Many arable growers will be considering the option of including protein crops in their rotation as the pilot Protein Crop Scheme enters its second year.
A number of growers grew these crops for the first time in 2021 in response to the support from the scheme. To assist, the College of Agriculture, Food and Rural Enterprise (CAFRE) crops adviser, Iain Johnston, says that the “timing of drilling varies for the different protein crops and it is important to get it right”.
The most widely grown protein crop was spring beans which represented over 90% of scheme applications. Early drilling is important for success with this crop in local conditions.
Growers planning to grow spring beans again, or for the first time in 2022, are advised to order seed as soon as possible to ensure the crop can be drilled early. Spring beans drilled in March last year consistently harvested earlier and yielded better than those drilled later in April.
Johnston advises to “aim for a spring bean plant population of 30-35 plants/m2, assuming 90% germination and 5% field losses, plant 35-40 seeds/m2 to achieve this. Thousand Seed Weight can vary greatly between seed batches, so calculate your seed rate using these figures”.
The target drilling date for pea and lupin crops will be later, however with lower areas of these crops being grown, ordering seed early is still advised as merchants are less likely to carry stock of these and will require time to source supplies.
For peas, drill in late April to early May and aim for a plant population of 65-70 plants/m2. For lupins, the target plant population will vary depending on the variety being sown. Consult your seed supplier for this information when ordering seed.
Johnston says that “all protein crops will benefit from being sown in soils which are in good condition, without compaction, with adequate soil indices for phosphate and potash and a pH of 6.5.”
You should also contact your local BASIS qualified agronomist to plan weed and disease programmes, as early intervention is essential to achieve the desired results.
LSL News.