Agronomic challenges for organic crop husbandry

With respect to resource management and environmental impact, organic farming offers rationales for agricultural sustainability. However, agronomic productivity is usually higher with conventional farming. This work aimed at investigating two factors of major importance for the agronomic productivity of organic crop husbandry, nitrogen (N) supply through symbiotic N fixation (SNF) and weed occurrence. Perennial red clover-grass leys and spring cereal crops subjected to regular agricultural practices were studied on 34 organic farms located in the southern and the north-western coastal regions of Finland. Herbage growth, clover content as a proportion of the ley and extent of SNF in perennial leys, and the occurrence of weed species and weed-crop competition in spring cereal stands were related to climate conditions, soil properties, and management measures. The herbage accumulated from the first and the second cut of one- and two-year-old leys averaged 7.5 t DM ha-1 (SD ± 1.7 t DM ha-1); the clover content averaged 43.9% (SD ± 18.8%). Along with the clover content, herbage production decreased with ley age. Radiation use efficiency (RUE) correlated positively with clover proportion but despite low clover contents, three-year-old leys were still productive with regard to RUE. SNF in the accumulated annual growth of one- and two-year-old leys averaged 247.5 kg N ha-1 yr-1 (SD ± 114.4 kg N ha-1 yr-1). It was supposed that if red clover-grass leys constituted 40% of the rotation, then the mean N supply by SNF would be able to sustain two or three succeeding cereal crops (green manure and forage ley, respectively), yielding 3.0 to 4.0 t grain ha-1. Being a function of clover biomass, the SNF increased from the first to the second cut and thereafter declined with ley age. Coefficients of variation of clover contents (and SNF) between and within fields were around 50%, which was about twice as high as those of herbage production. The lower were the clover contents, the higher were the within-field variations of clover as a proportion of the ley. Low clover contents in one-year-old leys and increasing variability with ley age suggested that red clover growth was limited by poor establishment and poor overwintering. The proportions of clover in leys were lower and their variability was higher in the northwest than in the south. Soil properties, primarily texture and structure, had a major impact on clover proportion and herbage production, which largely explained regional differences in ley growth. Within-field variability of soil properties can be amended through site-specific measures, including drainage, liming, and applications of organic manures and mineral fertilizers. Overwintering and the persistence of leys can be improved by the choice of winter-hardy varieties, careful establishment and the appropriate harvest regime. Mean grain yields of spring cereal crops amounted to 3.2 t ha-1 in the south and 3.6 t ha-1 in the northwest. At 570 and 565 m-2 for the south and northwest respectively, mean weed densities did not differ between the regions, whereas the respective mean weed biomass of 697 and 1594 kg dry weight ha-1, respectively did differ. Weed abundance varied remarkably between single fields. The number of weed species was higher in the south than in the northwest. For example, Fumaria officinalis and Lamium spp. were found only in the south. Frequencies and abundances of Lapsana communis, Myosotis arvensis, Polygonum aviculare, Tripleurospermum inodorum, and Vicia spp. were higher in the south, whereas those of Elymus repens, Persicaria spp. and Spergula arvensis were higher in the northwest. The number of years since conversion to organic farming, i.e. long-term management, was one of the variables that explained the abundance of single weed species. E. repens was the weed species whose biomass increased most with the duration of organic farming. Another significant variable was crop biomass, which was affected by short-term management. The presence of different weed species was related to the duration of organic farming and to low crop yield. This finding demonstrated that it was not the organic farming regime per se, which resulted in high weed infestation and low yielding crops, but failures in the understanding and the management of organic farming systems. Successful weed control relies on farm- and field-specific long- and short-term management approaches. The agronomic productivity of ley and spring cereal crops managed by full-time farmers with an interest in organic farming was on the same level as of the mean for conventional farming. Given the many options for further improvements of the agronomic performance of organic arable systems, organic farming offers foundations for the development of sustainable agriculture. The main threat to the sustainability of farming in Finland, both conventional and organic, is the spatial separation of crop production and animal husbandry by region, along with the simplification of associated crop rotations.

Samarbete mellan konkurrenter - en undersökning av österbottniska sm-företag

Under senare tid har förekomsten av samarbete mellan konkurrerande sm-företag ökat. Forskningen kring ämnet har dock bedrivits i mindre skala, framför allt om man beaktar finländska (nordiska) förhållanden. Syftet med denna undersökning är att kartlägga förekomsten av samarbete mellan konkurrerande sm-företag i Österbotten (Finland), samt beskriva dessa. Gällande demografiska variabler jämförs dessa företag även med sm-företag som inte samarbetar. Data insamlades genom en enkät utskickad i november 2001 till 345 sm-företag i Österbotten. Svarsprocenten var 35.1. Av de respondenter som besvarade enkäten, var 47.9 procent involverade i ett eller flera samarbeten med ett eller flera företag som var deras konkurrenter. Samarbete mellan konkurrenter är således inte ett ovanligt fenomen, utan innefattar allt från informella, operativa samarbeten till formella, strategiskt viktiga samarbeten. Samarbete inom produktion var den mest vanligt förekommande formen av samarbete. Partnern kom från Finland, även om målmarknaderna för samarbetet fanns både i Finland och i utlandet. Denna undersökning kunde inte identifiera någon större skillnad mellan de sm-företag som samarbetade med konkurrenter och de sm-företag som inte samarbetade. Det intressanta är således att det inte verkar finnas några skillnader vad gäller ålder, omsättning, omsättningsökning, underleverans- och exportverksamhet mellan de samarbetande och de icke samarbetande företagen. Skillnaderna bör således sökas i andra variabler. Den enda signifikanta skillnaden kunde upptäckas i upplevelsen av konkurrens. Tidigare forskning har identifierat att osäkerhet i konkurrensen är ett incitament till att börja samarbeta med konkurrenter. Denna undersökning förstärker detta antagande. De samarbetande företagen upplevde att konkurrensen var hårdare än de icke samarbetande företagen. Bland de samarbetande företagen var det speciellt de mindre (med en personalstyrka mellan 10 och 50 arbetstagare) som upplevde att konkurrensen var hård. Undersökningen har finansierats med stipendiemedel från Sparbanksstiftelsen i Vasa och Handlande Gustav Svanljungs fond.