Nutrition in Wheat - In Crop
Constraint – Molybdenum
Molybdenum is the least available micronutrient
Molybdenum forms an essential element in nitrogen fixing enzymes, as well as being directly involved in nitrogen metabolism and the electron transfer system
Chlorosis of older leaves
Green/grey/white nodules on legumes
In severe cases, most if not all plant growth is affected
- Yield penalty is generally not significant
A soil test or a plant tissue test should be used to confirm molybdenum deficiency. Maintenance of soil pH above 5.5 will act to increase the available molybdenum in the soil, as well as application of 50-60 g Mo/ha every 5-7 years on responsive soils.
Links and Resources
DEPI VIC - What nutrients do plants require? Molybdenum
6.4.1. Plant use, symptoms, management and control, and animal health implications. Page last updated 2013.
DPI NSW - AGfact
Plant use, symptoms, deficient areas and soils, diagnosis of deficiency, and control measures. POublished 1984, reviewed 2004.