Author: R. M. Salter
Publisher:
ISBN:
Category : Hydration
Languages : en
Pages : 12
Book Description
The functions and importance of calcium and magnesium supplied to the soil by liming have been discussed in detail by Fippin (10). We shall merely summarize this phase of the subject by saying that liming increases the efficiency of utilization of the available water and fertility of the soil by correcting some factors unfavorable to plant growth, making possible more economical crop production and tending to conserve the soil. Only the basic calcium and magnesium compounds--the oxides, hydroxides, and carbonates (and possibly certain silicates, such as blast furnace slag)--are to be included under the term "liming materials." Ground burned lime was formerly in favor, but is no longer of much importance in agriculture. Hydrated lime is still used to a considerable extent where a concentrated and very quickly active lime is desired. Its extreme fineness and bulk make it easy to spread at light rates, and the temporarily very high pH value resulting from heavy applications may have a sterilizing effect, not shown by ground limestone, against certain plant diseases. The total neutralizing power (T.N.P.) of hydrate and other liming materials, expressed as the equivalent percentage of calcium carbonate (C.C.E.), should always be specified rather than the contents of total oxides only, as is sometimes done, as the latter permits no comparison of value without calculation. Ground limestone, the cheapest and usually the most economical agricultural lime, is offered in several grades, both dolomitic and high-calcium, at prices naturally increasing with the expense of finer grinding and of drying necessary for this operation, and of marketing in bags. Meal and agricultural ground limestone can be produced from undried rock, shipped in open cars, and piled in the field--factors conducive to low cost per ton spread. But for quick effects, these grades must be applied at a heavier rate which may be less profitable than a lighter application of a higher grade liming material. High-magnesium limestone is known to be less rapidly active in the soil, but is usually of higher potential activity as indicated by the total neutralizing power, and some soils, chiefly in the eastern seaboard states, are in great need of the element, magnesium. It is generally accepted that for equal effects a dolomite should be more finely ground than a high-calcium limestone, but little has been published on which to base an opinion as to the optimum fineness under a particular set of circumstances.
Criteria for the Evaluation of Agricultural Ground Limestone
Author: R. M. Salter
Publisher:
ISBN:
Category : Hydration
Languages : en
Pages : 12
Book Description
The functions and importance of calcium and magnesium supplied to the soil by liming have been discussed in detail by Fippin (10). We shall merely summarize this phase of the subject by saying that liming increases the efficiency of utilization of the available water and fertility of the soil by correcting some factors unfavorable to plant growth, making possible more economical crop production and tending to conserve the soil. Only the basic calcium and magnesium compounds--the oxides, hydroxides, and carbonates (and possibly certain silicates, such as blast furnace slag)--are to be included under the term "liming materials." Ground burned lime was formerly in favor, but is no longer of much importance in agriculture. Hydrated lime is still used to a considerable extent where a concentrated and very quickly active lime is desired. Its extreme fineness and bulk make it easy to spread at light rates, and the temporarily very high pH value resulting from heavy applications may have a sterilizing effect, not shown by ground limestone, against certain plant diseases. The total neutralizing power (T.N.P.) of hydrate and other liming materials, expressed as the equivalent percentage of calcium carbonate (C.C.E.), should always be specified rather than the contents of total oxides only, as is sometimes done, as the latter permits no comparison of value without calculation. Ground limestone, the cheapest and usually the most economical agricultural lime, is offered in several grades, both dolomitic and high-calcium, at prices naturally increasing with the expense of finer grinding and of drying necessary for this operation, and of marketing in bags. Meal and agricultural ground limestone can be produced from undried rock, shipped in open cars, and piled in the field--factors conducive to low cost per ton spread. But for quick effects, these grades must be applied at a heavier rate which may be less profitable than a lighter application of a higher grade liming material. High-magnesium limestone is known to be less rapidly active in the soil, but is usually of higher potential activity as indicated by the total neutralizing power, and some soils, chiefly in the eastern seaboard states, are in great need of the element, magnesium. It is generally accepted that for equal effects a dolomite should be more finely ground than a high-calcium limestone, but little has been published on which to base an opinion as to the optimum fineness under a particular set of circumstances.
