Key Points
- Determination of optimum sowing rates requires knowledge of TGW, germination %, expected field emergence % and desired plant population.
- The TGW & germination values should be available on the bag label of certified seed. Field emergence information is available from a cold stress or a vigour test.
- Target plant populations for April sown wheat is 100-125plants/m2, May sown wheat 100150plants/m2, June sown wheat 200plants/m2 and September sown wheat 300plants/m2.
- Target plant populations for May sown barley is 150-200plants/m2.