31 



heavier types of clay, silt, and alluvial soils, particularly when they 

 contain a liberal amount of humus. The soils must, however, not 

 be so located that they can not be thoroughly drained, as good crops 

 can not be produced where stagnant water is present in the soil. Soils 

 of a lighter character will produce good crops of cane when supplied 

 with abundant humus and fertilizer if there is liberal and constant 

 rainfall or irrigation is provided. There is no doubt that the best 

 type of soil for growing cane in the Philippines occurs in the Province 

 of Occidental Negros and in isoLited places in Oriental Negros, as 

 described by Mr. Herbert S. ^Yalker in his bulletin, "The Sugar In- 

 dustry in the Island of Negros." There are also excellent sugar soils 

 in limited amounts throughout the Islands, particularly the black 

 volcanic lands around Laguna de Bay, the red clay lands of Batangas 

 Province, and the dark clay loam soils of Mindanao. The sandy level 

 land of the Province of Pampanga is a very poor type of sugar soil, 

 especially in view of the fact that the growers there use neither fertil- 

 izers, irrigation, nor modern methods of culture. Below are given 

 sample analyses by the Bureau of Science of soils taken in several parts 

 of the Islands outside of Negros. 



Chemical analyses. 



10 



San Francisco de Malabon: 



Fir.st class 



Second c1ms.s 



Buena Vista 



Imus, Cavite: 



First class 



Second class 



Dasniiirinas, Cavite 



SingalonR, Manila 



Biiirtn, liagnna - 



BaUtsan, Panay: 



Surface soil 



Sub.soil 



Calainba Estate: 



Surface soil 



Subsoil 



San Fernando, Pampanga: 



Surface soil 



Sub.soil 



Stotsenbnrg, Pampanga: 



Surface soil 



Subsoil 



Magalong, Pampanga: 



Surface soil 



Subsoil 



San Miguel, Tarlac: 



Surface soil 



Subsoil 



Moisture. 



Vola- 

 tile 

 matter. 



4.98 

 8.46 



8.73 

 8.73 

 9.68 

 2.61 



4.34 

 4.24 



9.785 

 13.03 



4.91 

 6.59 



3.20 

 4.14 



1.25 



2.08 

 2.71 



11 48 

 8.06 

 11.12 



11.79 



10 90 



11.00 



3.45 



7.34 



6.76 

 5.84 



11.705 

 11.17 



6.39 

 6.60 



6.25 

 6.33 



3.96 

 1.77 



3.38 

 3.53 



Potash L„ f., 



0.15 I 0.52 



.19 . 25 



.19 .34 



.14 I 



.11 



i 



.345 j 



.33 I 



.443 j -. 



.194 I 



1 



.063 j 



.060 I 



.095 



.112 1 



.095 I 



.043 1 



Nitro- 

 gen. 



0.11 

 .14 



.07 



.14 



.10 



.10 



.073 



.15 



.ld9 

 .203 



.296 

 .243 



.106 

 .075 



.111 

 .077 



.073 

 .054 



.095 

 .054 



