Farm Table says:
Nutrition For Crops After Low Yielding Seasons – Assessing Soil Stores And Input Decisions For Best Returns Based On Field Trial Data
The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.
Key messages from the paper include:
- Residual nutrients are difficult to ascertain at modern crop input rates on many soils and make relatively low contributions to yield in comparison to new season applications.
- Soil testing and analysis is important to identify responsiveness but benchmark values are not “critical” as their name suggests and require careful consideration.
- There is false economy in cutting back or neglecting nutrients at sowing, especially P for cost saving or shifting to in-season N spending.
- Rather than only adding to the cost side of the equation, additional nutrition improves the productivity and profit gains from soil amelioration.