The purpose of this book is to serve as a foundational resource for students and researchers in the field of numerical solving. It has been written in a straightforward and accessible language, with formulas presented in a simple manner for basic calculations. The book has been organized into several chapters, each covering a different aspect of the subject matter. This book focuses on providing the essential formulas and conversions required for calculations in agriculture, which are the most commonly used in the field. The units, dimensions, and relevant symbols are also included in the book, presented in their actual notations for easy reference.

1. Agricultural Economics 2. Agricultural Meteorology 3. Agricultural Physics 4. Agronomy 5.Crop Protection 6. Analyses and Interpretation 7. Irrigation and Water Management 8. Physiology and Biochemistry 9. Soil Chemistry and Fertilit 10. Soil & Watershed Engineering 11. Statistics