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a) The abundance of plankton Parameter abundance of plankton in a body of water can reflect the level of fertility of a body of water. High abundance of plankton that can also show their dominance in the food chain. it can be used as indicators of a body of water. Ways of working : (1) Take the plankton samples that ...

Effect of calcium carbonate (CaCO3) in water can also be expressed as the hardness of the ability of water to form foam when mixed with detergent (soap). On the water has a low hardness will easily form foam when mixed with soap. While on the water that has high hardness would not form foam. Hardness is very important for the ...

There are two stages that occur in the formation of soil structure, namely (1) clotting (coagulation) of colloidal soil as a result of the influence of Ca2 + ions into the soil micro-aggregates, and (2) cementation (binder) micro aggregate into the aggregate macro. Meurut soil structure formation theory, based on the flocculation occurs on land that is in solution, for ...

Coexistence between microorganisms and plants takes place in the root zone of plants, because in this area provided a number of compounds required by a microorganism for the life and activities. This compound is in the form of root exudates useful as a source of C, N and energy for microorganisms, ranging from a simple organic compounds up to complex ...

Value potential redok pond bottom mud showed that soil conditions can be used to follow the progress of chemical reactions and biological phenomena in the pond. With redox potential negative value indicates the reduction reaction, which can produce compounds that are toxic to shrimp like compound sulphide (H₂S), nitrite and ammonia. Therefore, it is important to observe basic mud during ...

There are two main types of paper used, namely rough paper and soft paper. Paper used as packaging is a type of coarse paper, while fine paper is used for writing paper that is for books and paper covers. The most powerful packaging paper is kraft paper with natural color, made from softwood with sulphate process. Here are some types ...