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Journal : AGRICOLA

Respons Pertumbuhan dan Produksi Tanaman Jagung (Zea Mays ssp. mays) akibat Aplikasi Dosis Pupuk Kalium dan Nitrogen pada Tanah Kering Masam dengan Pemberian Amelioran Rochman, Fajar; Priyadi, Priyadi; Rahmadi, Rizky
AGRICOLA Vol 13 No 1 (2023): AGRICOLA
Publisher : Universitas Musamus, Merauke, Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35724/ag.v13i1.5054

Abstract

The prospect of increasing productivity of drylands as a food provider is very promising, especially for maize production, which plays an equally important role as a food crop compared to rice. However, in general, the quality of drylands in Indonesia is relatively low. This study aims to further investigate the application of dolomite combined with inorganic fertilizers such as rock phosphate, K and N fertilizers to improve the quality of dry soil, which has the potential to increase maize productivity. The research was conducted at the Seasonal Crop Field of Lampung State Polytechnic from October to December 2022. The study used an experimental method with a Completely Randomized Block Design (CRBD) with 6 treatments and 6 replications. The treatments tested included: k0: without fertilizer; k1: KCl fertilizer dose of 50 kg/ha; k2: KCl fertilizer dose of 100 kg/ha; k3: KCl fertilizer dose of 150 kg/ha; n1: Urea fertilizer dose of 200 kg/ha; n2: Urea fertilizer dose of 250 kg/ha. The results of the study showed that the treatment of KCl fertilizer dose of 100 kg/ha significantly showed the best response on the average parameter of Wet Grain Weight per Cob, Dry Grain Weight per Cob, and Weight per Cob Without Corn Husk of Corn Plants
Dominansi dan Keragaman Gulma Pada Tanaman Jagung (Zea mays L.) dengan Sistem Tanam Konvensional dan Jajar Legowo Rahmadi, Rizky; Rochman, Fajar; Dulbari, Dulbari; Priyadi, Priyadi; Sari, Resti Puspa Kartika; Widyani, Dimas Prakoso; Ashadi, Ibnu
AGRICOLA Vol 14 No 2 (2024): AGRICOLA
Publisher : Universitas Musamus, Merauke, Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35724/ag.v14i2.6015

Abstract

The presence of weeds is a significant factor that contributes to the decline in maize yield. To reduce yield loss, appropriate weed control methods must be applied. The first step in determining these methods is to identify weed dominance and diversity. This study aims to identify the dominance and diversity of weeds in three corn planting systems: conventional, jajar legowo 1:2, and 1:3 spacing. The research was conducted at the Teaching Farm Polinela Organic Farm in Lampung Province from November to December 2023. Vegetation analysis was performed using a 0.5 m2 quadrant randomly placed on 10 plots of land. The dominance value of weeds was determined using the Summed Dominance Ratio (SDR) value, while the diversity of weeds was measured using the Shanon-Wiener index value (H'). The study found that the conventional field had 9 weed species, the 1:2 legowo field had 8 weed species, and the 1:3 legowo field had 5 weed species. Ageratum conyzoides was the dominant broadleaf weed species in both the conventional corn field and jajar legowo 1:2, while Asystasia gangetica dominated the jajar legowo 1:3 corn field. The weed diversity index analysis results for the three corn planting systems fall into the medium category. Specifically, the results are 2.12 for conventional corn fields, 1.94 for 1:2 jajar legowo corn fields, and 1.3 for 1:3 jajar legowo corn fields.