Plant Density Effects on Agro-Morphological Traits of Field Pea (Pisum sativum L.) under Diyarbakir Ecological Conditions

Planting density is an agricultural parameter that significantly impacts growth, development, and yield because it influences competition between plants for inputs. Because peas are generally considered to be less competitive, increasing plant density allows them to become more competitive. The paper aimed to determine the effects of planting densities (30, 40, 50, 60 seeds/m2) on seed yield and yield-related agro-morphological traits of pea varieties (Utrillo and Combados) under rainfed conditions in Diyarbakir. The study was conducted in the 2024 growing season at Dicle University, Faculty of Agriculture, in Diyarbakır, Türkiye. The experiment was arranged in a completely randomized block design in split plots with three replicates. The results showed that the planting density significantly affected all the examined agro-morphological traits except for pod length. Therefore, crops with increasing planting densities were more productive than crops with reduced densities. Accordingly, the highest plant height (32.00 cm), seed weight plant-1 (2.28 g), number of branches plant-1 (2.60) and number of pods plant-1 (8.73) were recorded in 50 seeds/m2. Additionally, the number of seeds pod-1 (4.73), biological yield (3588.17 kg ha-1) and seed yield (1079.08 kg ha-1) remarkably increased for 60 seeds/m2.