1922 | 300,484,824| 11,602,219| 38.61 | 6.07 | 173,317,046| 57.68| 8,519,576| 73.43 | 49.16 ------+------------+-----------+--------+--------+------------+------+-----------+-------+--------- SECONDARY FOOD PRODUCTS.--Corn leads in importance among the secondary food products. In 1918 there were 1,035,067 acres grown to corn producing 11,269,258 bushels valued at $10,686,061. The other food crops worth mentioning under this heading are sweet potatoes, cassava, sesame, mongoes, peanuts, bananas, mangoes, citrus, lanzones, and a great number of tropical fruits and vegetables. Including the edible algæ and fungi there are more than 100 species of plants in the Philippines, either wild or cultivated, that find a place in the dietary system of the people. So rich is the country in food producing plants. PROSPECTIVE AGRICULTURAL INDUSTRIES.--The plants from which the various other tropical staple products in the world's markets are derived, such as rubber, coffee, tea, cacao, pepper, cinchona, and cassava are all known to thrive well in the Philippines, although the growing of those enumerated is yet of comparatively little importance. Rubber has the greatest future of these. The great Island of Mindanao, which is outside the typhoon zone, has been found to be suitable to the growing of rubber. All the large rubber plantations of the Philippines are located on Mindanao or the adjacent Island of Basilan. During the early years of American occupation, when the acreage planted to rubber in other countries increased by leaps and bounds, the erroneous impression somehow gained ground that the Philippines were unsuited to rubber. And it is not very many years ago that a planter was able to demonstrate beyond doubt that rubber could be grown in the Islands successfully. The company he heads now has some 80,000 rubber trees planted. The success of its operations has induced others to plant rubber, and while the Philippine output of rubber is still insignificant, it may be said that the rubber industry has come to stay.