Pale spots and dead grey streaks on young oat and wheat leaves on my sandy soil, manganese?

Pale interveinal areas on the young leaves of cereals with grey to brown dead spots and streaks, worst on sandy high lime ground, most likely indicates manganese deficiency. Manganese is immobile, so it strikes the new growth, and in cereals the grey speck or streak appearance between green veins is fairly typical. It is common on sandy soils, high pH and over-limed soils, and peaty soils. The catch is that manganese deficiency looks a lot like iron deficiency, and the dead spots can be mistaken for a leaf disease, so please confirm with a tissue test or soil test before treating rather than guessing from the leaf. If manganese is confirmed, the practical correction is a foliar spray of manganese sulphate, often around a 0.5 percent solution sprayed once or twice on the new growth, because soil manganese is quickly locked up again on high pH soils. Adjust the concentration and sprays to your crop and local KVK advice, and do not over-apply.