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SUBJECT: abandoned areas; physical property; soil losses; mixed forests; soil chemicophysical properties

SUBJECT: perfil del suelo; tipos de suelos; propriete physicochimique du sol; reconocimiento de suelos; genesis del suelo

SUBJECT: abandoned areas; physical property; soil losses; mixed forests; soil chemicophysical properties

Soil deterioration in the Valle del Cesar has generated a gradual reduction of livestock in their productive response to pastures. That effect has been more intense in areas managed under a grass monoculture. As an alternative, an integration of agricultural, forest, and livestock production systems is proposed as an strategy for improving both environment preservation and production. The purp ...

SUBJECT: soil sickness; système sylvopastoral; rehabilitación de tierras,recuperación de tierras,recuperación de suelos; 土壤病害; silvopastoral systems

POSTED TO: Revista CORPOICA. Ciencia y Tecnología Agropecuaria [0122-8706]

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By analysis of publications dealing with world history of development of different soil textural classifications, and methods of transfer therebetween, own research concerning conversion of classes is also presented, it is proved that at the presence of full test results of the Kachinsky’s soil texture test it becomes possible to calculate the contents of the necessary but undeterminable textu ...

SUBJECT: physique du sol; 土壤结构; soil structure; 土壤化学; بنية التربة

POSTED TO: Агрохімія і ґрунтознавство. Міжвідомчий тематичний науковий збірник [0587-2596]

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SUBJECT: land management; ecologie; ecologia; mathematical models; brandenburgo

POSTED TO: Oekologische Hefte der Landwirtschaftlich-Gaertnerischen Fakultaet, Humboldt-Universitaet, Berlin (Germany)

SUBJECT: soil air; soil structure; aire del suelo; movement in soil; aggregates

The conference aimed to exchange the experience and study results concerning changes which occur in soil environment due to intensive cultivation. The evaluation of soil degradation forms is the basis and starting point for implementing the principles of stable and balanced agriculture. Session papers concern tendencies of organic matter transformation in cultivated soils, evaluation of change ...

SUBJECT: heavy metals; utilizacion de la tierra; poland; residues; biologie du sol

POSTED TO: Zeszyty Problemowe Postepow Nauk Rolniczych (Poland) [0084-5477]

The rhizobial populations and nodulation status of both indigenous (mainly Acacia species) and some introduced woody legume species were assed under glasshouse conditions in soils collected from 12 sites located in defferent ecological zones of Kenya. The soils were collected on 6 dates spanning a period of 3 years (1989-1992) and at least once every year covering wet and dry seasons.

SUBJECT: ecologie; substratos de cultivo; muestreo; ecologia; regime thermique du sol

POSTED TO: Plant Nutrition