Reports say that Guava may be grown with soil pH upto 8.5. High calcium soils are with high pH. High calcium type of soils are usually called as calcareous soils and said to contain more than 15 % of Calcium carbonates [CaCO3]. This CaCO3 is present in the form of powder, nodules or crusts. Crops may be grown in these type of soils where adequate water is available and with sufficient nutrients.
Generally calcareous soils have low organic matter content and nitrogen nutrients will always be at lower side. Nitrogen nutrients may be supplied to time to time for the crop cycle.
Phosphorous is also deficient in calcareous soils. Phosphorous supplement to the crop may be decided with the soil analyses data. Sometimes excess applied phosphorus may lead to deficiency of micronutrients zinc or iron. In calcareous soils, the applied phosphorus fertilizer should be in water soluble form for more effectiveness.
More and more applications of animal based manure are helpful in preventing deficiencies of nutrients in calcareous soils. Application of sulphur to the these will decrease the pH of the soil.