Stop losing yield to copy-paste agronomy
Master the logic behind irrigation and nutrition to drive consistent yields.
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Fertilization and Irrigation - Theory and Best Practices.
Many fertilization and irrigation recommendations still rely on “copy-paste” agronomy – applying generic programs instead of building recommendations that fit the actual field.
This book is trusted by 15,000+ readers worldwide. Written by agronomist Guy Sela, with 20+ years in commercial plant nutrition and irrigation.
It gives you the agronomic foundation to create, adapt, and explain fertilization and irrigation recommendations with confidence. It provides the step-by-step logic to make smart use of water and fertilizer.
Make your own fertilization and irrigation decisions with confidence
Delivered by email, or shipped worldwide in print.
E-book: $54
Amazon price: $85
Printed edition: $97
Includes worldwide shipping (Amazon price: $137)
Every season you apply generic recommendations is a season of underperformance.
Get the E-book Ship Me the Printed Edition
Across 260 pages, the book builds a practical understanding of crop nutrition and irrigation management, from soil and water fundamentals to fertigation and nutrient solution design.
It is structured around the agronomic principles that govern water and nutrient behavior across multiple production systems, including field crops, orchards, greenhouses, and soilless systems.
What you will learn and apply
Turn soil, water, and plant data into clear, field-ready decisions.
- Plant nutrients: Diagnose deficiencies and understand how availability changes under real field conditions.
- Irrigation water: Evaluate water quality and identify issues that directly limit crop performance.
- Soil testing: Interpret results correctly and avoid the mistakes that lead to poor recommendations.
- Soil properties: Use soil characteristics to guide fertilization and irrigation decisions.
- Water in soil: Manage water dynamics and understand what is actually available to the plant.
- Fertigation: Design and adjust nutrient programs delivered through irrigation systems.
- Fertilizer recommendations: Calculate and adapt programs based on real field variability.
- Irrigation scheduling: Decide when and how much to irrigate using practical, field-based methods.
- Hydroponics: Build and manage nutrient solutions with precision.
- Organic fertilization: Choose and apply options based on real production constraints.
About the Author
Guy Sela is an agronomist with over two decades of experience in plant nutrition, irrigation, and fertigation systems. He has worked with growers, agronomists, and agricultural companies worldwide, designing nutrient and water management strategies across a wide range of crops and production systems. He is the founder of Cropaia and yieldsApp, two agtech ventures focused on agronomic decision support.
Guy Sela
What Agronomists and Growers Say
Used by agronomists and growers in over 30 countries. Many readers describe the book as something they return to when decisions become unclear during the season.
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“I found the book to be very practical. It provides 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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“What 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.
15,000+ growers and agronomists have already made the switch from generic to field-specific. Join them.
E-book: $54
Amazon price: $85
Printed edition: $97
Includes worldwide shipping (Amazon price: $137)
Get the E-book Ship Me the Printed Edition
More Payment Options
We offer alternative country-specific payment options. For some countries these may include cash payments and debit cards.
Frequently Asked Questions
How long after I purchase will I get my book?
E-book orders are sent to your email manually — usually within a few hours. If you don’t see it within 12 hours, check your spam folder or email us at info@cropaia.com. 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.