No. 1, July, 1920J SOIL SCIENCE 251 



L671. \\ urn, I'. 'i., \m> M i ■• Po Shin. The phosphate requirement of some Lower 

 Burma paddy soils. Mem. Dept. Agrio. India Chem. Ber. 5: 132 165. PI. i 8. 1919.— Fer- 

 tiliser experiments in pots on a number of soils from different parts of Lower Burma, India, 

 were made to determine the effect of phosphoric acid and nitrogen separately and combii, 

 Increased growth was produced from both acid phosphate and ammonium sulphate used sin; 

 The increase was much longer when the two wen; used together. Each of the soils responded 

 well to the treatment. Analyses made of soils from different regions show 1 hat those from 

 around Nyaunglebin ami Daiku are low in lime, and high in potash and phosphoric acid. The 

 soils of the Hlning valley along the Prome are high in magnesia, potash, and phosphoric acid 

 but low in lime. From the neighborhood of Taungoo and from the Pequ, Insein, and Hantha- 

 woddy districts the soils are poor in lime, potash, magnesia and phosphoric acid. It is stated 

 that most of these soils are neutral or acid, while the older soils are distinctly acid. A map 

 is given showing the soils of the regions, which are low and those which are high in phosphoric 

 acid. It is concluded that the lack of phosphoric acid is by no means general all over Lower 

 Burma, and that the deficiency is serious only within definite areas. Phosphoric acid fertil- 

 ization of soils deficient in phosphoric acid cannot increase crop yields without the addition 

 of nitrogen. — J. J. Skinner. 



1672. Wiancko, A. T. Commerical fertilizers for Indiana: What to use. Purdue Univ. 

 Agric. Exp. Sta. Circ. 92. 7 p. 1919.— Advice to farmers.— M. W. Gardner. 



1673. Voklcker, J. A. The Woburn Experimental Station of the Royal Agricultural Society 

 of England. Jour. Roy. Agric. Soc. England 79: 263-284. 1918— Under the heading of field 

 experiments are reported the 42nd year's results of the fertilizer experiments with the con- 

 tinuous growth of wheat and of barley. The ammonium sulphate plots in both series have 

 failed entirely as in former years. Wherever ammonium sulphate was used whether singly 

 or with other mineral fertilizers the yields are decreased. Where lime has been used the 

 ammonium sulphate has given good yields. The largest yield in the wheat series was secured 

 with mineral fertilizer and sodium nitrate. In the grass experiments largest yields were 

 secured with basic slag and potassium sulphate. Under the head of pot culture experiments are 

 reported the results of work with iron compounds on wheat. The magnetic oxide (Fe 3 4 ) 

 has a slightly stimulating influence. Ferrous chloride (FeCl 2 ) has a markedly beneficial effect 

 when not exceeding 0.1 per cent of iron in the soil, it is harmful in larger amounts. Ferric 

 chloride proved decidedly toxic and prevented growth if present to the extent of 0.2 per cent 

 iron in the soil. Experiments are reported to show, the time of applying of ammonium sul- 

 phate for best results, the effect of various phosphate and lime materials, no conclusive results 

 were secured. — J. J. Skinner. 



SOIL CLASSIFICATION 



1674. Beck,M. W., axdO. P. Gossard. Soil survey of Mahoning County, Ohio. Advance 

 sheets— field operations Bur. Soils, U. S. Dept. Agric. 1917: 5-41. Fig. 1, and map. 1919. — 

 Mahoning County is drained by the Mahoning River and has a general northward slope. 

 Lying as it does in northeastern Ohio, against the Pennsylvania line, it is entirely within 

 the glaciated region and its soils are either glacial or alluvial in origin. — Youngstown is the 

 county seat and one of the best markets in Ohio. Its population is 125,000 which is four times 

 the rural population of the county. The area is well supplied with railroads. It has a large 

 mileage of improved highways and its dirt roads receive constant attention. — The rainfall aver- 

 ages 3S inches and is evenly distributed. The winters are long but only moderately severe. 

 The summers are not excessively hot. — The upland soils are glacial till and cover 93 per cent 

 of the area. The light glacial material is classified as Woostt r. Where bed rock occurs at 

 3 feet or less the series is Lordstoicn. With progressively poorer drainage Canfidd, — 

 Volusia and Trumbull series are recognized. Of the thick till overlying the shale of the north- 

 ern and western part of the county the Ellsworth is found in the best drained areas and the 

 Mahoning in the poorly drained portions. The terrace and alluvial soils are not of great im- 

 portance except locally. Some areas of muck occur which are desirable for trucking. In gen- 

 eral the soils of the county are productive but need lime, organic matter and drainage. — On 



