific) assigned to the main plot while seven weeding regimes (hoeweeding at 25, 45, and 65 days after sowing (DAS), 25 DAS, 45 DAS, 25 and45 DAS, application of 3’,3’ Ã¢â‚¬Â dichloropropionanilide /2, 4 – Dichlorophenoxyacetic acid (orizo plus R) by Candel Company Ltd. at 3.5 kg active ingredient(ai )ha Ã¢â‚¬Â1 at 25 DAS, hoe weeding at 25 DAS followed by orizo plus at 3.5 kg aiat 45 DAS and weedy check) constituted the sub – plots. The treatmentswere replicated three times in a split plot design. From the results, interspecificvariety (NERICA1) had better weed suppression ability with highergrain yield of 3.1 t ha Ã¢â‚¬Â1 than the intraÃ¢â‚¬Âspecific variety (FARO 46). Weed controlwas better when hoe weeding was done at 25, 45 and 65 DAS or 25 and45 DAS and at 25 DAS followed by orizo plus at 45 DAS than in other treatments.However, hoe weeding at 25, 45 and 65 DAS gave significantlygreater grain yield than other treatments. Although economic yield was obtainedfrom hoe weeding at 25 DAS followed by orizo plus at 45 DAS.

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Allelopathy and Allelochemicals of Eragrostis plana (Poaceae) and its Relation with Phenology and Nitrogen Fertilization

Planta Daninha ◽

10.1590/s0100-83582017350100028 ◽

2017 ◽

Vol 35 (0) ◽

Cited By ~ 3

Author(s):

K. CECCHIN ◽

A. FAVARETTO ◽

S.M. SCHEFFER-BASSO ◽

C.D. BERTOL ◽

S.O. CHINI

Keyword(s):

Nitrogen Fertilization ◽

High Performance ◽

Phenological Stage ◽

Flowering Stage ◽

Chromatography Analysis ◽

Allelopathic Activity ◽

Aerial Parts ◽

Main Plot ◽

Chemical Attributes ◽

Plot Design

ABSTRACT This study was conducted in order to verify if the phenological stage and the nitrogen fertilization interfere in the allelopathic activity and in the concentration of potentially allelopathic phenolic compounds of tough lovegrass (Eragrostis plana). The assay consisted of a bifactor 3 (0.100 and 200 kg N ha-1) x 2 (harvested in vegetative and reproductive stages), in a split plot design. The N doses constituted the main plot and the phenological stage during the harvest the subplots, resulting in six treatments. The tough lovegrass plants derived from each of the treatments were subjected to allelopathy bioassays, in which aqueous extracts of the aerial parts were applied to lettuce cypselae (Lactuca sativa) and to phytochemicals tests when ethanolic extracts were used, with subsequent partition with ethyl acetate, followed by a high-performance liquid chromatography analysis. There was nitrogen x phenological stage interaction on biological and chemical attributes. The allelopathic extracts were, in descending order of inhibition of germination, those from plants harvested at the vegetative stage and fertilized with 100 kg N and at the flowering stage with 200 kg N, which showed the highest catechin concentrations. The caffeic, ferulic, p-coumaric and vanillic acids were in a higher concentration in flowered and fertilized plants with 0 or 200 kg N. The management of the nitrogen fertilization and the harvesting age influence the allelopathic activity and the phytochemical composition of tough lovegrass.

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Influence of Insecticides and Reflective Mulch on Watermelon Vine Decline Caused by Squash vein yellowing virus (SqVYV)

Plant Health Progress ◽

10.1094/php-rs-14-0040 ◽

2015 ◽

Vol 16 (1) ◽

pp. 43-49 ◽

Cited By ~ 1

Author(s):

Chandrasekar S. Kousik ◽

Scott Adkins ◽

Craig G. Webster ◽

William W. Turechek ◽

Philip Stansly ◽

...

