Results 81 to 90 of about 465,455 (202)
Horticultural weed control in organic systems – a modelling approach [PDF]
, 2002 This report was presented at the UK Organic Research 2002 Conference. Weed control is an important yet mainly unaddressed research issue in organic systems. At present there is little agronomic support to underpin weed management decisions.
Grundy, Andrea C, Turner, Rebecca J
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Scientific ReportsLeaf extract of Asclepyas syriaca was utilized to investigate the phytotoxic effects on the germination and seedling growth of Amaranthus retroflexus L., Chenopodium album L., and Iva xanthifolia Nutt. and to evaluate the relative chlorophyll content and
Jelena Gajić Umiljendić +6 more
doaj +1 more source
Allelopathic effects and weed suppressive ability of cover crops
Plant, Soil and Environment, 2016 Field and laboratory experiments were conducted to investigate the weed suppressing effects of cover crops in single and mixed cultivation. Weed densities in the field experiments ranged from 0 to 267 plants/m2 with Chenopodium album L., Matricaria ...
Ch. Kunz +4 more
doaj +1 more source
AFROweeds: a collaborative and participative online network to enhance weed capacities in Africa [PDF]
, 2011 Weed competition cause high yield losses in African crop production systems. Conservative estimates show that even for rice alone weeds cost economies of sub-Saharan Africa (SSA) already a near $1.5 billion per year.
Grard, Pierre +3 more
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Development of weeds in organic crop rotation experiments [PDF]
, 2005 Weeds are a major problem in organic farming. Preventive as well as curative measures must be utilised to manage the weeds and avoid proliferation. Besides direct weed control measures, many different aspects of planning and management in the cropping ...
Askegaard, M. +2 more
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Effect of organic crop rotations on long-term development of the weed seedbank [PDF]
, 2002 Changes in the weed seedbank were monitored between 1991 and 1998 in two experiments that were established to compare organic crop rotations at two sites in NE Scotland.
Coutts, Michael +5 more
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A Dynamic Optimisation Model of Weed Control [PDF]
It is argued in this paper that static approaches to weed management, where the benefits and costs are only considered within a single season, are inappropriate for assessing the economic benefits of weed control technologies. There are carryover effects
Cacho, Oscar J., Jones, Randall E.
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PlantsWhen glufosinate-resistant transgenic Brassica napus (transgene PAT located on C chromosome) were backcrossed with wild Brassica juncea, 50% of the progeny expressed PAT under favourable conditions.
Zicheng Shao +4 more
doaj +1 more source
Economic Aspects of Physical Intra-Row Weed Control in Seeded Onions [PDF]
, 1998 The paper presents a model to calculate the costs for weed control in organic row crops. The model makes it possible to analyse the economic consequences of different weed control strategies in row crops. Particularly the time needed for hand-weeding had
Melander, Senior scientist Bo
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Change of the weed seed bank during the first four years of a five-course crop rotation with organic vegetables [PDF]
, 2008 In a five-course rotation with organic vegetables (white cabbage, carrot and onion) the weed seed bank was reduced the year after two continuous years with red clover, mainly because of mowing of the second year red clover.
Brandsæter, Lars Olav +2 more
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