STARCH PLANTS 89 



mostly at a depth of 30 to 45 cm. The arrowroot yields 

 the highest priced starch, but it produces much less of 

 it than do potato and maniok. 



If the useless part of the plant is left in the ground 

 after the harvest, this crop will exhaust the soil very 

 slowly. 



In what parts of plants is starch to be found? 



Name several starch plants that are to be found in the Philippines. 

 Which are the most important? 



What kind of soil does maniok require ? 

 How is maniok propagated ? 

 For what are potatoes grown in the Philippines? 

 What is a rhizome ? 



