Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD 2020), Series: Advances in Biological Sciences Research, Atlantis Press.

Publication Date: 11 June 2021

ISBN: 10.2991/absr.k.210609.068

ISSN: 2468-5747

Nurdin1, M. L Rayes2, Soemarno2, Sudarto2

1Agrotechnology Department, Agriculture Faculty, Gorontalo State University

Jl. Jenderal Sudirman No. 6 Kota Gorontalo-Indonesia. 96122

2Soil Science Department, Agriculture Faculty, Brawijaya University

Jl. Veteran Kota Malang, JawaTimur-Indonesia. 65145

Abstract

Increase national maize production has not been followed by an increase in maize productivity per unit area because maize was grown on land that was not suitable with these land quality. This study aims to determine the land quality that control of local maize production. This research was conducted at the Gorontalo Regency. A total of 33 mapping units had been established containing data of soil properties, climate and terrain divided into land quality, as well as data of local maize production. A partial least square of structural equation models (PLS-SEM) analysis was used to determine the land quality and characteristics that control of local maize production through testing the validity and reliability of variables, as well as testing structural models. The results showed that the all manifest variables were valid and able to explain well the latent variables, except for texture, cation exchange capacity, and base saturation. Furthermore, the latent variables temperature, water availability, oxygen availability, nutrient retention, nutrients availability, sodicity, erosion hazard, flood hazard, and land preparation used has good composite reliability and high reliability because of the composite reliability and alpha cronbach >0.6, except for rooting media. Land quality that control of the local maize production were the oxygen availability (X1), rooting media (X2), nutrient retention (X3), nutrients availability (X4), erosion hazard (X5), and land preparation (X6) with the best equation: Y = 1.805 + 0.276X1 + 0.303X2 + 0.353X3 + 0.346X4 - 0.337X5 - 0.303X6. The land characteristics that control of the local maize production were drainage (X1), coarse material (X2), effective depth (X3), pH KCl (X4), C-organic (X5), total N (X6), available K (X7), slope (X8), soil erosion (X9), surface rock (X10) and rock outcrop (X11) with the best equation: Y = 2.447 + 0.187X1 - 0.212X2 + 0.153X3 + 0.349X4 + 0.166X5 + 0.169X6 + 0.313X7 - 0.352X8 - 0.230X9 - 0.237X10 - 0.187X11.

Keywords: Quality, characteristic, land, production, maize, local

https://doi.org/10.2991/absr.k.210609.068

https://www.atlantis-press.com/proceedings/isplrsad-20/125957716