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…
Nutrient recommendations for vegetables take into account the nutrient demand of the crop and soil analysis. Different methods are used to assess the nitrogen availability in the soil which varies in space and time. The nitrogen demand of vegetables is higher than the nitrogen uptake particularly on fields with a high level of productivity. To…
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…
“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,…
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…
Within the scope of the annual tractor tests on the motor test bench of the FAT, performance and consumption data as well as the waste gas components HC (unburned hydrocarbons), NOx (nitrogen oxides) and CO (carbon mo-noxide) are measured. The model developed on the basis of this data allows the calculation of the waste gas…
Within the scope of the introduction of Switzerland’s Agricultural Policy 2002, underlying conditions will change so that there will be pressing need for a large number of farms to take action. Model calculations involving a medium-sized mixed farm show that between 1996 and 2003, given a surface increase of 2 % and an adaptation of…
The agricultural income of the test farms of the Central Analysis of Accountancy Data de-creased significantly between 1990 and 1995. The income situation slightly recovered in 1996 and 1997. Taking the general price increase into account, however, the nominal income remains clearly below the level reached at the beginning of the nineties. Over the course…
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,…
The increasing pressure on production costs in Swiss agriculture requires a most efficient use of the cost intensive factor of labour. The research in the field of economy of labour of the FAT endeavours to make available the appropriate bases for decisions.
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…
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…
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…
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…
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…
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)…
In a feeding trial at the Swiss Federal Research Station for Animal Production (RAP), a total of 48 fattening pigs were given daily access (7 to 9 hrs) to an uncultivated plot infected with Ascaris suum eggs to investigate the influence of the parasitic exposure and subsequent infection on the amino acid requirements. Set up…
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…
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,…
Since 1992 an intensive (IS), an integrated (IP) and a low input (LI) farming system are compared on all arable plots of the Burgrain farm. The number of pesticide treatments in the integrated and the low input system was 63 % and 83 % lower than in the conventional, rather intensive farming system. Also the…
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…