Phosphorus deficiency

Leaflets dull bluish green; small bronze spots distributed over surfaces.

Magnesium deficiency

Central intervenal chlorosis and reddish brown marginal bands.

Potassium deficiency

Chlorotic spotting marginal areas, followed by marginal scorching.

Iron deficiency

Younger leaves strongly chlorotic.

Manganese toxicity (soil acidity complex)

Young leaflets, margins chlorotic followed by fine brown spotting and scorching.

Boron deficiency

Stem thickened and stiff; growing point killed, and young growths distorted; older leaves, marginal aeas high purple and red tints.

Calcium deficiency

Young stems, petioles and pedicels wilt and collapse; leaves chlorotic and scorched margins.

Magnesium deficiency

Central intervenal chlorosis and green marginal band which later scorches and turns brown.

Potassium deficiency

Margins of leaflets white spots forming "hatched" pattern; spots later form brown areas.

Boron deficiency

Sten thickened and stiff; growing points die; leaves bright red tints and scorched margins.

Magnesium deficiency

Central intervenal chlorosis, margins green in early stages.

Potassium deficiency

Leaflets chlorotic spots around tips and margins, followed by general chlorosis of spotted areas.

Boron deficiency

Younger leaves strong yellow and red tinting; growing points die. ("Alfalfa Yellows")