Effect of conventional and organic production systems on the yield and quality of field tomato cultivars grown in Tunisia

2009 ◽  
Vol 89 (13) ◽  
pp. 2275-2282 ◽  
Author(s):  
Anissa Riahi ◽  
Chafik Hdider ◽  
Mustapha Sanaa ◽  
Néji Tarchoun ◽  
Mohamed Ben Kheder ◽  
...  
Keyword(s):  
Production Systems ◽  
Organic Production ◽  
Yield And Quality ◽  
Tomato Cultivars

IMPACT OF PRODUCTION SYSTEMS AND FERTILIZER APPLI-CATION ON YIELD AND QUALITY OF STRAWBERRIES

2006 ◽  
pp. 59-64 ◽  
Author(s):  
M. Martinsson ◽  
A. Kwast ◽  
G. Cieslinski ◽  
W. Treder
Keyword(s):  
Production Systems ◽  
Yield And Quality

scholarly journals Lettuce Yield and Quality When Grown in High Tunnel and Open-Field Production Systems Under Three Diverse Climates

2012 ◽  
Vol 22 (5) ◽  
pp. 659-668 ◽  
Author(s):  
Russell W. Wallace ◽  
Annette L. Wszelaki ◽  
Carol A. Miles ◽  
Jeremy S. Cowan ◽  
Jeffrey Martin ◽  
...  
Keyword(s):  
Open Field ◽  
Production Systems ◽  
Organic Production ◽  
High Tunnel ◽  
Mount Vernon ◽  
Yield And Quality ◽  
High Tunnels ◽  
Lettuce Yield ◽  
Field Plots ◽  
Field Production

Field studies were conducted during 2010 and 2011 in Knoxville, TN; Lubbock, TX; and Mount Vernon, WA; to compare high tunnel and open-field organic production systems for season extension and adverse climate protection on lettuce (Lactuca sativa) yield and quality. The climates of these locations are diverse and can be typified as hot and humid (Knoxville), hot and dry (Lubbock), and cool and humid (Mount Vernon). In both years, 6-week-old lettuce seedlings of ‘New Red Fire’ and ‘Green Star’ (leafy type), ‘Adriana’ and ‘Ermosa’ (butterhead type), and ‘Coastal Star’ and ‘Jericho’ (romaine type) were transplanted in the late winter or early spring into subplots covered with black plastic and grown to maturity (43 to 65 days). Lettuce harvest in Knoxville occurred at 50 to 62 days after transplanting (DAT), with open-field lettuce harvested an average of 9 days earlier compared with high tunnel plots both years (P > 0.0001). The earlier than anticipated harvests in the open-field in Knoxville in 2010 were due to lettuce bolting. In Lubbock, high tunnel lettuce was harvested an average 16 days earlier in 2010 compared with open-field lettuce (P > 0.0001), while in 2011, high temperatures and bolting required that open-field lettuce be harvested 4 days earlier than lettuce grown in high tunnels. On average, lettuce cultivars at Mount Vernon matured and were harvested 56 to 61 DAT in 2010 and 54 to 64 DAT in 2011 with no significant differences between high tunnel and open-field production systems. Total and marketable yields at Mount Vernon and Lubbock averaged across cultivars were comparable in both high tunnel and open-field plots. At Knoxville, although total yields were significantly higher (P > 0.0062) in high tunnels than open-field plots, incidence of insect, disease, and physiological damage in high tunnel plots reduced lettuce quality and marketable yield (P > 0.0002). Lettuce head length:diameter ratio (LDR) averaged across cultivars was equal between high tunnel and the open field at all three locations. High tunnel production systems offer greater control of environments suitable for lettuce production, especially in climates like Knoxville and Lubbock where later-planted open-field systems may be more susceptible to temperature swings that may affect lettuce quality. These results suggest that although high tunnel culture alone may influence lettuce yield and quality, regional climates likely play a critical role in determining the impact of these two production systems on marketable lettuce yields.

scholarly journals Yield and fruit quality of apple from conventional and organic production systems

