Tropical agriculture is highly dependent of soluble fertilizers, what raises the cost production. An alternative to reduce costs inputs use low-cost nutrient sources, such as basic rocks. The aim work was evaluate effect basalt powder on soil chemical properties and plant growth. experiment arranged in a 2×2×2×3+4 factorial scheme: two soils (clay sandy clay loam soil); crops ...

Abstract Inexpensive sintered glass-ceramic glaze was prepared from a mixture of Egyptian trachyte with either limestone or magnesite. A represented rock pulverized to powder (<0.083 mm) and also both The well mixed batches were melted near 1450 °C/3 h temperature then the glass melt quenched in water, dried, finally shaped moulds. sintering process pre-shaped glasses, within 1000-1100 °C ra...

Because grains comprise the major portion of diets for finishing beef cattle, and grains contain little calcium, limestone is typically added to finishing diets at levels of .7 to more than 1% of the dry matter. Feedgrade limestone varies in quality and consistency, which could alter performance responses by finishing beef steers. Selection of superior sources of limestone and(or) treatment of ...

• Production of maximally viable B. amyloliquefaciens H57 probiotic dried powder. Understanding the inherent thermostability bacterium is key for process development. Spray drying at an optimal outlet temperature provided best cell survivability. more efficient than freeze in preserving viability. Refrigeration prolonged shelf-life and practices production Bacillus as a power feed applications ...

In recent, the placement of backfill in underground mines has emerged as a new paradigm in research as it not only improves safety but also allows disposal of byproducts including coal ash. In this regards, this paper addresses the backfilling challenges in limestone mine to prevent sinkhole and subsidence. Limestone mines, generally regarded as being safer than coal and metal mines, have been ...

Two experiments were conducted to compare a sample of calcium citrate-malate (CC-M) with a sample of commercial-grade limestone in starting broiler chick diets. In the first experiment, with 0.7 or 0.9% calcium from limestone or CC-M, no differences in bone development (dry fat-free tibia, tibia weight, tibia ash, or tibia calcium) were observed due to calcium source. However, chicks fed the di...

A 112-day trial was carried out to evaluate the effect of dietary calcium level and limestone particle size on the egg quality of 288 HyLine Brown semi-heavy layers, with 83 weeks of age at the beginning of the experiment. A completely randomized experimental design was applied in a 2x3 factorial arrangement, with two dietary calcium levels (3.5 and 4.0%) e three limestone particle size composi...

Limestone dust is generally regarded as being relatively harmless. In this paper I wish to record eight cases of pneumoconiosis in limestone workers, in all of which limestone played the sole or principal aetiological part. My attention was first drawn to the condition in November, 1950, when I saw the chest radiograph of a patient whose occupation was limestone crushing. The appearances were m...

Acidic mine drainage (AMD) containing elevated concentrations of dissolved iron and other metals can be neutralized to varying degrees by reactions with limestone in passive treatment systems. We evaluated the chemical and mineralogical characteristics and the effectiveness of calcitic and dolomitic limestone for the neutralization of net-acidic, oxic, iron-laden AMD from a flooded anthracite m...