Publisher:
ISBN:
Category : Hydration
Languages : en
Pages : 12
Book Description
The functions and importance of calcium and magnesium supplied to the soil by liming have been discussed in detail by Fippin (10). We shall merely summarize this phase of the subject by saying that liming increases the efficiency of utilization of the available water and fertility of the soil by correcting some factors unfavorable to plant growth, making possible more economical crop production and tending to conserve the soil. Only the basic calcium and magnesium compounds--the oxides, hydroxides, and carbonates (and possibly certain silicates, such as blast furnace slag)--are to be included under the term "liming materials." Ground burned lime was formerly in favor, but is no longer of much importance in agriculture. Hydrated lime is still used to a considerable extent where a concentrated and very quickly active lime is desired. Its extreme fineness and bulk make it easy to spread at light rates, and the temporarily very high pH value resulting from heavy applications may have a sterilizing effect, not shown by ground limestone, against certain plant diseases. The total neutralizing power (T.N.P.) of hydrate and other liming materials, expressed as the equivalent percentage of calcium carbonate (C.C.E.), should always be specified rather than the contents of total oxides only, as is sometimes done, as the latter permits no comparison of value without calculation. Ground limestone, the cheapest and usually the most economical agricultural lime, is offered in several grades, both dolomitic and high-calcium, at prices naturally increasing with the expense of finer grinding and of drying necessary for this operation, and of marketing in bags. Meal and agricultural ground limestone can be produced from undried rock, shipped in open cars, and piled in the field--factors conducive to low cost per ton spread. But for quick effects, these grades must be applied at a heavier rate which may be less profitable than a lighter application of a higher grade liming material. High-magnesium limestone is known to be less rapidly active in the soil, but is usually of higher potential activity as indicated by the total neutralizing power, and some soils, chiefly in the eastern seaboard states, are in great need of the element, magnesium. It is generally accepted that for equal effects a dolomite should be more finely ground than a high-calcium limestone, but little has been published on which to base an opinion as to the optimum fineness under a particular set of circumstances.
Evaluation of Agricultural Limestone
Agricultural Library Notes
Author:
Publisher:
ISBN:
Category : Agricultural libraries
Languages : en
Pages : 718
Book Description
Publisher:
ISBN:
Category : Agricultural libraries
Languages : en
Pages : 718
Book Description
Bulletin
Bulletin of the Agricultural Experiment Station of the University of Tennessee, State Agricultural and Mechanical College
A Study of Standards for the Evaluation of Ground Limestone on the Basis of Fineness
Author: Theodore Cuyler Bigger
Publisher:
ISBN:
Category : Limestone
Languages : en
Pages : 92
Book Description
Publisher:
ISBN:
Category : Limestone
Languages : en
Pages : 92
Book Description
Bulletin
Author: American Society for Testing Materials
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 1370
Book Description
Vol. 12 includes under the same cover the society's year-book for 1912.
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 1370
Book Description
Vol. 12 includes under the same cover the society's year-book for 1912.
Soil Acidity and Liming
Author: Fred Adams
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 400
Book Description
The chemistry of acidity. Physiological effects of hydrogen, aluminum, and managanese toxicities in acid soil. Physiological aspects of calcium, magnesium, and molybdenum deficiencies in plants. Liming materials and practices. Crop response to lime in the southern united states. Crop response to lime in the midwestern united states. Crop response to lime in the northeastern united states. Crop response to lime in the wested states. Crop response to lime on soils in the tropics. Glossary-common and scientific names of crops referred to in this monograph.
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 400
Book Description
The chemistry of acidity. Physiological effects of hydrogen, aluminum, and managanese toxicities in acid soil. Physiological aspects of calcium, magnesium, and molybdenum deficiencies in plants. Liming materials and practices. Crop response to lime in the southern united states. Crop response to lime in the midwestern united states. Crop response to lime in the northeastern united states. Crop response to lime in the wested states. Crop response to lime on soils in the tropics. Glossary-common and scientific names of crops referred to in this monograph.
Bulletin of the Agricultural Experiment Station of the University of Tennessee, State Agricultural and Mechanical College
Author: William Moses Shaw
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 32
Book Description