Soil analysis

Soil analysis is the sure means of measuring soil pH and estimating the supply of nutrients available in the soil for plant growth. There is a low connection between soil and plant nutrient levels in perennial fruit crops, especially that of tree fruits. When plant tissue levels are compared to corresponding soil nutrient contents, no correlation is ascertain. Therefore, soil testing alone may not provide enough information to make accurate fertilizer decisions for perennial fruit crops. Confirmable and reliable commercial soil tests have not been developed for nitrogen, copper or iron. The need for these elements can best be evaluated by plant analysis. Deficiencies of most minor elements can better be identified by plant analysis as well. Some fertility problems such as those associated with very acid or very alkaline soils are difficult to identify by plant analysis alone and are better evaluated by a soil test when used in concert with tissue analysis.