Determination of Land Suitability Criteria for Maize Hybrid in Boalemo Regency Based on Optimum Yield and Selected Land Quality

Abstract

The significant effect of land quality on maize production has not been fully considered in the existing land suitability criteria. Therefore, this study aims to determine land suitability criteria for hybrid maize in Boalemo Regency based on the optimum yield and land quality. It was carried out in Boalemo Regency, Indonesia, where the land unit of 67 units was surveyed to obtain land characteristics data. A partial least square of structural equation model (PLS-SEM) with SmartPLS 8.0 was used to select a robust land quality controlling hybrid maize yield, while the boundary line method was used to determine optimum yield and differentiating of land suitability criteria. The result showed that land qualities that define the optimum yield of hybrid maize were root conditions, nutrient availability, nutrient retentions, land preparation, and erosion hazard. The soil characteristics were effective depth, coarse material, organic C, total N, K exchangeable, slopes, soil erosion, rock outcrops, and surface rocks. Furthermore, the highest optimum yield of 8.54 ton/ha was achieved by the total N and slopes for a very suitable class (S1), while the lowest of 5.58 ton/ha was obtained by exchangeable K for class S1. This showed that the combination of PLS-SEM and boundary line analysis was a better approach to developing new land suitability criteria for hybrid maize.

Evaluasi Kesesuaian Lahan untuk Tanaman Jagung (Zea mays L.) di Kecamatan Dulupi Kabupaten Boalemo

“…Provinsi Gorontalo merupakan salah satu sentra Produksi jagung di Indonesia, dimana jenis hibrida adalah yang paling banyak dibudidayakan. Produksi jagung di provinsi ini mencapai 1,8 juta ton pada tahun 2021 (BPS Provinsi Gorontalo, 2022) dan komoditas ini memiliki keunggulan dan daya saing (Nurdin et al, 2023). Salah satu kabupaten yang merupakan penghasil jagung yaitu kabupaten boalemo dengan luas panen sebesar 29.224 hektar.…”

Analysis of degraded land suitability and regional comparative advantages for maize development in the Gorontalo sustainable agriculture areas, Indonesia

“…Lands that naturally had a low land suitability class could be improved with technology (Ritung et al, 2011). The limiting factor for nutrient retention and available nutrients were improved through the addition of organic matter (Nursyamsi et al, 2002;Wirosoedarmo et al, 2012) andNPK fertilizers (Imanudin et al, 2020), while the coarse material was improved through soil cultivation (Elfayetti and Herdi, 2015). The limiting factor of soil drainage was enhanced with the use of gulud and surjan, while slopes and soil erosion were enhanced using terracing (Bahtiar et al, 2012;Husain et al, 2012;Wirosoedarmo et al, 2012).…”