Nitrogen and Phosphorus Needs for Tomatoes and Green Peppers Grown with Drip Irrigation

IPNI-2002-CAN-ON27

05 May 2003

Objectives

    The long-term objectives of this study is to develop optimum rates of fertilizer N and P for processing tomatoes and green peppers under drip fertigation, which are both economically and environmentally sound, 2) to determine the amounts of nutrients N and P required for each ton production of processing tomatoes and green peppers, and 3) to determine the threshold values of petiole NO3-N and K for processing tomatoes under drip fertigation for Ontario conditions.

    The short-term objectives of this study for 2002 were 1) to determine the relationships of fertilizer N and P rates and yield and quality of processing tomatoes and green peppers under drip fertigation; 2) to determine crop N and P uptake or removals; and 3) to evaluate the potential leaching losses of soil NO3-N and P.