When is the best time to apply topdressing to sorghum?
When is the best time to apply topdressing when growing sorghum? Please give guidance. Sorghum: To meet the nutrient needs of sorghum from the jointing stage to the heading stage, the first topdressing should be applied at the jointing stage, applying 150-225 kg of ammonium nitrate or 120-180 kg of urea per hectare; at the booting flag-leaf stage, a second topdressing should be applied, applying ammonium nitrate per hectare...

When is the best time to apply topdressing when growing sorghum? Please give guidance.
Sorghum: To meet the nutrient needs of sorghum from the jointing stage to the heading stage, the first topdressing should be applied at the jointing stage, applying 150-225 kg of ammonium nitrate or 120-180 kg of urea per hectare; at the booting flag-leaf stage, a second topdressing should be applied, applying 120 kg of ammonium nitrate or 75 kg of urea per hectare.
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