3Phase fertiliser program for broccoli on sandy soils

Page last updated: Wednesday, 19 October 2016 - 7:21am

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Nitrogen application benchmarks

Figure 5 shows the levels of nitrogen that give maximum yield over the life of a broccoli crop grown on the sandy soils of the coastal plain. The totals are reported according to planting time.

Nitrogen application benchmarks for the life of a crop in kg/ha according to the time of planting
Figure 5 Nitrogen application benchmarks for the life of a crop in kg/ha according to time of planting

If your fertiliser applications exceed those outlined in Figure 4 and Table 1, you are applying too much and losing an unacceptable quantity of nutrient to the environment. Future research is expected to lower these benchmarks even further.

Table 1 Maximum application rates for nitrogen over life of the crop

Month

Total nitrogen (kg/ha)

January

342

February 1

342

February 2

336

March

336

April 1

396

April 2

426

May

510

June

510

July 1

510

July 2

510

August

420

September 1

396

September 2

366

October 1

336

October 2

342

November

342

December

342

Don’t forget trace elements. Maintenance of soil pH with regular soil testing, liming as required and use of supplementary calcium and magnesium products to provide adequate calcium and magnesium.

An annual broadcast application of complete trace elements is good practice for all crops grown in rotation, while a fertigated application of borax at 15kg/ha at row closure is recommended as a precaution against boron deficiency.

Acknowledgement

Dennis Phillips was an author of the original version of this material.

Contact information

Rachel Lancaster
+61 (0)8 9780 6210