1. Plants in Action: Adaptation in Nature, Performance in Cultivation;Atwell,1999
2. Nutrient Deficiencies and Toxicities in Crop Plants;Bennett,1993
3. Nutritional Disorders of Plants: Development, Visual and Analytical Diagnosis;Bergmann,1992
4. Diagnosis of Mineral Disorders in Plants;Bould,1983
5. Introduction to Plant Physiology;Hopkins,1995