Download Physical Methods in Agriculture: Approach to Precision and by Miroslav Kutílek (auth.), Jiří Blahovec, Miroslav Kutílek PDF

By Miroslav Kutílek (auth.), Jiří Blahovec, Miroslav Kutílek (eds.)

The frrst makes an attempt to take advantage of actual equipment in agriculture are available in 19th century as an important section of farm and nutrition equipment. there have been mechanics, electrical energy and actual chemistry that have been the 1st actual disciplines utilized in agriculture and foodstuff undefined. within the related period of time the reports on actual houses of soils began to be one in all major themes of soil technological know-how. the 20th century was once a century of study on actual homes of agromaterials. The actual homes of agromaterials were studied e. g. within the united states, the place a massive function has been performed via ASAE (1907), and within the Soviet Union the place the distinct Institute of Agrophysics was once based (1932) via Academician Ioffe. The ASAE's task used to be enlarged in Sixties and Seventies, in particular with the position enjoying via the Mohsenin's team and its fans. at the moment the Institute of Agrophysics of Polish Academy of Sciences was once based in Lublin and meetings on actual equipment in agriculture started to be organised. The individuals of the final convention - "Physical equipment in Agriculture - method of Precision and Quality", hung on August 27-30, 2001, have ready the root for this publication. a part of the convention contributors determined to magnify their convention papers to be extra basic and extra instructive in terms of additional improvement of the technology. New papers ready less than this choice have been reviewed, mentioned and revised, again and again, to be awarded during this book.

Show description

Read or Download Physical Methods in Agriculture: Approach to Precision and Quality PDF

Similar physical books

Structure and Approximation in Physical Theories

The current quantity comprises 14 contributions awarded at a colloquium on "Structure and Approximation in actual Theories" held at Osnabruck in June 1980. The articles are awarded within the revised shape written after the colloquium and consequently additionally take account of the result of the dialogue on the colloquium.

Human anatomy : the definitive visual guide

Deals an entire evaluate of the improvement, shape, functionality, and issues of the human physique, from muscle constitution and task to motor pathways in the mind.

Additional info for Physical Methods in Agriculture: Approach to Precision and Quality

Sample text

Some traditional concepts of soil physics need to be reconsidered or modified: for example, the concept of available water for plants should be associated with the concept of accessible water. The characterisation of soil pore system, by means of image analysis on thin sections, can provide basic information for the study of soil. The major disadvantage of this technique is that the preparation of soil thin sections is both difficult and time consuming. However, many public and private laboratories are now equipped for the preparation of soil thin sections and the development of improved computer software has made the analysis of the images easy.

Chertkov with T denoting some constant. By defmition the spatial tortuosity of a crack network in a direction is equal to the ratio of the specific area of connected cracks (per unit volume) to the specific length of crack traces at a cross-section normal to the direction. (2)) coincides with the total specific area of vertical cracks (per unit volume). Thus, according to the above defmition the constant horizontal tortuosity of the crack network, T is determined by the ratio (8) On the other hand two-dimensional tortuosity, T2 of the isotropic connected-crack traces at the horizontal cross-section (Fig.

Table 1 - Morphologic pore size classification according to Brewer (1964). e. Lm are those called Soil Pore System by Image Analysis and Microscopic Techniques 19 "transmission pores" in which the movements of water are important for plants, and, moreover, they are the pores needed by feeding roots to grow into. lm have drained, corresponds to the field capacity of the soil. lm have emptied. Table 2 - Classification of soil pores according to their size. Modified from Greenland (1977). lffi can have some useful effects on root penetration and water movement (drainage), especially in fine-textured soils.

Download PDF sample

Rated 4.50 of 5 – based on 28 votes