California Citrus Newsletter

May 2024


Potassium: Ensuring Higher Fruit Numbers and Higher Yields with YaraTera KMAX  

Alongside nitrogen and phosphorus, potassium is one of the most important nutrients in citrus production for crop yield and improving quality. Potassium plays a major role in the movement of water, nutrients, and carbohydrates.

University and industry research has shown that potassium has a major impact on leaf size, vigor, and overall tree health. Potassium nutrition positively influences yield, fruit size, and quality. Potassium is especially important for citrus once the fruit begins to size and throughout maturity. Trials and field experience have also shown that potassium plays a role in rind thickness, fruit color, and the juice content of citrus  

Photosynthesis is impaired when plants are potassium-deficient due to a reduced osmo-regulation. Potassium is relatively immobile in most clay-type soils. Sandy soils are generally low in potassium. It is always good practice to apply potassium fertilizers based on soil and tissue analysis. Typical application practices are dry soil potassium applied annually or applied as fertigation throughout the growing season when the trees require it.

YaraTera® KMAX™ provides readily available, fully soluble potassium to nuts, fruits, and vegetables, preventing deficiencies, ensuring sufficiency, and encouraging growth of high quality, healthy crops. With 28% K20 provides a high concentration of potassium delivered in a carbon-based material to support better nutrient uptake. YaraTera KMAX is safe for crops, giving growers peace of mind by reducing the risk of crop root burn and avoiding accumulation of undesirable salts.  

Contact your Yara representative to discuss crop nutrition options.

Vanessa Vicencio

Sales Agronomist at Yara North America - South Central Valley, California


Subscribe to Yara's California Citrus Newsletter & More

Fill out this form to receive Yara's California Citrus Newsletters and other citrus crop nutrition email communications from Yara in your inbox. *Required field.

By providing information to one or more of the Yara Companies on this form, you acknowledge, agree, and understand that:

  • Your consent is not required as a condition of purchasing any goods or services from any Yara Company;

  • the information that you provide to any of the Yara Companies on this form: (i) will be stored and kept by one or more of the Yara Companies; (ii) will be used to contact you in order to keep you informed about products, services, promotions, offers, events, and other matters that one or more of the Yara Companies believe may interest you; and (iii) may be shared by such Yara Companies, now or in the future;

  • one or more of the Yara Companies may send commercial electronic messages (including email to the email address you provide and text messages to the phone number you provide), and you expressly consent to the sending of such commercial electronic messages (and acknowledge that message and data rates may apply); and

  • you can email the Yara Companies at or send a letter to Yara North America, Inc., 100 North Tampa Street, Suite 3200, Tampa, Florida, 33602, Attention: Marketing Department, if you would like to (i) know what information the Yara Companies have stored about you; (ii) correct any information the Yara Companies have about you; (iii) cancel any subscriptions to mailing lists or distribution lists of any of the Yara Companies; (iv) stop the Yara Companies from sending text messages to the phone number you provide; (v) stop the Yara Companies from sending email to the email address you provide; (vi) stop the Yara Companies from sending mail to the address you provide; (vii) request the removal of your information from the systems of any of the Yara Companies; or (viii) ask any other questions regarding the collection or use of your information by any of the Yara Companies.

By submitting this form you confirm that you have been informed that we store, collect, process, and manage your data in accordance with our Privacy Policy, and that you agree to the terms and conditions of our Privacy Policy, that you should review in full. The consent is written in the English language, and to the extent any translated versions conflict with the English language version, the English language version shall control.