2008 ◽  
Vol 43 (3) ◽  
pp. 333-340 ◽  
Author(s):  
Cassandro Vidal Talamini do Amarante ◽  
Cristiano André Steffens ◽  
Álvaro Luiz Mafra ◽  
Jackson Adriano Albuquerque
Keyword(s):  
Fruit Quality ◽  
Management System ◽  
Production Systems ◽  
Titratable Acidity ◽  
Organic Production ◽  
Soluble Solids ◽  
Apple Trees ◽  
Growing Seasons ◽  
Solids Content

The objective of this study was to assess the yield and fruit quality of apple produced with a conventional and an organic production systems in Southern Brazil. The orchards consisted of alternate rows from 10 to 12-year old 'Royal Gala' and 'Fuji' apple trees on M.7 rootstocks, grown as slender spindles, on 4x6 m spacing. Eighteen apple trees of each cultivar and management system were randomly selected and assessed for nutrition, flowering, fruit set, yield, and fruit quality during two growing seasons (2002/2003 and 2003/2004). The organic management system resulted in lower concentrations of K, Mg, and N in leaves and fruits, and in smaller fruits for both cultivars, and lower fruit yield for 'Fuji' than from the conventional production system. For both cultivars, fruits from the organic orchard harvested at commercial maturity had a more yellowish skin background color, higher percentage of blush in the fruit skin, higher soluble solids content, higher density, higher flesh firmness, and higher severity of russet than fruits from the conventional orchard. Fruit from the organic orchard had lower titratable acidity in 'Royal Gala', and higher incidence of moldy core and lower incidence of watercore in 'Fuji', than fruit from the conventional orchard. A non-trained sensory panel detected no significant differences for fruit attributes of taste, flavor and texture between fruit from the production systems for either cultivar.

scholarly journals Effect of Gibberellic Acid on Growth, Yield, and Quality of Leaf Lettuce and Rocket Grown in a Floating System

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 382 ◽  
Author(s):  
Alessandro Miceli ◽  
Alessandra Moncada ◽  
Leo Sabatino ◽  
Filippo Vetrano
Keyword(s):  
Gibberellic Acid ◽  
Nutrient Solution ◽  
Production Systems ◽  
Growth Yield ◽  
Mineral Nutrient ◽  
Yield And Quality ◽  
Floating System ◽  
Use Efficiency ◽  
Leaf Lettuce

Gibberellins (GAs) are growth hormones strongly involved in a wide variety of physiological activities. Currently, gibberellins are commercially used to enhance phenotypic characteristics, earliness, and productivity of many vegetable and ornamental crops. In this work, the efficacy of supplementation of low levels of gibberellic acid (0, 10−8, 10−6, and 10−4 M GA3) through the mineral nutrient solution of a floating system on yield and quality of leaf lettuce and rocket plants was tested. The marketability of plants was lost when 10−4 M GA3 was added to the mineral nutrient solution. This study demonstrated that the addition of 10−4 M GA3 exceeded the acceptable threshold for use in hydroponics production systems. Below the concentration of 10−4 M, the presence of GA3 in the mineral nutrient solutions (MNS), especially at 10−6 M GA3, stimulated plant growth and enhanced the yield. Various morphological and physiological traits were enhanced by GA3 treatments (biomass accumulation, leaf expansion, stomatal conductance, water use efficiency (WUE), Nitrogen use efficiency (NUE), etc.), with superimposable trends in both lettuce and rocket. The addition of 10−6 M GA3 to the nutrient solution of a hydroponic floating system can promote growth and quality of lettuce and rocket plants.

