Soil Fertility Manual: To understand soil fertility is to understand a key to mankind's survival on this planet.

The Soil Fertility Manual, first published in 1978, was most recently revised and updated in 2006. It features the basic principles of soil/plant relationships and fertilizer/aglime use. The Manual serves as a practical and modern resource on soil fertility, including the primary and secondary nutrients and micronutrients, soil sampling and testing, plant analysis, other diagnostic techniques, and more. The publication contains 11 chapters, plus an appendix section containing tables of conversions, reference lists, and color photos of various nutrient deficiency symptoms in crops.