Archive

94 posts

Environment

Spiess E.

Nitrogen and phosphorus balances of Swiss agriculture between 1975 and 1995 Are outdoor pigs a groundwater hazard?

The nutrient balances of the Swiss agriculture were calculated for nitrogen (N) and phosphorus (P) for all the years between 1975 and 1995 on the basis of the farmgate balance, a comparison between nutrient input into agriculture and output from agriculture. Nitrogen surplus amounted to about 124‘000 t N and 116 kg N/ha agricultural used…

New cultivars of Italian ryegrass: Lipurus and Vicugna

Two new cultivars of Italian ryegrass have been released frequently: Lipurus and Vicugna. These tetraploid cultivars originate from the same breeding stock as the well-known varieties Lipo and Ellire. They are distinguished by an improved resistance against important diseases whilst maintaining the high yield level of Ellire. Mainly resistance against bacterial wilt <br>( Xanthomonas campestris…
Environment

Weisskopf P., Zihlmann U., Wiermann C., Horn R., Anken T., Diserens E.

Influences of ploughing on soil structure

“In a field trial it was investigated whether soil can be tilled more considerate with onland ploughing (all four wheels of the tractor run on the untilled soil surface) than with conventional ploughing (two wheels of the tractor run in the furrow). As expected conventional ploughing caused the highest soil stress at 35 cm depth,…
Animal production

Van Caenegem L.

Resistance of silo floors to silage juices

Seven different types of concrete, three types of asphaltic concrete and three types of mastic asphalt were exposed to silage juice of maize during 9 weeks. The samples were mounted on transmission chains making an alternation between immersion and drying possible. The measuring of the weight losses showed that the resistance of the concrete could…
Agricultural economics

Malitius O., Pfefferli S.

Agro-economic research as decision support

The FAT’s agro-economic research is focused on analyses, calculations and prognosis helping the farmers, agricultural advisors and agricultural policy in their decision-making processes. Any decision support is an intensive dialogue between the advisors and the decision-makers. The quantitative methods used depend on the specific problems. Agro-political measures in particular must be assessed according to economic,…

Research in the field of animal housing systems for the assessment of sustainability

Sustainable, that is to say economic, ecological and socially responsible production methods are increasingly requested by the general public and the agricultural policy makers. The primary goal of research in the field of process engineering is to develop and improve animal housing systems. Moreover, the research establishes essential bases for decisions in order to assess…
Agricultural economics

Gaillard G., Irla E.

Life cycle assessment of weed control in field crops

An environmental life cycle assessment of mechanical and mechanical-chemical weed control methods was established for ware potatoes, grain maize, winter rape and winter wheat, and compared to that of chemical techniques. Given the assumptions defined, the following conclusions can be drawn: The factors (fuel consumption, mechanisation, herbicide production, emissions, etc.) influencing the environmental impacts strongly…
Environment

Zihlmann U., Weisskopf P., Dubois D., Tschachtli R.

Soil structure of an integrated, a conventional and a low input farming system

The objective of the long-term project of Burgrain, on a mixed farm near Lucerne (Switzerand), is to compare integrated, conventional and low input farming systems taking agronomical, economical and ecological characteristics into consideration. Since 1992 soil tilth has been characterized every year by spade diagnostics and measurements of aggregate stability. The quality of the soil…
Environment

Ballmer T., Hebeisen T., Winiger F.A.

Control of seed-borne snow mould (Gerlachia nivalis) of winter wheat with warm wate Use of oil for reducing virus Y infection in seed potatoes

In 3-year plot and field experiments, the effect of Telmion, a canola oil, on the PVY-transmission by aphids was investigated. Telmion applications all 10 days reduced PVY infections between 30 and 60 %, independent of aphid density and weather conditions. The oil-treated plants of seed potatoes showed a slight yield reduction of 3 to 10…
Plant production

Wyss U., Vogel R.

Ensilability of some herbs of intensively used meadows

The ensilability and the silage quality of some common herbs of permanent meadows were investigated. The following herbs were tested: Taraxacum officinale, Anthriscus sylvestris, Heracleum sphondylium, Ranunculus acer and Ranunculus repens. Plant material of the first and third cut was ensiled in laboratory silos. For comparison, the two grasses Lolium perenne and Dactylis glomerata as…
Plant production

Mosimann E., Troxler J.

Estimation of herbage yield based on sward height

Sward height measurements were made on a variety of Swiss grassland plots in 1997-98. Between values measured with a French and a New Zealand rising plate meter (RPM), very good correlation was found whereas it was less strong with ruler measurements. For two different grassland types, regression analysis was applied to estimate dry matter (DM)…
Food

Dufey P.-A.

Meat is a valuable dietary source of CLA

The conjugated linoleic acids (CLA) represent a group of natural isomers which are derived from linoleic acid. Because of their unique characteristics they exert chemical and physiological effects on the organism which differ from those of linoleic acid. In animal models as well as in in vitro models using tumour cells of human origin, they…
Agricultural economics

Tobias S., Weisskopf P., Schaub D., Marty P.

Chances of soil conserving tillage practices in Switzerland

The 7th report about agriculture of the Swiss Federal Council laid the foundations for a new ecological direction of Swiss agriculture. Additionally, the revision of the federal act on environment protection extended the legal measures of soil protection. Henceforth, physical and mechanical impacts that cause persistent damage of soil fertility must be avoided. In agriculture,…
Environment

Rüegg K., Lüscher A., Hartwig U.A., Nösberger J., Rüegger A.

Elevated atmospheric CO2 affects seed production of grassland species

Seed yield and quality of pure stands of five perennial grassland species were tested at elevated atmospheric CO2 (60 Pa) in a three year field experiment. Four species showed a trend to increased seed production, while Plantago lanceolata L. produced a reduced number of seeds. Tests on seed quality revealed that the germination rate was…