Matching Nutrient Demand Curves: Proper timing is one of the most important factors in building an efficient and effective fertility program for California tree crops. In today’s Agronomic Minute, Dylan Rogers, Sales Account Manager for AgroLiquid, emphasized the importance of matching fertilizer applications with the tree’s nutrient demand curves to support yield and quality while avoiding costly mistakes.
Rogers noted that nitrogen and potassium demand curves deserve the closest attention from growers. These two nutrients play major roles in crop development, but they must be applied at the right time to be effective. “Pay attention to those, especially nitrogen and potassium demand curves,” Rogers said, stressing that over applying nitrogen can create problems later in the season.
Excess nitrogen applied too early or at the wrong growth stage can lead to vegetative growth issues and complications during hull split. Rogers encouraged growers to be disciplined with nitrogen rates and timing, focusing on steady applications that align with crop demand rather than large, early-season doses.
Potassium timing is just as critical. Rogers explained that potassium must be available early enough for the tree to uptake and use it effectively. When applied too late, potassium may not contribute fully to nut development or quality. Following the potassium demand curve closely helps ensure the tree has what it needs during key stages like nut fill.
Understanding uptake windows is central to maximizing fertilizer efficiency. Nutrients applied outside of these windows are more likely to be lost or underutilized. “It’s a timing deal,” Rogers said, encouraging growers to look at crop stage, historical data, and established demand curves when planning applications.
By aligning fertility programs with nutrient demand curves, growers can reduce waste, improve uptake efficiency, and support consistent yields and nut quality year after year.
For more information on nutrient timing and fertility strategies, visit AgroLiquid.com.