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

Dokuchaev Soil Bulletin. 2021;(108):104-136.

Nurdin1, M. L. Rayes2, Soemarno2, Sudarto2, E. Listyarini2, C. Agustina2, R. Rahman1, A. Rauf3, J. Husain4

1Department of Agrotechnology, Gorontalo State University, Indonesia

2Department of Soil Science, Brawijaya University, Indonesia

3Department of Agribusiness, Gorontalo State University, Indonesia

4Department of Soil Science, Sam Ratulangi University, Indonesia

Abstract

Ten representative pedons from the Bulia micro watershed of Gorontalo Province, Indonesia, were characterized and classified to determine its land quality (LQ) class. Angular blocky, sticky, plastic consistencies and a hard consistency prevailed in the soil structure. In the alluvial plains the soil texture is dominated by the clay fraction, while in the hills and volcanic mountains the sand fraction is dominated. The soils in the Bulia micro watershed also have acid to neutral reaction, with the range of very low to high OC (organic carbon) levels, the reserve of exchangeable bases was dominated by Ca2+ in two series patterns, namely: Ca2+ > Mg+ > Na+ > K+ and Ca2+ > Na+ > Mg+ > K+, cation exchange capacity (CEC) ranged from low to very high, and the base saturation varied from moderate to very high. The alluvial plain is represented by Inceptisol in P1 and Typic Humustepts (P7), also by Oxic Humustepts (P3), then Mollisol on P4 (Typic Argiudolls) and Typic Haplustolls (P6), Alfisol on P5 (Typic Paleustalfs). Entisol on P2 (Typic Ustipsamments) was found in volcanic mountains and P9 (Typic Paleustolls) P8 (Ultic Paleustalfs), P10 (Inceptic Haplustalfs) are typical of volcanic hills. On the alluvial plains the land was categorized as the LQ class II, III and IV, the volcanic mountains were the LQ class IV, while the land on the volcanic hills was categorized as the LQ class VI. River bank erosion on the land river terraces can be held by the manufacture of gabions, talud, cliff reinforcement plants and terraces. The soil temperatures and high clay content can be regulated by mulching and organic materials.

Keywords: Characterization, classification, soils of Indonesia, land quality, the Bulia watershed

Scopus Non Q: https://doi.org/10.19047/0136-1694-2021-108-104-136

AGROTEK: Jurnal Ilmiah Ilmu Pertanian,  Vol 5, No 1 (2021)

Nikmah Musa1, Wawan Pembengo1, Nurdin1, Nursiah Oktrizqia Adri Akis2

1JurusanAgroteknologi, Faperta UNG, Gorontalo

2Program Studi Agroteknologi, Faperta UNG, Gorontalo

Abstract

Lettuce (Lactuca sativa L.) is a vegetable that has high economic value and beneficial for health but in its cultivation, there are still obstacles, especially related to the plant water needs and dosage of fertilizer. This study aims to examine the growth and yield of lettuce and the interaction between water and fertilizer application time intervals in Tilote Village, Gorontalo District. This research was carried out in an acclimatization room using a randomized block design with two factors, namely the water supply interval factor (interval 2 days-A1, interval 3 days-A2) and the second factor fertilizer dosage (50 kg ha-P1, 100 kg/ha-P2). Growth parameter data (plant height, number of leaves, leaf length and leaf width) as well as plant yield (wet weight, leaf weight and percentage of leaf weight to base weight) were analyzed by ANOVA and further tested with the DMRT test at 50% level. The results showed that the water supply interval and the dosage of fertilizer has significantly affect to growth and yield of lettuce. There were an interaction between the water supply interval and the dose of fertilizer that affects the growth and yields of lettuce with the best combination were interval of 2 days and fertilizer dosage of 100 kg/ha. 

Keywords: Growth, yield; water need; fertilizer; dosage; lettuce

Sinta 4: https://doi.org/10.33096/agrotek.v5i1.153

PEDULI, vol. 5, no. 1, pp. 93-101, Sep. 2021.

Nurdin, Agustinus Moonti, Siswatiana Rahim Taha, Fitriah Suryani Jamin, Rival Rahman

Universitas Negeri Gorontalo

Abstract

Provision of organic fertilizers was done as an alternative to reduce dependence on inorganic fertilizers, even though they were substantive in nature. Apart from being one of the solutions to the scarcity of subsidized fertilizers, it was also an effort to increase agricultural production, as well as protect the plant environment from pollution and maintain soil fertility. The production of organic fertilizers from local agricultural waste has been proven and successfully carried out by farmer groups based on visual criteria that are fine-textured, black in color and smell of soil. Testing of the nutritional content of organic fertilizers has been carried out and the results prove that the minimum technical requirements for solid organic fertilizers have been met, so that larger scale production can be carried out by farmer groups. To follow up on this activity, suggestions that need to be made include: (a) the potential for agricultural waste from sugarcane and oil palm plantations that has not been used in the manufacture of organic fertilizers can be used as raw material, so that it will enrich the nutritional content and the novelty of this organic fertilizer; (b) the need for licensing for the production of organic fertilizer for farmer groups requires assistance from the instant dan associated with these authority dan regulation; and (c) the need for good and attractive packaging, so that it will market-oriented.

Key words: Quality, organic fertilizer, local raw materials.

Sinta 5: https://doi.org/10.37303/peduli.v5i1.269

Jurnal Agroteknotropika, Vol 10, No 2 (2021)

Abdul Kadir Lasiki1, Nurdin2, Indriati Husain2

1Alumni Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo

2Dosen Program Studi Agroteknologi Fakultas Pertanian Universitas Negeri Gorontalo

Abstract

This Studi aimed to determine the growth and yield of hybrid corn in several slope classes and fertilization doses in Bumela Village, District of Gorontalo. This research took place in Bumela Village, District of Gorontalo. Implementation time started from December 2019 to April 2020. This stdyused a Separate Plot Design (SPD) with the main plots of slope classes, namely: L1 or flat slope (0-8%), L2 or undulating slope (8-15%), L3 or hilly slopes (15-35%), and L4 or steep slopes (>35%). Meanwhile, the sobplots are are the dosage of NPK fertilizer (compoud) consisted of P0 or control (0 kg/ha), P1 (50 kg/ha), P2 (100 kg/ha), P3 (150 kg/ha), and P4 (200 kg/ha). The treatment was repeated  3 times resulted in 60 treatment combinations, data analyisis was conducted using Duncan Multiple Range Test at the 5% significance level. The result showed that the class of flat slope (0-8%) and no fertilizer affected the growth of corn. There was an interaction between slope class (0-8%) and no fertilizer on the growth and yield of corn.

Keywords: slope class, fertilizer dosage, hybrid corn variety.

https://ejurnal.ung.ac.id/index.php/JATT/article/view/13459