The text does not mention any specific problems with sweet potatoes.
The problems in sweet potatoes include deficiencies of nitrogen, sulphur, phosphorus, magnesium, potassium, calcium, and iron.
The problems in sweet potatoes include field troubles such as root and stem diseases, as well as storage rots.
The text does not mention any specific problems or issues related to sweet potatoes.
The text does not mention any specific problems with sweet potatoes.