Potassium deficiency-Rice

Symptoms
Dark green plants with yellowish brown leaf margins and/or dark brown necrotic spots first appear on the tips of older leaves (K is very mobile within the plant and is retranslocated). Leaf wilting, rolling and early senescence may occur. Higher susceptibility to pests and diseases. Large percentage of sterile or unfilled spikelets.

Reasons
Potassium deficiency ('Pansukh disease' in Punjab). K deficiency may be caused by - low soil K-supplying capacity - complete removal of straw - high soil K-fixation capacity - leaching losses - wide Na:K, Mg:K, or Ca:K ratios in soil, and sodic/saline conditions - higher K demand of hybrid rice

Symptoms
Dark green plants with yellowish brown leaf margins and/or dark brown necrotic spots first appear on the tips of older leaves (K is very mobile within the plant and is retranslocated). Leaf wilting, rolling and early senescence may occur. Higher susceptibility to pests and diseases. Large percentage of sterile or unfilled spikelets.

Reasons
Potassium deficiency ('Pansukh disease' in Punjab). K deficiency may be caused by - low soil K-supplying capacity - complete removal of straw - high soil K-fixation capacity - leaching losses - wide Na:K, Mg:K, or Ca:K ratios in soil, and sodic/saline conditions - higher K demand of hybrid rice

Symptoms
Dark green plants with yellowish brown leaf margins and/or dark brown necrotic spots first appear on the tips of older leaves (K is very mobile within the plant and is retranslocated). Leaf wilting, rolling and early senescence may occur. Higher susceptibility to pests and diseases. Large percentage of sterile or unfilled spikelets.

Reasons
Potassium deficiency ('Pansukh disease' in Punjab). K deficiency may be caused by - low soil K-supplying capacity - complete removal of straw - high soil K-fixation capacity - leaching losses - wide Na:K, Mg:K, or Ca:K ratios in soil, and sodic/saline conditions - higher K demand of hybrid rice