Potassium deficiency-Soya bean

อาการ
Beginning on older leaves, numerous small brown spots give the plant a mottled appearance. Furthermore, the blotches expand and coalesce to irregularly shapened, light brown necrosis.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time. As the yellowing progresses towards the leaf base, there appear brown marginal necroses.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time. As the yellowing progresses towards the leaf base, there appear brown marginal necroses. They may drie off and form a necrotic seam all along the leaf edge.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time. As the yellowing progresses towards the leaf base, there appear brown necrotic spots in the marginal area.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Already far advanced chlorosis. The leaf is almost completely bleached, only the midrib and the adjacent area are still green. As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.

อาการ
Already far advanced chlorosis. The leaf is almost completely bleached, only the leaf base, the midrib and its adjacent area are still green. As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area. Leaves are bent down.

เหตุผล
Potassium deficiency Large amounts of K are necessary for adequate nutrition of soybeans.