Jurnal Teknologi Lingkungan, 13(3), 2012: 245-252

Nurdin

Program Agroteknologi, Fakultas Pertanian Universitas Negeri GorontaloJl. Jend Sudirman 6 Kota Gorontalo 96122

Abstract

Upland is one of land potentials for maize development, but most farmers were using upland without soil conservation, so the soil erosion is difficult controlling and productivity is decreasing. This research was aimed to find of soil conservation technique combinations which can minimize soil erosion and rising of maize yields. This research was carried out in Biyonga Sub-Watershed of Gorontalo Regency. Experimental was conducted in afactorial random block design with2 main factors, where first factor was contour cultivation and the second was strip cropping which each factors consisted of 5 treatments for manure and mulching with 3 replicates. Erosion box and their soil collector were used to measure of soil erosion. Results showed that contour cultivation is ±1.24 higher than strip cropping toincrease maize yields, but soil erosion was ±1.20 higher than strip cropping. The highest of maize yield was 5.82 ha-1 tahun-1 and their soil erosion was 1.34 ton ha-1 tahun-1. Soil erosion on the strip cropping was only 1.08 tonha-1 tahun-1 although maize yields were only 4.80 ton ha-1. The best dosage for manure and mulching were 10 ton ha-1 and 12 ton ha-1.

Keywords: erosion, strip, cropping, upland, maize

Terakreditasi LIPI: https://s.id/21Zkw

Jurnal Agroteknotropika, Vol 1, No 2 (2012)

Hermanuddin1, Nurdin2, Fitriah S. Jamin2

1Mahasiswa Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

2Staf Pengajar Jurusan Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

Abstract

The aim of this study was to determine (1) the effect of N, P, and K fertilizers on the maize growth and (2) the best treatment combinations on the maize growth. The fertilizers method using minus one test in randomized block design pattern with four treatments and three replications. Dosages of each treatment were 160 kg Urea, 54 kg TSP, and 90 kg KCl. The results of this research showing that the minus one test of N, P, and K fertilizers has significant effect to plant high on 14 days after planting (DAP), 42 DAP, and 56 DAP, but has not significant effect on 28 DAP. This pattern was the same with leaf color parameters. , for leaf numbers has significant effect on 28 DAP only. The best treatment combination was N+K treatment or minus P.

Keywords: minus one test, N, P, K, fertilizer, growth, maize

https://ejurnal.ung.ac.id/index.php/JATT/article/view/903

Jurnal Agroteknotropika, Vol 1, No 2 (2012)

Febrian F. R. Aluwi1, Nurdin2, Fitriah S. Jamin2

1Mahasiswa Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

2Staf Pengajar Jurusan Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

Abstract

The objective of this research was to study the respons of N, P, and K fertilizers and the best combination of it on the maize yields. The experimental design was following random block design that consist of 4 treatments with 3 replications, so there are 12 plot units. Dosages of each treatment were 160 kg Urea, 54 kg TSP, and 90 kg KCl. The result of this research showing that minus one test has significant effect to stem length, stem diameters, and all dry weigh, for 100 gain weigh has not significant effects. The best treatment combination was N+K treatment or minus P.

Keywords: minus one test, N, P, K, fertilizer, yield, maize

https://ejurnal.ung.ac.id/index.php/JATT/article/view/905

Jurnal Agroteknotropika, Vol 1, No 2 (2012)

Nelson Pomalingo1, Nurdin2

1Guru Besar Kependukan dan Lingkungan Hidup Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96122

2Staf Pengajar Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96122

Abstract

Land utility for physic buildings on Gorontalo State University campus I has shown rasing significant trends. Whereas, the land was originally rice field productively and water catchments area. Consequently, its function is reduced due to the infiltration of water hampered. This study aimed to (a) determine the amount of soil infiltration rate, and (b) determine the amount of soil permeability. The study was conducted on six months in the campus 1 Gorontalo State University areas. The equipment consists of Guelph permeameter, rol meter, water bag, stop watch, soil bor and raffia. s, the materials consist of water and soil samples. Infiltration measurements carried out in a transect from the south to the north lines. Measurements will be performed at every five meters with two measurements (0-10 cm and 10-20 cm). On existing lines any building or standing crop, the measurement will be carried out on one side to detect the effect of distance and the soil variability. Parameters observed include water infiltration, and soil permeability. The result of this research shown that infiltration rate (i) and soil permeability (Ks) at campus 1 Gorontalo State University areas classified as very rapid. s, the highest of infiltration rate and soil permeability values was to 140 m distance or point 28 and the lowest was to 170 m distance or point 34.

Keywords: Infiltration, permeability, soil, water absorption.

https://ejurnal.ung.ac.id/index.php/JATT/article/view/906

Jurnal Agroteknotropika, Vol 1, No 2 (2012)

Hariyanto Mayang1, Nurdin2, Fitriah S. Jamin2

1Mahasiswa Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

2Staf Pengajar Jurusan Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo, Jl. Jend. Sudirman No. 6 Kota Gorontalo 96128

Abstract

This study aimed to determine the N, P, and K nutrients uptakes of maize crops in Dutohe of Bone Bolango regency. Te research was carried out in Dutohe Village of Kabila Distric of Bone Bolango regency for about 6 months. The experimental design was following randomized block design that consist of 4 treatments (P+K, N+P, N+K) with 3 replications, so there are 12 plot units. Dosages of each treatment were 160 kg Urea, 54 kg TSP, and 90 kg KCl. The result from the experiment showed that minus one test has not significant effect to N and P uptakes, but has significant effect to K uptake.

Keywords: N, P, K, fertilizer, uptake, maize

https://ejurnal.ung.ac.id/index.php/JATT/article/view/908