Effect of Different level of Nitrogen on growth and Productivity of Spinach in Helmand Province

Abstract

This study was conducted on a 100 m² area at Helmand University to investigate the effects of different
nitrogen levels on the growth and yield of spinach (Spinacia oleracea). Spinach is known for its high nutritional
value, being rich in fiber, vitamins, and minerals. Overall, the application of nitrogen had a positive effect on the
growth and yield of spinach. The study aimed to evaluate plant height, number of leaves, leaf width, and yield in
kilograms per hectare. Four treatments were applied with varying nitrogen levels (T1 - 120, T2 - 100, T3 - 80, and
T4 - 0 kg/ha), assessed using a Randomized Complete Block Design (RCBD) with four replications. The highest
plant height was recorded in T1 (120 kg N/ha), measuring 29.67 cm. The highest number of leaves was also found
in T1, with an average of 18.77. Similarly, the widest leaves (10.15 cm) were recorded in T1. The yield was also
highest in T1, with 15,575 kg/ha achieved using 120 kg N/ha.
Keywords: Spinach, Nitrogen, Growth, Yield.