Which soil is best suitable for growing Castor?

Castor crop can be grown on a wide range of soils, provided they are fairly deep and well drained. Heavy clays with poor drainage and marshy soils are not suitable for castor crop. The suitable soils for castor are deep, moderately fertile, with slightly acidic conditions pH level of 5.0 to 6.5. Though, excessively fertile soils are not desirable, as they favor excessive vegetative growth at the expense of seed yield. Castor crop does well in the soil which is not for valuable commercial crops.