Conventional, integrated and organic winter wheat production in The Netherlands in the period 1993–1997

Tamis, W.L.M.; Brink, W.J. van den

doi:10.1016/s0167-8809(99)00078-x

Cited by 26 publications

(11 citation statements)

References 10 publications

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“…For the 24 fields, the coefficient of variation for grain yield was 40% with an average of 3.5 t·ha -1 . These values are comparable with or greater than those reported in the literature on organic winter wheat (Bulson et al, 1996;Holle and Untiedt, 1999;Tamis and van den Brink, 1999;Olesen et al, 2002). Furthermore, organic wheat yield was consistently lower and more variable than reported for conventional agriculture Leterne et al, 1994).…”

Section: Variation In Grain Yieldsupporting

confidence: 77%

Yield variation in organic winter wheat: a diagnostic study in the Southeast of France

David

Jeuffroy

Henning

et al. 2005

Agron. Sustain. Dev.

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A diagnostic method for assessing regional variations in yield was implemented for a network of 24 organic wheat fields located in two neighboring regions, Diois and Val de Drôme (France). We studied: yield and its components; field environmental conditions of the fields; relations between indicators of potential limiting factors and yield components; and linkages between crop management and yield-limiting factors. The yield performances were low and variable (3.5 ± 1.4 t·ha -1 ). The relative kernel number (RKN) was significantly related to nitrogen nutrition and weed density at flowering. The nitrogen nutrition index (NNIf) had a strong and positive effect on relative kernel number, while weed density (1/WF) had a negative effect. The percentage of kernel number variation explained by the regression model (RKN = 0.112 + 0.609 × NNIf + 0.2 × 1/WF) was adequate (Adj. R 2 = 0.53) with a RMSE of 0.09. The duration of the period of grain filling, reflected in the temperature sum, had a strong and positive effect on relative kernel weight (RTKW), while soil compaction and high temperature had a negative influence. Adjusted R 2 for the model was 0.42 with a RMSE of 0.16. The results confirm that legumes preceding crops improve nitrogen nutrition on subsequent winter wheat, e.g. the Nitrogen Nutrition Index at flowering (NNIf) = 0.51 ± 0.12 for a crop rotation with a rate of legumes over 37% vs. 0.41 ± 0.11 for a crop rotation with a rate of legumes under 25%. Alfalfa preceding crops significantly limited the weed density at harvest while stony soils and early sowing (before November 1st) enhanced weed density. organic farming / winter wheat / yield / limiting factors / diagnostic method * Corresponding author: davidc@isara.fr Article published by EDP Sciences and available at http://www.edpsciences.org/agro or http://dx.doi.org/10.1051/agro:2005016 214 C. David et al.for each field, as described by Boiffin et al. (1981) and Meynard and David (1992). For instance, Leterme et al. (1994) analyzed the effect of crop management and environment on wheat yield variation in Thymerais, France (48.3°N, 1.3°E). It was established that the major factors responsible for yield differences were drought stress during stem elongation and meiosis, root and stem diseases and soil structure. Then these factors were explained by differences in soil moisture capacity, rainfall distribution, sowing date and the nature of the preceding crops.This paper focuses on understanding organic wheat yield performance in terms of yield-limiting factors and crop management characteristics. The analysis consisted of four stages: (i) yield and its components were described, (ii) we characterized the environmental conditions of the fields, (iii) we analyzed the relations between indicators of possible limiting factors and yield components, and (iv) determined the relations between crop management and yield-limiting factors.

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Section: Variation In Grain Yieldsupporting

confidence: 77%

Yield variation in organic winter wheat: a diagnostic study in the Southeast of France

David

Jeuffroy

Henning

et al. 2005

Agron. Sustain. Dev.

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“…Whether or not, however, genetic engineering assumes a significant role in this respect, as suggested by some (Trewavas, 2002a), is at present debatable and at least controversial. Likewise, organic farming may lead to reduced yields (though yields of organically produced crops have been shown to be highly variable (Mader et al, 2002;Martini et al, 2004;Tamis and van den Brink, 1999)) and thus, also fail to fulfill this task (Taeymans, 2000).…”

Section: Discussionmentioning

confidence: 99%

Organic Food: Buying More Safety or Just Peace of Mind? A Critical Review of the Literature

Magkos

Arvaniti

Zampelas

2006

Critical Reviews in Food Science and Nutrition

308

193

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“…Several diseases occur not because of poor growing conditions, but because of an imbalance between the plant and the environmental conditions; this can lead to an imbalance in the metabolism processes, and the attraction of insects, fungal and bacterial diseases (Tamis & Van den Brink, 1999). The main selection criterion for good breeding is not the level of resistance; it is rather the ability of a specific plant to create a certain level of yield and quality in spite of the pressure of infectious diseases (Lammerts van Bueren, 2002).…”

Section: Disease Resistancementioning

confidence: 99%

Wheat Growing and Quality in Organic Farming

Konvalina¹,

Stehno²,

Capouchová³

et al. 2011

Research in Organic Farming

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Conventional, integrated and organic winter wheat production in The Netherlands in the period 1993–1997

Cited by 26 publications

References 10 publications

Yield variation in organic winter wheat: a diagnostic study in the Southeast of France

Yield variation in organic winter wheat: a diagnostic study in the Southeast of France

Organic Food: Buying More Safety or Just Peace of Mind? A Critical Review of the Literature

Wheat Growing and Quality in Organic Farming

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