Economic Aspects of Zinc Oxide Fertilization in Yam (<i>Dioscorea alata</i> L.) in a Semi-Arid Region of Brazil
Antônio Lourenço Bezerra | João Everthon da Silva Ribeiro | Ester dos Santos Coêlho | Elania Freire da Silva | Pablo Henrique de Almeida Oliveira | Gisele Lopes dos Santos | Antonio Gideilson Correia da Silva | José Travassos dos Santos Júnior | Ivanice da Silva Santos | Felipe Alves Reis | Lindomar Maria da Silveira | Aurélio Paes Barros Júnior | Adriano do Nascimento Simões
The management and improvement of yam productivity are associated with a good supply of essential nutrients for the growth and development of the crop that has economic viability. This research aimed to evaluate the economic feasibility of foliar fertilization with Zintrac<sup>®</sup> in two yam agricultural seasons (2022/2023 and 2023/2024). Therefore, two experiments were conducted at the Rafael Fernandes Experimental Farm, Mossoró, RN, Brazil. The experimental design was in a Latin square design with five treatments of doses of Zintrac<sup>®</sup> (0, 1, 2, 3, and 4 L ha<sup>−1</sup>) and five replications. Among the production costs of yams, labor and seed acquisition were the most significant. The highest profitability index was achieved with the dose of 1L Zintrac<sup>®</sup> ha<sup>−1</sup> in the first season and second season, which corresponded to 78.97 and 57.86%. For the first season, increments were observed in all treatments that received zinc doses with increases of 48.70, 31.22, 14.30, and 15.93% for 1, 2, 3, and 4 L of Zintrac<sup>®</sup> ha<sup>−1</sup> compared to the dose of 0 L ha<sup>−1</sup>. On the other hand, in the second season, there was an increase only in the dose of 1 L ha<sup>−1</sup> of Zintrac<sup>®</sup>, which corresponded to 51.3% in the net yield (ha<sup>−1</sup>) of the dose of 0 L ha<sup>−1</sup>. Therefore, foliar zinc oxide fertilization was economically viable for the yam crop, obtaining higher economic indices at the dose of 1 L ha<sup>−1</sup>. The highest cost for growing yams is using a dose of 4 L ha<sup>−1</sup> of Zintrac<sup>®</sup>, totaling USD 6977.59 (first season) and USD 6868.33 (second season)
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