Articles

Improving the Quality of Functional Food Crops and Land Efficiency by Intercropping System on Application of Integrated Fertilizer

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The intercropping system and integrated fertilizers were applied in the research to improve land efficiency and the quality of sweet corn and vegetable soybean crops. The study was conducted in the Giwangan Village of Umbulharjo Yogyakarta, Indonesia, and was set up using a three-replication factorial Randomized Complete Block Design. Three organic fertilizer sources (cow manure, chicken manure, and composted waste) made up the first factor, and the second factor was NPK fertilizer doses (200, 300, and 400 kg ha-1). Two control treatments were also made, which resulted in 33 experimental plots. The observed data were subjected to analysis of variance and Duncan’s Multiple Range Test at a significance of 5%. The study’s findings demonstrated that the combination of 300–400 kg ha–1 NPK fertilizer and chicken manure increased variables such as the content of vitamin C and pro-vitamin A, number of seed rows, number of 2-3 seed pods, and sweetness level of soybean and sweet corn, as well as the land equivalent ratio, land equivalent coefficient, competition index, system productivity index, and relative yield mixture.

Chicken Manure and KCL Effect on Growth and Yield of Sweet Corn in Ultisol

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Cultivation of sweet corn in Ultisols faces problems due to the poor quality of the soil. As a result, it is necessary to improve soil fertility through fertilization. Chicken manure can improve the fertility of Ultisol. However, it is a prolonged-release fertilizer, so it should be applied in conjunction with readily available fertilizers to plants, such as KCl. This study aimed to determine the effect of the dose of chicken manure and KCl on the growth and yield of sweet corn. The study was carried out between April and June 2019 in Medan Baru, Kandang Limun Village, Bengkulu, Indonesia. The experiment was arranged in a Randomized Complete Block Design (RCBD) with two factors. The first factor was the dose of chicken manure (20% moisture content), consisting of 3 levels, namely 0, 10, and 20 tons/ha. The second factor was the dose of KCl, which consists of 3 levels, namely 100, 150, and 200 kg/ha. The result indicated no interaction effect of chicken manure and KCl on sweet corn growth and yield. Likewise, sweet corn growth was affected by chicken manure. At a 10 t/ha dose, chicken manure increased plant height, shoot fresh and shoot dry weight. A 150 kg/ha of KCl resulted in higher plant height, shoot fresh weight, and unhusked cob weight than a 100 kg/ha.