The effect of climatic conditions on the quality of medium-growth chicken meat in organic production systems

2020 ◽  
Vol 10 (S1) ◽  
pp. 109-116
Author(s):  
A. Sarmiento ◽  
C. Palacios ◽  
I. Revilla ◽  
A. M. Vivar-Quintana
Keyword(s):  
Production Systems ◽  
Climatic Conditions ◽  
Chicken Meat ◽  
Organic Production

scholarly journals Influence of organic amendments on growth, yield and quality of wheat and on soil properties during transition to organic production

2017 ◽  
Author(s):  
Gopinath KA
Keyword(s):  
Soil Properties ◽  
Transition Period ◽  
Organic Amendments ◽  
Mineral Fertilizer ◽  
Application Rate ◽  
Organic Production ◽  
Fertilizer Treatment ◽  
Yield And Quality ◽  
Application Rates

A transition period of at least two years is required for annual crops before the produce may be certified as organically grown. The purpose of this study was to evaluate the effects of the three organic amendments on yield and quality of wheat (Triticum aestivum L.) and on soil properties during transition to organic production. The organic amendments were composted farmyard manure (FYMC), vermicompost and lantana (Lantana spp. L.) compost applied to soil at four application rates (60, 90, 120 and 150 kg N ha-1). The grain yield of wheat in all the treatments involving organic amendments was markedly lower (36-65 % and 23-54 % less in the first and second year of transition, respectively) compared with the mineral fertilizer treatment. For the organic treatments applied at equivalent N rates, grain yield was higher for FYMC treatment closely followed by vermicompost. In the first year of transition, protein content of wheat grain was higher (85.9 g kg-1) for mineral fertilizer treatment whereas in the second year, there were no significant differences among the mineral fertilizer treatment and the highest application rate (150 kg N ha-1) of three organic amendments. The grain P and K contents were, however, significantly higher for the treatments involving organic amendments than their mineral fertilizer counterpart in both years. Application of organic amendments, irrespective of source and rate, greatly lowered bulk density (1.14-1.25 Mg m-3), and enhanced pH (6.0-6.5) and oxidizable organic carbon (13-18.8 g kg-1) of soil compared with mineral fertilizer treatment after two-year transition period. Mineral fertilized plots, however, had higher levels of available N and P than plots with organic amendments. All the treatments involving organic amendments, particularly at higher application rates, enhanced soil microbial activities of dehydrogenase, -glucosidase, urease and phosphatase compared with the mineral fertilizer and unamended check treatments. We conclude that the application rate of 120 and 150 kg N ha-1 of all the three sources of organic amendments improved soil properties. There was, however, a 23-65% reduction in wheat yield during the two years of transition to organic production.

scholarly journals Yield and quality of seeds of lettuce genotypes produced under organic management

2019 ◽  
Vol 41 (3) ◽  
pp. 352-358
Author(s):  
Josiany Thamara Alves Souza ◽  
Cândido Alves da Costa ◽  
Delacyr da Silva Brandão Junior ◽  
João Batista de Campos Menezes ◽  
Warley Marcos Nascimento ◽  
...  
Keyword(s):  
Dry Matter ◽  
Germination Rate ◽  
Swine Manure ◽  
Organic Production ◽  
Organic Management ◽  
Physical Test ◽  
Organic Cultivation ◽  
Yield And Quality ◽  
Grand Rapids

Abstract: is one of the main vegetable species used in organic production. However, studies and research in the organic area are scarce. This study aimed to evaluate the yield and quality of seeds of lettuce genotypes produced in two consecutive years under an organic management system. Two plantations were installed under open field conditions corresponding to autumn/winter in 2016 and 2017. Ten lettuce genotypes were evaluated in four replications using a biofertilizer made from swine manure in the management and manual harvesting of seeds. Evaluations consisted of seed yield (in kg.ha−1), physical test (1000-seed weight), and germination and vigor test (first germination count, germination rate index, and seedling dry matter). The genotype Cubana and two Grand Rapids had higher yields under the tested conditions. Higher seed weights were recorded in 2017. Both genotypes Grand Rapids reached the minimum germination standard established for commercialization (80%). Vanda and AC 5058 showed a better performance for germination rate index and first germination count, while Cinderela had a better seedling dry matter. These varieties were promising for organic cultivation.

