Agricultural limestone

Limestone, chalk, and marble are all forms of calcium carbonate. Limestone rock can be used to build roads, but it is a very important basic compound used in large quantities by chemical industries. For example, limestone is used directly to make concrete and cement. It is also used in the manufacture of glass and in agriculture. Limestone is often processed to make quicklime, CaO, and hydrated lime (calcium hydroxide), Ca(OH)2. 

Apparent activation energies of acid dissolution of calcite and dolomite and severa. samples of agricultural limestone indicate that the activation energy of dolomite varies... 

SYNS AGRICULTURAL LIMESTONE AGSTONE ARAGONITE ATOMIT BELL MINE PULVERIZED limestone CALCITE CARBONIC ACID, CALCIUM SALT (1 1) CHALK DOLOMITE FRANKLIN D LIMESTONE (FCC) LITHOGRAPHIC STONE MARBLE NATURAL CALCIUM CARBONATE PORTLAND STONE SOHNHOFEN STONE VATERITE... 

Anon., 1975. Report of Tonnage of Agricultural Limestone Used in the United States in 1972. National Limestone Institute, Inc., Fairfax, VA, 1 p. 

Annual data on the consumption of agricultural limestone and other liming materials can be obtained from the Agricultural Limestone Institute, of Washington, D. C. 

Data on agricultural limestone and other liming materials consumption, annually. 

With the slower, cooler method, start off the composter with a 12 in (30 cm) layer of mixed matter and add to it when you can. Don t put in too much of one thing kitchen scraps should be mixed with bulkier pieces of cardboard or scrunched-up paper, and grass clippings with coarser bits of plants. If the heap becomes too wet, fork in some bulky woody matter or cardboard. A handful of ground agricultural limestone stops the heap from becoming acidic, which slows down decomposition. Check the bottom section of the heap after several months and any dark, well-rotted matter can be dug out ready for use. Then mix up the remaining material, water if necessary, and return it to the composter. 

This field lists other names by which the chemical is known. Many of these names are trade names. The most commonly used synonyms are given. The following are examples of synonyms by which some chemicals are known calcium carbonate is also known as agricultural limestone 1,1,2-trichloroethane is also known as ethane trichloride or vinyl trichloride and polychlorinated biphenyls are referred to as Aroclors. An exhaustive treatment of synonyms is not possible in a short information sheet. 

The production of large tonnages of finely divided limestone and chalk products only became economic with the development of dry grinding equipment in the middle of the 20th century. Such products are commonly called agricultural lime . To avoid confusion with quicklime and hydrated lime products, the term agricultural limestone will be used. 

The effectiveness of an agricultural limestone in raising the pH of the soil depends on... 

Agricultural limestone can be spread at any time when ground conditions permit. It is usually applied to arable land after cropping. Because it can take several weeks for the limestone to react sufficiently to raise the pH into the required range, the application should be made well in advance of sowing. 

Applications of agricultural limestone are used to raise the pH of streams draining forested areas. The limestone is spread in a very finely divided form (e.g. 50 % less than 10 pm), at about 15 tonnes per hectare [10.2], over the boggy areas in the headwater regions of sensitive catchment areas. Such areas are generally left unplanted so the limestone does not adversely affect tree growth. Regular repeat applications are necessary. 

During the past four decades, however, the increasing availability of ground agricultural limestone at relatively low prices has resulted in the growth of its sales at the expense of lime products. In many countries, the sales of lime products for use in agriculture amounts to 1 to 2 % of the total produced. 

Most lime products currently used for liming have a top size of 6 mm or less. This suits modern mechanical spreading equipment and helps to ensure an even distribution. Because the neutralising values of lime products are often almost double those of agricultural limestone, the application rates are correspondingly lower. 

Agricultural limestone is a ground limestone product used to neutralize soil acidity. 

Although colorimetric methods are tedious and require much time, they remain useful for measurements in materials with low Mo concentrations. A modified stannous chloride-thiocyanate procedure described by Marmoy (1939) and Johnson and Arkley (1954) has been used extensively in our laboratory for many years and has yielded useful results (Sims and Atkinson, 1974 Pal et al., 1976 Hawes, Sims, and Wells, 1976 Sims, Leggett, and Pal, 1979 Sims, 1996). An example of such data is shown in Figure 7.1 (Sims and Atkinson, 1976). In that study, an acid soil (pH 5.4) had been treated with various amounts of agricultural limestone and N, P, and K fertilizers in the form of NaNOa or urea, concentrated superphosphate, and K2SO4, respectively. Maximum cured yields of hurley tobacco were associated with leaf-tissue Mo concentrations of about 0.42 mg kg in this largely acid soil environment. 

Synonyms cas isn-es-s agricultural limestone agstone aragonite atomit calcite chalk ... 

Some use has been made of limestone screenings as agricultural limestone, and baghouse fines from quarry sources have been used as mineral filler in asphalt paving... 

Synonyms Agricultural limestone Calcite Calcium carbonate natural Chalk Cl 77220 Dolomite Franklin Limestone Lithographic stone Marble Natural calcium carbonate Paris white Pigment white 18 Portland stone Vaterlte Whiting Classification Inorganic salt... 

Agricultural lime. See Calcium hydroxide Agricultural limestone. See Calcium carbonate Agrilan X98. See Calcium dodecylbenzene sulfonate... 

Ormerod, S.J. Edwards, R.W. (1985) Stream acidity in some areas of Wales in relation to historical trends in afforestation and the usage of agricultural limestone. J, Environ, Management 20,189-197. 

Synonyms Agricultural limestone Allied whiting Calcite Calcium carbonate (INCI) Calcium carbonate (1 1) Calcium carbonate, precipitated Calcium monocarbonate Carbonic acid calcium salt Carbonic acid calcium salt (1 1) Chalk Cl 77220 Dolomite Drop chalk English white Franklin Limestone Lithographic stone Marble Monocalcium carbonate Natural calcium carbonate Paris white Pigment white 18 Portland stone Precipitated calcium carbonate Precipitated chalk Prepared chalk Vaterite Vienna white White powder Whiting Classification Inorganic salt... 

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