Response of nitrogen source and plant spacing to the physiology and yield of sweet corn (Zea mays saccharata Sturt)

2025-11-05T05:05:21+00:00

Sweet corn (Zea mays saccharata Sturt) has high public interest, as it encourages farmers to cultivate it. The nitrogen source is related to the plant's physiological response. In addition to nitrogen fertilizer, plant spacing in sweet corn cultivation also needs to be considered. Plant spacing refers to the distance between individual plants or a plant population. Therefore, it is essential to investigate these efforts to enhance the physiological response of plants. This research is a factorial experiment arranged according to a randomized complete block design (RCBD) with two factors. The first factor is the type of nitrogen source, specifically urea, at a rate of 350 kg.ha-1 (Control), Urea 200 kg.ha-1, ZA 200 kg.ha-1, and KNO3 200 kg.ha-1. The plant spacing is 70 cm x 20 cm, 70 cm x 30 cm, and 70 cm x 40 cm. Nitrogen source and plant spacing treatments did not show any significant interaction. The most effective combination is 200 kg of KNO₃ per hectare with a planting distance of 70 cm x 40 cm.

Contribution to Sustainable Development Goals (SDGs):
SDG 2: Zero Hunger
SDG 12: Responsible Consumption and Production

Morisita Index Analysis Reveals Contrasting Distribution Patterns of Pest Insects in Cocoa Agroforestry Systems: Uniform under Papaya vs. Clumped under Banana Canopies

2026-04-23T08:21:38+00:00

The distribution pattern describes how organisms are distributed within a population. Distribution patterns are divided into three types: clumped, uniform, and random. This study aims to analyse differences in the distribution patterns of pest insect genera between shaded cocoa farms with papaya trees and those with banana trees, and to examine the influence of temperature and humidity on increases in pest insect populations in cocoa farms. The research was conducted from January to March 2025. Various trapping methods used include yellow, pitfall, and light traps, as well as visual observations. The distribution pattern was analysed using the Morisita Index (Id), while the effects of temperature and humidity were tested with simple linear regression. Morisita's analysis shows that the distribution pattern of pest insects is significantly more uniform under papaya shade and more clumped under banana shade. Temperature and humidity do not have a significant effect on population increase.

Agriverse

Response of nitrogen source and plant spacing to the physiology and yield of sweet corn (Zea mays saccharata Sturt)

Morisita Index Analysis Reveals Contrasting Distribution Patterns of Pest Insects in Cocoa Agroforestry Systems: Uniform under Papaya vs. Clumped under Banana Canopies