Jurnal Agroteknotropika, Vol 11, No 2 (2022)

Sulistio van Gobel1, Nurdin2, Fitriah Suryani Jamin2

1Alumni Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo

2Dosen Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo

Abstract

This study aims to determine the effect of land use change toward land quality and production. This research is conducted in Bolangitang Timur Sub-district, Bolaang Mongondow Utara District starting from July 04 to September 11, 2020. This study applies the minipit method for soil sampling, and questionnaires that are distributed to farmares who did land use change in the research area. There are 17 samples of soil and 14 samples of questionnaires which represent the research area, and this study uses secondary data that obtain from image and map of regional spatial planning. The results show that the quality of land that affects production are oC temperature, Rainfall, Wet Month, Dry Month, CEC (Cation Exchange Capacity), and Base Saturation, Factors that influence land-use change are land converted due to public donation, land converted due to economic grants, land converted due to building houses, the impacts of land use change that occur are the quality of agricultural land and crop production is reduced.

Keywords: Land use, change, impact, land quality, production.

https://ejurnal.ung.ac.id/index.php/JATT/article/view/18977

Jurnal Tanah Dan Sumberdaya Lahan, 9(2), 2022: 223–230.

Andri Husain, Nurdin, Sutrisno Hadi Purnomo

Jurusan Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo

Abstract

Maize local of Motorokiki variety is a Gorontalo germplasm which is cultivated more dominantly on sloping land with low productivity. This study was aimed to determine the growth and yield of local maize on several slope classes and doses of NPK fertilizer, and their combination on the growth and yield of local maize in Payu, Gorontalo. This study used a split-plot design with the main plot of slope class and sub-plots of NPK fertilizer dosage. The main plot of the slope class consisted of flat slopes (0-8%), wavy (8-15%), hilly (15-35%) and mountainous (>35%), while sub-plots with NPK fertilizer dosage consisted of 0 kg ha-1, 50 kg ha-1, 100 kg ha-1, 150 kg ha-1 and 200 kg ha-1. The parameters measured included plant height, leave numbers, male and female flowering age, cob length, and weight of corn kernels. Data were analyzed by the Duncan Multiple Range Test (DMRT) at 5% level. The results showed that maize growth was significantly affected by slope class and NPK fertilizer dosage with the best combination of wavy slope and 50 kg ha-1 fertilizer dosage. In maize yield, only maize seed weight was significantly affected by slope class, while in NPK fertilization only on male and female flowering age with the best combination of flat slope class and 100 kg ha-1 fertilizer dosage.

Keywords: slope, fertilizer doses, local maize, maize yield

Sinta 3: https://doi.org/10.21776/ub.jtsl.2022.009.2.3