Effect of drip and sprinkle irrigation on yield and quality of five tomato cultivars in southwestern Ontario

1995 ◽  
Vol 75 (1) ◽  
pp. 225-230 ◽  
Author(s):  
C. S. Tan
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Soil Water Potential ◽  
Soluble Solids ◽  
Moisture Regime ◽  
Yield And Quality ◽  
Tomato Cultivars ◽  
Irrigation Treatments ◽  
Sprinkle Irrigation

The purpose of this study was to assess yield and quality of tomato (Lycopersicon esculentum Mill.) in response to drip (DI) and sprinkle irrigation (SI) in southwestern Ontario. Three irrigation treatments, DI, SI and no irrigation (NI) and five tomato cultivars, FM6203, H2653, H722, OH7814 and PUR812, grown on a Fox sandy loam soil, were evaluated during four growing seasons between 1986 and 1989. Both DI and SI increased the marketable tomato yield in 3 of 4 yr. In general, DI resulted in higher tomato yields than SI, but this was only statistically significant in 1 yr. Sprinkle irrigation out performed drip irrigation in one hot, dry year in 1988. Throughout the 4 yr, OH7814 was consistently high yielding, H2653 was consistently low yielding and FM6203, H722 and PUR812 performed more consistently than the other cultivars. In wet years, yield differences due to cultivar treatments were greater than those due to irrigation treatments, while in dry years, yield differences due to both irrigation and cultivar treatments were highly significant. Soluble solids and total solids were decreased by DI and SI. The DI produced the most uniform soil moisture regime, followed by SI. The NI plots had the greatest degree of water stress, as indicated by the low soil water potential, low stomatal conductance and elevated crop canopy temperature. Key words:Lycopersicon esculentum, yield, soil water potential

scholarly journals Verification of the effects of Lignohumat B and Synergin® in organic strawberry production

2011 ◽  
Vol 59 (3) ◽  
pp. 101-110 ◽  
Author(s):  
Šárka Kremláčková ◽  
Petr Salaš ◽  
Stanislav Boček
Keyword(s):  
Root System ◽  
Organic Production ◽  
Recommended Dose ◽  
Average Yield ◽  
Limited Effect ◽  
Yield And Quality

The objective of this work is to determine the effect of auxiliary plant preparations such as Lignohumat B and biostimulant Synergin® on yield and quality of strawberry production. The two year trial was carried out on two plots of the Horticultural Faculty in Lednice Mendeleu. Among different cultivars the ‘Honeoye’ and ‘Symphony’ have been selected, they are recommended for organic production. Lignohumat B was applied to strawberries according to the manufacturer instructions: soaking the root system, watering after planting, spraying on the leaves two weeks before flowering and after flowering in 1% concentration. Synergin® was applied before flowering by means of foliar sprayer and two weeks after flowering in the recommended dose of 3 l.ha−1.In trial No. 1, the average yield for the two years 2007 and 2008 was 24.69 t.ha−1 for the ‘Honeoye’ cultivar and 35.48 t.ha−1 for ‘Symphony’. The average yield per plant for ‘Honeoye’ cultivar was 296.16 g and for ‘Symphony’ it was 426.36 g. Trial No. 2 was carried out in 2008−2009, the yield for ‘Honeoye’ cultivar was 35.91 t.ha−1 and for ‘Symphony’ variety 36.5 t.ha−1. On average for two years trials, the yield of one plant for ‘Honeoye’ cultivar was 429.27 g and for ‘Symphony’ cultivar 439.02 g. The result is that the auxiliary plant preparations (Lignohumat B and Synergin®) had a limited effect on strawberry plants and the results were not statistically significant. Experiments demonstrate that the two selected cultivars can be recommended to the organic production.

scholarly journals Yield and quality of fruits of strawberry cultivars in an organic production system

Científica ◽  
2017 ◽  
Vol 45 (3) ◽  
pp. 271 ◽  
Author(s):  
Jeferson Tonin ◽  
José Tobias Marks Machado ◽  
Jorge Atílio Benati ◽  
Bruna Rohrig ◽  
Lisiane Sobucki ◽  
...  
Keyword(s):  
Production System ◽  
Organic Production ◽  
Yield And Quality ◽  
Strawberry Cultivars
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