Keyword(s):

Fruit Quality ◽

Significant Interaction ◽

Limiting Factor ◽

Plastic Mulch ◽

Central Florida ◽

Chemical Treatments ◽

The Past ◽

Growing Seasons ◽

Vine Decline ◽

Yellowing Virus

Watermelon vine decline (WVD) caused by the whitefly-transmitted Squash vein yellowing virus (SqVYV) has been a serious limiting factor in watermelon production in southwest and west-central Florida over the past few years. Symptoms of WVD typically appear as sudden decline of vines a few weeks before harvest or just after the first harvest. Fruit symptoms include rind necrosis and flesh discoloration that affects fruit quality and marketability. The combination of insecticide treatments consisting of an imidacloprid drench (Admire Pro, 560 ml/ha) at transplanting followed by two foliar applications of spiromesifen (Oberon, 2SC, 490 ml/ha) and reflective plastic mulch was evaluated for management of WVD during fall growing seasons of 2006, 2007, and 2009. Virus inoculum source was introduced by planting SqVYV-infected squash plants at the ends of each plot. In all three experiments, the insecticide-treated plots had significantly lower levels of WVD on foliage and fruit compared to non-treated plots. In 2007, the reflective plastic mulch was effective in reducing foliar WVD compared to non-reflective mulch, but not in 2006 and 2009. No significant interaction between plastic mulch and chemical treatments was observed on WVD development on foliage or fruit. Our results suggest that application of insecticides for managing whiteflies can help manage SqVYV-caused WVD. Accepted for publication 13 January 2015. Published 25 March 2015.

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Responses of quinoa (Chenopodium quinoa Willd.) seeds stored under different germination temperatures

Acta Scientiarum Agronomy ◽

10.4025/actasciagron.v39i1.30989 ◽

2017 ◽

Vol 39 (1) ◽

pp. 83 ◽

Cited By ~ 5

Author(s):

Andressa Strenske ◽

Edmar Soares de Vasconcelos ◽

Vanessa Aline Egewarth ◽

Neusa Francisca Michelon Herzog ◽

Marlene De Matos Malavasi

Keyword(s):

Room Temperature ◽

Storage Time ◽

Chenopodium Quinoa ◽

Seed Vigor ◽

Continuous Darkness ◽

Experimental Conditions ◽

Growing Seasons ◽

Germinating Seeds ◽

Germinated Seeds ◽

Plot Design

In this experiment, we assessed the germination and vigor of quinoa seeds packed in paper bags and stored at room temperature for 36, 85, 119, 146, 177 and 270 days. The seeds were harvested under experimental conditions in Marechal Candido Rondon, Paraná, during the 2012/13 growing seasons. Four replicates of 100 seeds each were established for each storage time, and the seeds were evaluated, on paper, based on the BOD under the following experimental temperature conditions: alternating temperatures of 20 and 30°C and a constant temperature of 25°C. The seeds from both treatments were subject to seven-hour photoperiods and 25°C under continuous darkness. The germinated seeds were counted daily for eight days after sowing, and we evaluated the percentages of normal and abnormal seedlings and the germination index. The experimental design was completely randomized using a split-plot design. Increasing the storage time decreased the percentage of germinated seeds and seed vigor due to the increased number of abnormal seedlings. Over the 430-day study period, quinoa seed germination completely declined under the experimental conditions. The final number of germinating seeds should be evaluated 7 days after the beginning of the germination test.

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Response of Two Chickpea (Cicer arietinum L.) Varieties to Rates of Blended Fertilizer and Row Spacing at Tselemti District, Northern Ethiopia

Advances in Agriculture ◽

10.1155/2018/5085163 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8

Author(s):

Tesfahun Mekuanint ◽

Yemane Tsehaye ◽

Yemane G. Egziabher

Keyword(s):

Yield Components ◽

Agronomic Traits ◽

Row Spacing ◽

Northern Ethiopia ◽

Cicer Arietinum L ◽

Significant Difference ◽

Main Effect ◽

Main Plot ◽

Fertilizer Rates ◽

Plot Design

Effects of row spacing, blended fertilizer rates, and varieties on some agronomic traits of chickpea were evaluated with the objective of investigating response of Kabuli and Desi type chick pea varieties to blended fertilizers rates and interrow spacing. The study was done using split plot design interrow spacing as a main plot, and fertilizer and variety as a subplot, where three row spacings (20 cm, 30 cm, and 40 cm) were assigned to the main plot while the factorial combination of four blended (NPSB) fertilizer rates (0 kg/ha, 50 kg/ha, 100 kg/ha, and 150 kg/ha) and representative of Kabuli and Desi type chickpea varieties such as Arerti and Mariye, respectively, were assigned to the subplot. Main effect of interrow spacing did not show significant difference on many studied agronomic parameters. Similarly, main effect of blended fertilizer rates and varieties did not reveal a significant difference for the studied parameters. However, significant differences were obtained on phenology, yield components, and yield for the varieties. Blended fertilizer rates utilized in Tselemti District did not show differences in most of studied traits. Reasonable row spacing of 20 cm for both types of chickpea could be used for the studied area.

