Young Orchard Irrigation and Nutrient Management Handbook
Bound Book/eBook
Abdelmoneim Mohamed
Modesto
Team Members:
Mohamed, A*1
-
Irrigation and Soils Advisor , University of California ANR , Modesto, California, 95358
Abstract
In the Irrigation and Nutrient Management of Young Orchard handbook, we delve into the intricacies of irrigation and nutrient management strategies tailored specifically for young orchards, exploring key considerations, best practices, and the importance of proactive management in achieving optimal outcomes.
This guide focuses on the best irrigation and nutrient management practices for young orchards in the San Joaquin Valley. As the acreage of young orchards has expanded due to newly established plantings and the replacement of old, unproductive trees, it is crucial to address their sensitivity to water limitations. Growers often use calculated crop evapotranspiration for irrigation, but the crop coefficients are designed for mature, full-canopy orchards. The water use of young trees changes rapidly both from year to year and within a single season. Understanding the unique water requirements of young trees and implementing advanced irrigation strategies ensures healthy orchard development, optimal water use, and long-term productivity.
Young orchards have distinct nutrient requirements compared to mature orchards. During the initial growth stages, trees allocate significant energy toward root development and canopy establishment. Essential nutrients such as nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) are vital for promoting vigorous root growth, foliar expansion, and overall tree vitality. Additionally, micronutrients like iron (Fe), zinc (Zn), manganese (Mn), and boron (B) are critical for enzyme activation, photosynthesis, and overall metabolic processes.
Implementing best management practices for young orchard irrigation and nutrient management is essential for coping with recurring drought and complying with Irrigated Lands Regulatory Program (ILRP) and Sustainable Groundwater Management Act (SGMA) regulations. This handbook provides the necessary insights and practical guidance to help growers achieve these goals and enhance the productivity and sustainability of their young orchards.
The handbook helps growers make better irrigation and fertigation decisions during establishment to ensure healthier tree development,. To broaden its reach, the handbook was also translated into Spanish and Punjabi, improving access for underserved and often under-resourced farm communities. The program is particularly valuable for growers planting new orchards or shifting to alternative crops as SGMA requirements tighten and groundwater pumping limits reduce the water available for production.
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