| Front page | | Contents | | Previous | | Next |

Effects of reduced pesticide use on flora and fauna in agricultural fields

Appendix E
Yield and vegetation in cereals

Appendix E.1.
Densities of weed species occurring with more than 5 plants per square meter after spraying in winter wheat (A) and spring barley (B) field trials. The maximal yield decrease (%) at reduced or zero dosages compared to yield at normal dosage is mentioned. In addition, the weed density for all species after spraying is listed as a mean for all treatments. Placement of the weed species on the line between strong and weak competitors is relative and based on data of crop equivalents from Wilson (1986), Wilson and Wright (1990), Jensen (1991, 1996) as well as the authors' knowledge about the species. Galium aparine is a very strong competitor even in small densities and are therefore always mentioned in the table. Each value is a mean of 12-16 plots.

Look here!
   

Appendix E.2.
Results from analyses of each field trial in spring barley and winter wheat. In addition the treatment intensity index, yield at normal dosage and weed density in spring are listed. Statistical significance of explanatory factors is indicated as follows: ns: p>0.10, +: 0.05£ p<0.10, *: 0.01£ p<0.05, **: 0.001£ p<0.01 and ***: p<0.001. Notice that non-sprayed plots were not included in the experiments in 1997.

Look here!

| Front page | | Contents | | Previous | | Next | | Top |