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Responses of carbon dioxide flux and plant biomass to water table drawdown in a treed peatland in northern Alberta: a climate change perspective

Biogeosciences ◽

10.5194/bg-11-807-2014 ◽

2014 ◽

Vol 11 (3) ◽

pp. 807-820 ◽

Cited By ~ 40

Author(s):

T. M. Munir ◽

B. Xu ◽

M. Perkins ◽

M. Strack

Keyword(s):

Climate Change ◽

Water Table ◽

Plant Biomass ◽

Carbon Dioxide Flux ◽

Control Site ◽

Change Scenario ◽

Vegetation Growth ◽

Growing Seasons ◽

C Stocks ◽

Incremental Growth

Abstract. Northern peatland ecosystems represent large carbon (C) stocks that are susceptible to changes such as accelerated mineralization due to water table lowering expected under a climate change scenario. During the growing seasons (1 May to 31 October) of 2011 and 2012 we monitored CO2 fluxes and plant biomass along a microtopographic gradient (hummocks-hollows) in an undisturbed dry continental boreal treed bog (control) and a nearby site that was drained (drained) in 2001. Ten years of drainage in the bog significantly increased coverage of shrubs at hummocks and lichens at hollows. Considering measured hummock coverage and including tree incremental growth, we estimate that the control site was a sink of −92 in 2011 and −70 g C m−2 in 2012, while the drained site was a source of 27 and 23 g C m−2 over the same years. We infer that, drainage-induced changes in vegetation growth led to increased biomass to counteract a portion of soil carbon losses. These results suggest that spatial variability (microtopography) and changes in vegetation community in boreal peatlands will affect how these ecosystems respond to lowered water table potentially induced by climate change.

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EFEKTIFITAS FUNGI MIKORIZA ARBUSKULA (FMA) SERTA PUPUK NITROGEN DAN FOSFAT TERHADAP PERTUMBUHAN SEMAI JABON (Anthocephallus cadamba Roxb.) Effectiveness of Arbuscula Mycorrhizal Fungi (AMF) Nitrogen and Phosphate Fertilizer toward Jabon ........

Journal of Tropical Silviculture ◽

10.29244/j-siltrop.8.1.20-25 ◽

2017 ◽

Vol 8 (1) ◽

pp. 20-25

Author(s):

Fransisca Yosina Regina Luturmas ◽

Sri Wilarso Budi R. ◽

Irdika Mansur

Keyword(s):

Plant Height ◽

Mycorrhizal Fungi ◽

Dry Weight ◽

Phosphate Fertilizer ◽

Soil Types ◽

Shoot Dry Weight ◽

Main Plot ◽

Fast Growing Species ◽

Glomus Sp ◽

Plot Design

Jabon (Anthocephallus cadamba Roxb.) is one of fast-growing species with high economical value, and well adapted on some of soil types. The aims of this research were to analyze the effectiveness of AMF species isolated from Samama (Anthocephallus macrophyllus (Roxb.) Havil) and to determine the favorable dose of nitrogen and phosphate fertilizer for Jabon growth. The research was conducted CRD-split plot design main plot was Acaulospora sp.1 (M1), Glomus sp.1 (M2), Acaulospora sp.2 (M3), Acaulospora sp.3 (M4), Glomus sp.2 (M5). While the fertilizer as the sub-plot, consist of control (P0), urea 0.5g+rockphosphat 2g (P1), urea 1g+rockphosphat 4g (P2). The result showed that AMF and fertilizer applications effectively improved Jabon grown, especially in height, stem diameter, and shoot dry weight. The interaction (M4P1) increased plant height 154.73%, diameter 75.38% and shoot dry weight 376.09% compared with control. P1 treatment was better for growth of Jabon that was inoculated by mycorrhiza. Acaulospora sp.1 (M1) originally from Samama without fertilizer had the best effectiveness for Jabon growth.Key words: Acaulospora, indigenous

