OVERALL ASPECTS OF PLANT ANALYSIS IN VEGETABLE PRODUCTION
Many researches have much contributed to the knowledge of plant analyses during the last one and a half centuries. Goodall and Gregory  as well as Chapman  have combined these results in their books on Chemical Composition of Plants respectively and Diagnostic Criteria for Plants and Soils. Today it is generally accepted that soil analysis simulates the plant where as plant analysis gives a true picture of what is actually within the plant. Meaningful soil test results are restricted to the elements P, K, Ca, Mg, and B while plant analyses, depending on technique, can encompass unlimited numbers of elements (sometimes more than necessary). In vegetable production a combination of soil and plant analyses seems to be essential.
Perhaps the most troublesome factor for plant analyses data