To study the manganese content of cereals, lupin and clover herbage in NE Victoria.

• Chlorotic and stunted wheat was found to have higher shoot manganese content than healthy plants in the same fields • High values were sometimes associated (correlated) with soil acidity and sometimes with waterlogging.
• In experiments, direct drilling resulted in lower manganese content of wheat, while what following lupin had higher manganese than wheat following wheat.
• Application of lime (0, 2.5 and 5 t/a) to an acid soil (pH 5) reduced the manganese content of wheat from 373, to 135 and 191 ppm respectively.
• On soil from a problem paddock near Rutherglen, application of ammonium sulphate nearly doubles manganese content of Olympic but not Egret wheat, while calcium nitrate reduced manganese in both cultivars.