Irrigation water quality
Research Institute of Irrigation and Drainage, Cuba.
Science and Technology in Agriculture. Irrigation and Drainage Series, Vol.10 No 1: 47-72, 1987.Cuba.
The study aims to determine how to assess the water for irrigation, because it knows that it influences both crop yields, and secondary soil salinization. The key indicators used to assess water and basic and lower application rates given are indicated. In the main indices used: the electrical conductivity EC is a way of expressing the total soluble salts, the sodium adsorption ratio RAS, residual sodium carbonate RSC indicating the risk of soil salinization, the boron content in water which is essential for the normal development of plants in very small concentrations element and if this element is exceeded can greatly damage to crops.
Salinity Laboratory of the United States has developed a classification of water for irrigation that is widely used in Cuba and 16 kinds of water establishes a function of RAS and the EC. Between lower application rates evaluated: CIP indicating harmful related proportions of other anions chloride, magnesium rate, the proportion of carbonates and sulphates. Different types of water according evaluated indexes are classified. Finally, an example of determining the indices is made and a judgment is given on water quality.