Fertilization and Irrigation - Theory and Best Practices
Fertilization and irrigation decisions often look correct at the moment they are made. Rates are reasonable. Soil and water tests support the choice. The logic makes sense.
Yet at harvest, yield, quality, or uniformity often fall short, with no clear point in the season where a mistake was visible.
This book was written to address that gap between decisions that feel right and outcomes that do not. It is not a book to read once and put away. It takes the reader step by step when when planning fertilizer programs, interpreting soil and water tests, and adjusting irrigation and fertigation decisions during the season.
Written for agronomists, consultants, and growers responsible for fertilization and irrigation decisions across a wide range of production systems, including field crops, orchards, greenhouses, and soilless systems.
Trusted by more than 15,000 agronomists and growers worldwide.
Choose your format now, before the next decision is made
Receive the eBook by email shortly after purchase, or order the printed edition shipped worldwide.
Both formats provide the same clear principles and best practices for nutrient and water management.
Buy the E-book ($54) Order a printed copy
The price of the printed copy is $97 to most destinations
Applied Agronomic Principles
Across 260 pages, the book builds a structured understanding of crop nutrition and irrigation management, from soil and water fundamentals to practical fertigation and nutrient solution design.
The book is structured around agronomic principles that govern water and nutrient behavior in production systems. These principles are illustrated through real production scenarios, allowing consistent decision-making across field, greenhouse, and hydroponic environments.
What’s Inside the Book
- The essential plant nutrients: Their roles, availability, and deficiency symptoms.
- Irrigation water: Parameters for assessing irrigation water quality, and how to interpret water analysis.
- Soil Testing: Effectively interpreting soil test results for informed decision-making.
- Soil properties: How soil properties impact plant growth and decision-making.
- Water in soil: Understanding soil water dynamics and plant accessibility.
- Fertigation: Best practices to optimize nutrient delivery via irrigation.
- Fertilizer recommendations: How to calculate and provide fertilizer recommendations.
- Irrigation scheduling methods: Principles and practices of optimizing irrigation schedules.
- Hydroponics: Growing techniques, preparation of nutrient solutions, and more.
- Organic fertilization: Exploring sustainable nutrient options.
About the Author
Guy Sela is an agronomist specializing in plant nutrition, irrigation, and fertigation systems, with over two decades of experience in commercial agriculture.
His work focuses on designing nutrient and water management strategies across a wide range of crops, production systems, and climatic conditions. Over the years, he has worked directly with growers, agronomists, and agricultural companies worldwide, supporting decision-making in fertilization, irrigation scheduling, water quality management, and nutrient solution design.
Guy is the founder of Cropaia and yieldsApp, two agtech ventures focused on agronomic decision support and applied agricultural knowledge. This book reflects the principles and practices he applies when designing nutrient and irrigation programs for commercial crop production.
Guy Sela
What Agronomists and Growers Say
What Agronomists and Growers Say
Many readers describe the book as something they return to when decisions become unclear during the season.
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“A very practical book. Clear explanations that helped me improve fertilizer planning across several farms.” Christo B., South Africa |
“The concepts are easy to apply. Excellent structure and very relevant examples.” Jacques D., Australia |
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“A comprehensive guide. I highly recommend it. Well written and technically solid.” Slobodan Pavlović, Serbia |
“This book is an insightful resource. The explanations improved my understanding of several key fertilization and irrigation concepts.” Mike J., USA |
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“Excellent reference for nutrient and water management.” Yiek Chun C., Malaysia |
“The book contains many insights I didn’t expect. It helped refine my approach for the upcoming season.” Andrei D., Moldova |
This book is designed as a professional reference for making real-world fertilization and irrigation decisions.
Join 15,000+ readers improving their crop management today.
Receive the eBook by email shortly after purchase, or order the printed edition shipped worldwide.
Both formats provide the same clear principles and best practices for nutrient and water management.
Buy the E-book ($54) Order a printed copy
The price of the printed copy is $97 to most destinations
Alternative payment methods
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Frequently Asked Questions
How long after I purchase will I get my book?
If you purchased the e-book, we will send it to your email address within maximum 12 hours (but usually much earlier). If you purchased the hard copy we will ship it to you as soon as possible via registered mail. Delivery time is usually 2-5 weeks, depending on the destination.
Is a hard copy available?
Yes, a hard copy is available. You can purchase it on this page. We ship to most countries. If you are not sure whether we can ship to your country, send us an email to info@cropaia.com
What payment methods do you accept?
You can pay with a credit card, Paypal (using the same buy button), Western Union, MoneyGram or bank transfer. You can check for additional payment methods available in your country in the following links: Digital book, Printed copy
Can I print the e-book?
You can ask for a license to print the e-book. We will send you a license to print one copy (subject to our discretion)
Can I read the e-book offline?
Yes, the e-book comes in a pdf format that you can read offline
I haven't received my e-book to my email address. What should I do?
In case it has been more than 12 hours and you haven’t received the e-book, check your Spam folder. If you don’t find it there, send us an email to info@cropaia.com and we will re-send it to you. Although rare, some inboxes might not accept the file due to its size. We also had cases where users left a wrong email address during the purchase proceses.
Where can I access the table of contents of the book?
You can download the table of contents here
Do you also offer online courses?
Yes, we offer online courses for agronomists and growers. You can learn more here.