| 期刊全称 | Advances in Soil Science | | 期刊简称 | Volume 3 | | 影响因子2023 | B. A. Stewart | | 视频video | | | 学科分类 | Advances in Soil Science | | 图书封面 |  | | 影响因子 | The world population in 1930 was 2 billion. It reached 3 billion in 1960, stands at 4. 6 billion today, and is expected to reach 6 billion by the end of the century. The food and fiber needs of such a rapidly increasing population are enormous. One of the most basic resources, perhaps the most basic of all, for meeting those needs is the Soil. There is an urgent need to improve and protect this resource on which the future of mankind directly depends. We must not only learn how to use the soil to furnish our immediate needs, but also ensure that the ability of the soil to sustain food production in the future is unimpaired. This is indeed a mammoth task; a 1977 United Nations survey reported that almost one-fifth of the world‘s cropland is now being steadily degraded. The diversity of soil makes it necessary for research to be conducted in many locations. There are basic principles, however, that are universal. This series, Advances in Soil Science, presents clear and concise reviews in all areas of soil science for everyone interested in this basic resource and man‘s influence on it. The purpose of series is to provide a forum for leading scientists to analyze and summarize the av | | Pindex | Conference proceedings 1985 |
| 1 |
Front Matter |
|
|
Abstract
|
| 2 |
,Quantitative Spatial Analysis of Soil in the Field, |
R. Webster |
|
Abstract
Soil scientists have recognized variation in soil from place to place for many years. They have portrayed the variation by dividing large regions into smaller parcels each of which is relatively homogeneous, and they have classified the soil to show similarities between soil in widely separated parcels. This procedure, which may be regarded as standard soil survey practice, requires appreciation of the scale of change, the abruptness or otherwise of change, the degree of correlation among different soil properties, and of relations in the landscape. Yet that appreciation has almost always been intuitive. Good soil surveyors have needed flair. Rarely have they gained their appreciation by quantitative analysis.
|
| 3 |
,The Effect of Green Manuring on the Physical Properties of Temperate-Area Soils, |
R. J. MacRae,G. R. Mehuys |
|
Abstract
Green manuring has received little attention by the research community in the past few decades. But with renewed concern about our soil resources, particularly soil degradation, green manuring is increasingly appealing as a means to reduce losses of soil organic matter, compaction, and soil erosion and still maintain economic returns. Recent attempts to reevaluate the usefulness of green manures have been hindered by a lack of readily available and current information. This paper attempts to compile and synthesize what information is presently available.
|
| 4 |
,The Influence of Macropores on the Transport of Dissolved and Suspended Matter Through Soil, |
R. E. White |
|
Abstract
This article is concerned with the predominantly vertical movement of water through soils that to some degree have a network of large channels (macropores) and the consequences of this movement for the convective transport of solutes and suspended matter. Beven and Germann (1982) have reviewed the experimental evidence indicating that infiltration and redistribution of water in soils containing macropores are not adequately described by theories that treat the soil as a homogeneous medium conforming to Darcian principles of water flow. Such theories, developed for the mixing of solutions in hallow tubes (Taylor, 1953) and porous rock strata (Brigham et al., 1961), have been applied to miscible displacement experiments with columns of sand, resins, glass beads, or finely sieved and repacked soil. The underlying assumptions are that an unreactive solute moves through the medium at the same velocity as the water and all the analysis and interpretation of these experiments have been reviewed several times (Gardner, 1965; Biggar and Nielsen, 1967; Biggar and Nielsen, 1980; Wagenet, 1983) and will not be repeated here.
|
| 5 |
,Behavior of Herbicides in Irrigated Soils, |
B. Yaron,Z. Gerstl,W. F. Spencer |
|
Abstract
The primary function of herbicides is to protect agricultural crops from infestation with weeds and to prevent arable land from being overgrown by plant cover indigenous to the ecosystem. The chemicals known as herbicides are mainly synthetic organic compounds with broad molecular configurations having as a common property the ability of selectively killing or inhibiting the growth of plants. A selective herbicide retards growth or kills one plant species (the weed), whereas another plant species (the crop) is unaffected by the same treatment
|
| 6 |
Back Matter |
|
|
Abstract
|
|
|
发表于 2025-3-21 18:27:34
