Volume 11,Issue 4,1963 Table of Contents
1963, 11(4):343-360.
Abstract:
Засоленные почвы на Севро-китайской равнине образовалисъ под действием капилярного поднятия минералъных грунтовых вод боковой филътрации застойиыхвод.
Засоленные почвы на Севро-китайской равнине образовалисъ под действием капилярного поднятия минералъных грунтовых вод боковой филътрации застойиыхвод.
1963, 11(4):361-369.
Abstract:
Eighteen samples of paddy soils developed on red earth, alluvial and lacustrine deposits and Hsiasu loam (a heavily leached loess deposit) were collected from Kwantung, Kwansi, Kiangsi and Kiangsu provinces. They possess pH value from 5.4 to 8.0 and are of different fertility. Fractionations of soil mineral phosphate were conducted according to Chang and Jackson's scheme. Analytical results revealed that iron phosphate, most of which are coated with ferric oxide, predominate in paddy soils of acid and neutral reaction.
Eighteen samples of paddy soils developed on red earth, alluvial and lacustrine deposits and Hsiasu loam (a heavily leached loess deposit) were collected from Kwantung, Kwansi, Kiangsi and Kiangsu provinces. They possess pH value from 5.4 to 8.0 and are of different fertility. Fractionations of soil mineral phosphate were conducted according to Chang and Jackson's scheme. Analytical results revealed that iron phosphate, most of which are coated with ferric oxide, predominate in paddy soils of acid and neutral reaction.
1963, 11(4):370-381.
Abstract:
Работа посвящена изучению пяти более типичных почв тропического пояса юогозападной части провинции Юнънанъ.
Работа посвящена изучению пяти более типичных почв тропического пояса юогозападной части провинции Юнънанъ.
1963, 11(4):382-394.
Abstract:
При выделении разных групп микроагрегатов в карбонасных почвах нашей модификацей метода проф, А. Ф.
При выделении разных групп микроагрегатов в карбонасных почвах нашей модификацей метода проф, А. Ф.
1963, 11(4):395-404.
Abstract:
В районах гуанъчжун годовое количество осадков колеблется от 500、ло 700 мм.
В районах гуанъчжун годовое количество осадков колеблется от 500、ло 700 мм.
1963, 11(4):405-410.
Abstract:
The presence of concomitant bacteria on the capsular surface of obtaining pure cultures of Azotobacter from the cultivated soils introduced difficultied of Canton. Concomitant bacteria associated with Azotobacter include Pseudomonas azotogensis, Azotomonas insolita, Pseudomonas flourescens and Pseudomonas sp., Pseudomonas axotogensis, also a kind of nitrogen-fixing bacteria, are found is most cultivated soils in Canton, and are present in a larder number than Axotobacter.
The presence of concomitant bacteria on the capsular surface of obtaining pure cultures of Azotobacter from the cultivated soils introduced difficultied of Canton. Concomitant bacteria associated with Azotobacter include Pseudomonas azotogensis, Azotomonas insolita, Pseudomonas flourescens and Pseudomonas sp., Pseudomonas axotogensis, also a kind of nitrogen-fixing bacteria, are found is most cultivated soils in Canton, and are present in a larder number than Axotobacter.
1963, 11(4):411-416.
Abstract:
Present study reveals that divergency on the formation of clay minerals, as a result of bio-climatic function, occurs also in young soils derived from limestone in south-western China with incipient profile development. Illite predominates in rendzinas. Large quantities of vermiculite have been found in the upper part of terra fusca profiles. Kaolinite-gibbsite-vermiculite are the characteristic clay minerals of terra rossa soils.
Present study reveals that divergency on the formation of clay minerals, as a result of bio-climatic function, occurs also in young soils derived from limestone in south-western China with incipient profile development. Illite predominates in rendzinas. Large quantities of vermiculite have been found in the upper part of terra fusca profiles. Kaolinite-gibbsite-vermiculite are the characteristic clay minerals of terra rossa soils.
1963, 11(4):417-425.
Abstract:
Pot culture and field experiments on the effect of B, Mn, Mo, Zn and Cu to the growth and yield of soybean were conducted on some important soil types of North-eastern China in 1955-1958.
Pot culture and field experiments on the effect of B, Mn, Mo, Zn and Cu to the growth and yield of soybean were conducted on some important soil types of North-eastern China in 1955-1958.
1963, 11(4):426-432.
Abstract:
В настоящей работе разрботана техника изготовления почвенных шлифов с ненарушенными образцами.
В настоящей работе разрботана техника изготовления почвенных шлифов с ненарушенными образцами.
1963, 11(4):433-436.
Abstract:
Invertase activity of the soil is generally estimated from the concentration of the invert sugar through by drolysis of sucrose by the invertase. Owing to the presence of soil organic matter, the coloration of soil solution usually introduces interference is polariscopic, colorimetric, and ordinary titration methods. Present investigation suggests the adoption of Tryller's potentiometric titration method provided with a magic eye for determining invertase activity. Determinations were made on agricultural soils grown wheat, sweet potatoes and onion. Results showed that activity of invertase varies with the kinds of chemical fertilizers applied and also with the depth of soils.
Invertase activity of the soil is generally estimated from the concentration of the invert sugar through by drolysis of sucrose by the invertase. Owing to the presence of soil organic matter, the coloration of soil solution usually introduces interference is polariscopic, colorimetric, and ordinary titration methods. Present investigation suggests the adoption of Tryller's potentiometric titration method provided with a magic eye for determining invertase activity. Determinations were made on agricultural soils grown wheat, sweet potatoes and onion. Results showed that activity of invertase varies with the kinds of chemical fertilizers applied and also with the depth of soils.
