Opportunity costs identify alternative returns on the assets deployed. This is important to get an accurate assessment of the profit margin attributable to the hemp crop. If you are unsure what to include, please check with your accountant.
Calculating water requirements is a challenge and is likely to become more so with anticipated changes to our climate. That said, we need to make provision for dry conditions to make the best out of the crop.
Soil moisture as well as temperature at sowing are significant. A soil moisture probe will help you decide how much to pre-irrigate. Be aware that the germination and early establishment phase are most vulnerable to over irrigating. Close monitoring is required during the first 6 weeks or so.
Managing what may be a scarce water resource is critical and requires that irrigation equipment is well maintained and operated at maximum efficiency.
The choice and application of any fertiliser must be based on a soil test together with advice from an experienced agronomist.
As a guide, hemp initially requires a similar nutrient profile as a Maize crop.
An agronomist can also advise on the best timing for both fertiliser and chemical applications. Note that fertiliser and chemical requirements may well change (reduce) with subsequent plantings so a soil test should be done each year. Crop yields can be expected to improve with experience.
Seeds sown at a consistent depth will give you the best chance of uniform growth and optimal results. Having the soil well prepared and irrigated are prerequisites for success.
Seed Selection
Select the seed variety to fit the purpose. Grain varieties will not grow much biomass, and biomass varieties will not grow much grain, so pick the variety that best suits your market. Also note that the hurd from grain varieties is generally of a lower quality compared with fibre varieties, hence the market price for the straw will also be less.
Germination percentages are essential to know so be sure to get a germination test result when making your seed purchase.
For consistent hurd quality we recommend that you have the seed graded by size and sow the smaller size separately from the larger size.
Planting Rate
Get expert advice to set the optimal space between plants. This will vary depending on variety and chosen crop type. Note that hemp has an auto toxicity factor and slower developing plants may be choked or killed off due to close proximity to stronger plants.
Soil Preparation
The surest way to have good germination is to have the soil prepared (tilled) so there is very good seed to soil contact. Hemp has very little vigour as a seedling so limit compaction as far as possible.
John Muir is a Development Agronomist and Industrial Hemp Consultant and offers an independent agronomy service to the industrial hemp industry across Australia.
John also has experience in tropical growing conditions, consulting for both grain and biomass.
He has presented on hemp cultivation at numerous workshops and seminars and contributed to the Agrifutures Best Management Practice Manual.
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“Supplying services and consultancy to a range of clients mostly related to Agriculture. Services are provided to both large organizations and one-on-one clients. One of my specialties is industrial hemp, providing agronomy and agribusiness advice. Co-author of the BMP Manual and Pesticide Review”
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Dr Omid Ansari is an accomplished agricultural expert with over two decades of experience in genetics, plant breeding, and agronomy, spanning both academia and the commercial sector. He has made significant contributions to the field of hemp research and production, demonstrating a remarkable balance between scientific advancements and business achievements.
Midlands Seed is primarily a seed production company based in New Zealand and Tasmania. We were instrumental in helping to kick start the NZ hemp industry in the early days and continue to be an integral part of that industry, growing crops and manufacturing hemp based products.
The Tasmanian operation has been producing hemp in Tasmania for over 12 years. Our Field Consultant, based in Tasmania, is Konrad Chung. With over 10 years of experience in the production of hemp for grain, Konrad provides advise to growers on nutrition, weed and pest control, irrigation, and timing for harvest of the grain. This experience has proven to be invaluable when guiding growers through the intricacies of dealing with different varieties of hemp from Canada and Europe, and how to prepare for the coming season in Tasmania.
Apart from hemp seed, Konrad also oversees the production of several other seed crops including pasture seeds, clover, field peas, canola and cereals with growers contracted to Midlands Seed.
Midlands is a provider of Certified Hemp Seed to growers for grain production. This seed is primarily imported from Canada, France and New Zealand. We have developed extensive relationships with overseas breeders which allows us to carry out extensive trial work on new varieties, to select the best ones suited to different climates and conditions. As well as providing sowing seed, Midlands is also a wholesale supplier of bulk, food grade, grain for supply into the various food markets across Australia and overseas.
More information can be found at https://www.midlandsnz.com/seed-au
Konrad can be contacted – konrad.chung@midlands.co.nz.
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