The experimental layout followed a simplex design, where four species, timothy (Phleum pratense L.), smooth meadow grass (Poa pratensis L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) were sown in field plots in various combinations.
Fjórum tegundum, vallarfoxgrasi, vallarsveifgrasi, rauðsmára og hvítsmára var sáð í reiti.