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Browse by Author: Emmanuel Torres Quezada
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Fundamentals of Precision Agriculture for Vegetable Crops

By: Emmanuel Torres Quezada, Jing Zhang

Precision agriculture (PA), often referred to as "smart farming" or "precision farming," represents a transformative paradigm shift in the field of horticultural sciences, particularly when applied to vegetable cultivation. The fundamentals of PA involve site-specific management of inputs such as water, fertilizer, and pesticides. Nowadays, PA leverages advances in remote sensing, robotics, and data science to optimize crop production, enhance both yield and resource efficiency, and minimize environmental impacts. This article introduces PA technologies and recent advances, along with the potential benefits they bring to vegetable production. It also provides considerations for growers interested in adopting PA technologies in their operations.

Basics of Broccoli Production

By: Emmanuel Torres Quezada

This document provides essential information on broccoli cultivation, including optimal planting dates for North Carolina, soil and nutrient requirements, and cultivation techniques. It emphasizes proper spacing, high nitrogen levels, and effective harvesting and postharvest methods. This guide offers practical advice for maximizing broccoli yield and quality.

Irrigation for Vegetables: Understanding Evapotranspiration and Its Importance

By: Emmanuel Torres Quezada

Efficient irrigation is crucial for vegetable production in North Carolina, where weather variability demands careful water management. This publication explains the concept of evapotranspiration (ET)—the combined water loss from soil and plants—and its significance in determining crop water needs. Key topics include the types of ET, the role of the crop coefficient (Kc) in tailoring ET calculations for specific crops and growth stages, and practical steps for using ET and Kc to optimize irrigation. By understanding these principles, farmers can improve water use efficiency, reduce costs, and enhance crop yields while promoting sustainable farming practices.

The Importance of Boron in Vegetable Crop Nutrition in North Carolina

By: Emmanuel Torres Quezada Vegetable Nutrient Management

Boron (B) is a critical micronutrient essential for the growth, development, and productivity of vegetable crops. Although required in trace amounts, boron plays a fundamental role in plant physiology, influencing cell wall integrity, reproductive success, and metabolic processes. In North Carolina, where diverse soil types and vegetable cropping systems coexist, managing boron availability is vital to optimize yields and ensure crop quality. This publication provides a comprehensive overview of boron’s role in plant health, its behavior in soils, and strategies for effective management.

Foliar Analysis for Bell Pepper Production in North Carolina: A Guide for Growers

By: Emmanuel Torres Quezada Vegetable Nutrient Management

This guide provides North Carolina bell pepper growers with a comprehensive approach to nutrient management through foliar analysis. Foliar analysis offers a precise method for assessing nutrient levels within plants, enabling targeted nutrient adjustments at key growth stages—vegetative, flowering, and early fruit set. This document covers essential sampling techniques, including optimal leaf selection, handling, and transportation, to ensure accurate results. It also provides recommended nutrient sufficiency ranges, allowing farmers to interpret foliar analysis data effectively and adjust fertilization practices to enhance crop health and yield. Additionally, guidelines for foliar fertilization are provided, emphasizing timing, solution preparation, and application methods to prevent plant damage and ensure nutrient uptake. By integrating foliar analysis into regular crop management, bell pepper growers can optimize nutrient application, improve fruit quality, and support sustainable production.

The Importance of Zinc in Vegetable Crop Nutrition in North Carolina

By: Emmanuel Torres Quezada Vegetable Nutrient Management

Zinc (Zn) is an essential micronutrient for plant growth, playing a critical role in numerous physiological processes, including enzyme activation, protein synthesis, and hormonal regulation. While required in small amounts, zinc is indispensable for high-quality vegetable production. Deficiencies can severely affect crop performance, leading to reduced yields and quality. This publication focuses on zinc management for tomatoes, peppers, eggplants, broccoli, and cabbage, addressing its importance, adequate soil and foliage levels, fertilizer sources, and strategies for identifying and correcting deficiencies.

The Importance of Manganese in Vegetable Crop Nutrition in North Carolina

By: Emmanuel Torres Quezada Vegetable Nutrient Management

Manganese (Mn) is a critical micronutrient essential for the growth, development, and productivity of vegetable crops. Despite being required in trace amounts, manganese plays a pivotal role in key physiological processes, including photosynthesis, enzyme activation, and plant stress mitigation. Its availability in soils is influenced by several factors, particularly soil pH, redox conditions, and organic matter content, making proper management vital for optimal crop performance. This publication provides a comprehensive overview of manganese’s role in plant physiology, its forms and availability in soils, and practical strategies for managing manganese in vegetable production systems.

The Importance of Iron in Vegetable Crop Nutrition in North Carolina

By: Emmanuel Torres Quezada Vegetable Nutrient Management

Iron (Fe) is an essential micronutrient required for numerous physiological processes in plants, including chlorophyll synthesis, respiration, and enzymatic activity. While iron is necessary in small amounts, its availability is often a limiting factor in vegetable production due to its interactions with soil pH and other nutrients. Proper management is crucial for crops such as tomatoes, peppers, eggplants, broccoli, and cabbage to ensure optimal growth, yield, and quality. This publication explores the importance and dangers of iron, adequate levels in soil and foliage, fertilizer sources, methods for identifying deficiencies and correcting them, and the influence of soil pH and water management on iron availability.

Plastic Mulch Selection for Tomato Production in North Carolina

By: Emmanuel Torres Quezada

Growing tomatoes during the summer in North Carolina presents significant challenges due to high temperatures and irregular rainfall. These conditions can shorten the growing season, reduce yields and fruit quality, and increase pest pressure. This guide provides insights into selecting the most suitable plastic mulch to mitigate these issues.