New edition of the 1984 book.
From the publisher's announcement:
This is a completely rewritten and expanded version of the successful 1984 book of the same name published by Butterworths. The objective remains the same: to teach students of agriculture and related ecological problems how to express ideas mathematically and solve the resulting mathematical problem. The book is designed to be a comprehensive textbook, and is suitable for self-study, with exercises and answers. While the level of mathematics is dictated by the problem, the book uses a qualified simplicity rather than a less digestible rigour. The need of many students to grasp every step of a mathematical model is appreciated and catered for.