Abstract
Harvest weed seed control (HWSC) is a regime of management practices that aim to prevent weed seed movement into the seed bank at harvest. Some HWSC practices target the chaff and straw fraction whilst others only the chaff fraction. To evaluate the impact of these systems on nutrient removal, wheat
chaff and straw fractions collected during harvest were analysed to determine the amount of major nutrients (N, P, K and S) contained in these fractions. HWSC practices targeting both straw and chaff removed 8.0 kg of K, 4.7 kg of N, 0.6 kg of S and 0.3 kg of P per tonne of grain harvested. In contrast, systems targeting only the chaff fraction removed 1.1 kg of K, 2.3 kg of N, 0.2 kg of S and 0.1 kg of P
per tonne of grain. The removal of nutrients from cropping fields by HWSC systems is often a cost that is not considered when comparing HWSC systems.
chaff and straw fractions collected during harvest were analysed to determine the amount of major nutrients (N, P, K and S) contained in these fractions. HWSC practices targeting both straw and chaff removed 8.0 kg of K, 4.7 kg of N, 0.6 kg of S and 0.3 kg of P per tonne of grain harvested. In contrast, systems targeting only the chaff fraction removed 1.1 kg of K, 2.3 kg of N, 0.2 kg of S and 0.1 kg of P
per tonne of grain. The removal of nutrients from cropping fields by HWSC systems is often a cost that is not considered when comparing HWSC systems.
| Original language | English |
|---|---|
| Title of host publication | System Solutions for Complex Problems |
| Subtitle of host publication | Proceedings of the 20th Australian Agronomy Conference |
| Editors | L Bell, B Chauhan |
| Publisher | Australian Society of Agronomy |
| Number of pages | 4 |
| Edition | 2022 |
| Publication status | Published - 2022 |
| Event | 20th Australian Agronomy Conference - Empire Theatre, Toowoomba, Australia Duration: 18 Sept 2022 → 22 Sept 2022 https://web.archive.org/web/20240603103809/https://agronomyconference.com/2022-conference/ (Conference website ) https://www.agronomyaustraliaproceedings.org/index.php/2022 (Proceedings) |
Conference
| Conference | 20th Australian Agronomy Conference |
|---|---|
| Abbreviated title | System solutions for complex problems |
| Country/Territory | Australia |
| City | Toowoomba |
| Period | 18/09/22 → 22/09/22 |
| Other | The theme of the conference is System Solutions for Complex Problems. The theme underpins the need to strengthen collaborations between practitioners and researchers from a wide range of disciplinary backgrounds to address increasingly complex problems and uncertainties. So, the question is not If, but when and how, multidisciplinary collaborations will be developed. The 20th Australian Agronomy Conference will feature leading international and national speakers addressing issues such as the need to foster soil biology for enduring profitability, carbon sequestration, herbicide resistance, and the interwoven relationships between food production, energy and the environment. We will discuss and share our latest research findings amongst circa 300 agronomists from Australia and the world, as well as farmers, consultants, agribusinesses and farmer peak bodies. |
| Internet address |
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