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THE INVESTIGATION OF CROP WEEDINESS IN THE CROP ROTATION OF ORGANIC FARMING SYSTEM

Ausmane , M.; Gaile, Z. and Melngalvis, I. (2008) THE INVESTIGATION OF CROP WEEDINESS IN THE CROP ROTATION OF ORGANIC FARMING SYSTEM. Latvian Journal of Agronomy, No.10, pp. 25-31.

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Summary

Field experiments were conducted during the period of 2004 – 2006 at the Research and
Study Farm „Vecauce”. The aim of the investigation was to establish the weediness’ dynamics of
crops in a six-field crop rotation of an organic farming system. The field was certified as being
organic. Crop rotation: 1. triticale/ rye (for green manure in spring), 2. oil radish (for green
manure)/ rye (for green manure in autumn), 3. potatoes, 4. oats, 5. vetch-oats mix (for green forage)
with an undersown mixture of red clover and timothy, 6. red clover and timothy. Conventional soil
tillage was done according to the requirements of the crops. The weeds were counted two times
during the vegetation period of crops: at the early development stages of crops (for instance, at the tillering of cereals) and before the crop harvesting. The composition of weed flora comprised from
59 species in the crops’ stands. The annual dicotyledonus were dominating groups of the weed
flora. The most abundant weeds were lambsquarters (Chenopodium album L.), quackgrass
(Elytrigia repens (L.) Nevski), common yellow rocket (Barbarea vulgaris R. Br.p.p.). The
significantly smaller amount of weeds among crop rotation links was observed in the link rye/ oil
radish/ rye – potatoes – oats. Much worse suppression of weeds was obtained in the crop rotation
link red clover and timothy – triticale/ rye – oil radish/ rye. The number of weeds in the fields of
crop rotation in the organic farming system is dependent on the cultivated crops, the succession of
crops in the crop rotation links and crop cultivation technologies.


EPrint Type:Journal paper
Subjects: Crop husbandry > Weed management
Research affiliation: Latvia
Deposited By: Grinberga Zalite, Ms Gunta
ID Code:18608
Deposited On:09 Apr 2011 07:51
Last Modified:09 Apr 2011 07:51
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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