Vízügyi Közlemények, 1935 (17. évfolyam)

Kivonatok, mellékletek - Kivonat a 2. számhoz

18 The rice production in the Philippine Islands is generally the same as in Japan. A special method of cultivation is employed in the Island of Luzon, where the rice is grown on terraces. This special method is shown in photos 17—23. In the U. S. A. rice production is of recent origin. In 1927 eight million quintals were produced on a total area of 409,000 hectares. There use is made of the latest experience, and modern machines are employed. III. RICE PRODUCTION IN JAVA. By E. ZBORAY. (Pages 216—222.) In Java rice is the main food of the native population. Its production is regarded as a religious rite. The method of rice-growing is shown in photos 1—21. The rice-fields extend from the lowest-lying lands to the highest peaks of mountains. The slopes have been terraced and thousands of canals constructed by the inhabitants by marvellous instinct, without applying any engineering science or formulae. Nowhere is there any fault to be found ; every canal carries exactly as much water as is required. Recently the Dutch have endeavoured to train the inhabitants to modern methods of cultivation, but these attempts have met with but little success, owing to the conservative disposition of the people. IV. FORMER HYDROGRAPHIC CONDITIONS OF THE LOWLAND BASIN OF THE ZAGYVA RIVER. By Dr. F. FODOR. (Pages 223—237.) Legend in the map annexed to the article : A Jászság rekonstruált vízrajzi térképe = reconstructed hydrographie map of the Jász District. Mai élővízfolyások = watercourses of to-day. Hajdani vízfolyások = watercourses of yore. Hajdani vízállások = marshes of yore. Régi árkok = old canals. A Jászság történelmi határa = historical boundary of the Jász District. Kun-halmok = hills of the Kun-tribe (Only in the Jász District). All around the edge of the Hungarian Great Plains there are small depressions, which probably represent rim-collapses. Such a small rim-collapse is situated at the foot of the Mátra Mountains, through which the Zagyva river flows. This is not only a basin in the morphologic sense of the word ; its structure shows it to be a collapse. It seems to be provable that the local sinking of this basin is still going on. In consequence of this sinking all the rivers have been turned into the same direction, and many abandoned river beds can be observed in the western and eastern borders of the basin. Generally speaking, the fixed points of the levelling survey