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Early Spring Snowmelt and Summer Droughts Strongly Impair the Resilience of Key Microbial Communities in Subalpine Grassland Ecosystems

10.1101/2021.03.15.435477 ◽

2021 ◽

Author(s):

Farhan Hafeez ◽

Lionel Bernard ◽

Jean-Christophe Clement ◽

Franck Poly ◽

Thomas Pommier

Keyword(s):

Microbial Communities ◽

Plant Biomass ◽

Early Spring ◽

Climatic Extremes ◽

Soil Microbial ◽

Cascading Effect ◽

Growing Seasons ◽

Grassland Ecosystems ◽

Microbial Responses ◽

Early Snowmelt

Subalpine grassland ecosystems are important from biodiversity, agriculture, and touristic perspectives but their resilience to seasonally occurring climatic extremes is increasingly challenged with climate change, accelerating their vulnerability to tipping points. Microbial communities, which are central in ecosystem functioning, are usually considered as more resistant and highly resilient to such extreme events due to their functional redundancy and strong selection in residing habitats. To investigate this, we explored the soil microbial responses upon recurrent summer droughts associated with early snowmelt in grasslands mesocosms set-up at the Lautaret Pass (French Alps). Potential respiration, nitrification and denitrification were monitored over a period of two growing seasons along with quantification of community gene abundances of total bacteria as well as (de)nitrifiers. Results revealed that droughts had a low and short-term impact on bacterial total respiration supporting their hypothesized high resistance and ability to recover. Nitrification and abundances of the corresponding functional guilds showed relatively strong resistance to summer droughts but declined in response to early snowmelt. This triggered a cascading effect on denitrification but also on the abundances of denitrifying communities which could recover from all climatic extremes except from the summer droughts where nitrifiers were collapsed. Denitrification and the respective functional groups faced high impact of applied stresses with strong reduction in the abundance and activity of this specialized community. Although, the consequently lower microbial competition for nitrate may be positive for plant biomass production, warnings exist when considering the potential nitrogen leaching from these ecosystems as well as risks of greenhouses gases emission such as N2O

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Critical time for weed removal in dicamba tolerant soybean as influenced by pre emergence herbicides

Acta herbologica ◽

10.5937/actaherb2001055j ◽

2020 ◽

Vol 29 (1) ◽

pp. 55-62

Author(s):

Darko Jovanović ◽

Ivan Cuvaca ◽

Jon Scott ◽

Stevan Knežević

Keyword(s):

Field Experiment ◽

Growth Stage ◽

Critical Time ◽

Split Plot ◽

Main Plot ◽

Plot Design ◽

Weed Removal

Field experiment was conducted in 2019 at Haskell Agriculture Laboratory, Concord, NE, USA. Goal of the study was to test the influence of PRE-EM herbicides on the Critical Time for Weed Removal (CTWR) in dicamba-tolerant soybean. The study was arranged in a split-plot design which consisted of four herbicide regimes as main plot treatments and seven weed removal timings as subplot treatments, with four replications. The herbicide regimes included: (1) no PRE and glyphosate, (2) acetochlor and dicamba as PRE and glyphosate as POST, (3) acetochlor and dicamba as PRE and glyphosate and dicamba as POST, and (4) acetochlor and fomesafen as PRE and acetochlor, glyphosate and dicamba as POST. The five weed removal times included the V1, V3, V6, R2 and R5, and there were also weedy and weed-free season long plots. By utilizing herbicide regimes, the CTWR was delayed to 632 GDD (until V4 soybean growth stage, 28 days after emergence) for acetochlor and dicamba as PRE and glyphosate as POST, 861 GDD (until V6 soybean growth stage, 32 days after emergence) for acetochlor and dicamba as PRE and glyphosate and dicamba as POST, and 1060 GDD (until R1 soybean growth stage, 42 days after emergence) for acetochlor and fomesafen as PRE and acetochlor, glyphosate and dicamba as POST.

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