Interpretation of Brassicas leaf nutrient analysis

Brassica crops are noted for their susceptibility to deficiences of nitrogen, boron and molybdenum and, increasingingly, sulphur. Both yield and marketable quality can be affected by these and other nutrient deficiencies. If the nutritional status is below the 'critical level', visual symptoms will be present in the field. In the absence of visual symptoms, 'subclinical' deficiencies or toxicities may be present which will reduce growth and subsequently yield.

The factsheet aims to:

  • Assist with the diagnosis of the most common visual deficiency symptoms
  • Provide guidance on sampling plants so that meaningful results are obtained
  • Provide guidance on interpreting lead tissue analysis results 
  • Provide information on managing nutrient deficiencies.

This information was last updated in 2005.