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I Ketut Ngawit, I Ketut
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Studi Awal Perbanyakan Cacao (Theobroma cacao L.) Asal Kebun Rakyat Lombok Utara: Pertumbuhan Bibit pada Media Tanah dengan Pupuk Kandang Sapi Santoso, Bambang Budi; Ngawit, I Ketut; Jayaputra, Jayaputra
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 4 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i4.752

Abstract

Cocoa (Theobroma cacao L.) is an economically valuable crop, especially in the chocolate industry. However, cocoa seedling productivity in Indonesia faces challenges such as low-quality seedlings and suboptimal cultivation practices. This study aimed to evaluate the effect of cow manure on the growth of cocoa seedlings from smallholder farms in North Lombok, focusing on its potential as a sustainable nursery management practice. The experiment was conducted using a randomized complete block design with five treatments involving different ratios of cow manure and standard nursery media (topsoil and sand). Seedling growth parameters such as germination rate, seedling height, stem diameter, leaf number, and biomass accumulation were measured at 30, 60, and 90 days after planting. The results showed significant improvements in all growth parameters with the application of cow manure compared to the control. The best performance was observed at 300 g of cow manure per polybag, resulting in a maximum seedling height of 35.2 cm, 14.2 leaves per seedling, and a dry biomass of 34.7 g. The cow manure enhanced soil fertility, improved water retention, and supported microbial activity, contributing to better seedling vigor. In conclusion, cow manure is a viable organic amendment for cocoa seedling production, especially in resource-constrained farming systems
Efisiensi Pengusahaan Tembakau Melalui Peningkatan Aplikasi Pupuk Organik dan Pengurangan Pupuk NPK di Desa Mujur Kecamatan Praya Timur Kabupaten Lombok Tengah NTB Ngawit, I Ketut; Supeno, Bambang; Jihadi, Amrul; Azhari, Anjar Pranggawan
Alamtana: Jurnal Pengabdian Masyarakat UNW Mataram Vol 5 No 3 (2024): Edisi Desember 2024
Publisher : LPPM UNIVERSITAS NAHDLATUL WATHAN MATARAM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jaltn.v5i3.2321

Abstract

Masalah yang dihadapi petani tembakau saat ini adalah isue panas pupuk langka dan hargnya mahal. Oleh sebab itu maka, dilaksanakan program pengabdian kepada masyarakat, tujuan utamanya untuk meningkatkan pengetahuan dan keterampilan petani memproduksi pupuk organik dari kotoran hewan, limbah kandang ternak dan limbah pertanian yang tersedia cukup melimpah. Metode kegiatan tindak partisipatif, yang dilakukan bulan Juli 2024 sampai bulan Oktober 2024. Pelaksanaan penyuluhan dan pendampingan berjalan lancar dan sukses, terbukti partisipasi dan antusiasme petani yang semula rendah, dapat ditingkatkan setelah pelaksanaan pendampingan langsung di lapang mengenai praktek pembuatan pupuk organik, pembuatan ransum pakan ternak sapi dan demplot aplikasi pupuk organik pada tanaman tembakau. Kegiatan penyuluhan dan pendampingan dapat meningkatkan pengetahuan dan keterampilan petani mengelola tanaman tembakaunya lebih intensif melalui peningkatan aplikasi pupuk organik dan pengurangan aplikasi NPK secara bertahap. Pertumbuhan dan hasil tembakau terbaik diperoleh pada aplikasi pupuk organik 25 ton ha-1 ditambah pupuk NPK Ponska 100 kg ha-1, dengan total jumlah daun segar 34,75 lembar tanaman-1 dan total bobot daun segar tembakau mencapai 25,73 ton ha-1. Dosis aplikasi pupuk organik hasil produksi ini dianjurkan 25 ton ha-1 untuk tanaman tembakau dengan waktu aplikasi setelah pengolahan tanah.
Periode Kritis Jagung (Zea mays L.) Berkompetisi dengan Gulma di Lahan Kering Ngawit, I Ketut; Santoso, Bambang Budi; Azhari , Anjar Pranggawan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.858

Abstract

Research into the critical phase of weed competition in maize aims to determine weed control at the right time. The study used a randomized block design consisting of eight treatments with weed-free (WWF) and weed-free (WF) plant age periods up to 10, 20, 30, 40, 50, 60, 70, and 80 days after planting (DAP). Each treatment was randomly repeated in three blocks, resulting in 54 experimental units The observation parameters include weed population, dry biomass weight of weeds and maize, plant height, leaf area, ear length, ear diameter and dry weight of maize kernels per plot. Data analysis using analysis of variance and William's statistical test. The results of the study showed that the critical period for corn competition with weeds on dryland was about 20 - 30 DAP when the corn was planted. If weeds are removed after the plants are more than 30 days old, the harvest cannot be saved. Plants competing with weeds for 40, 50, 60, 70, and 80 days experienced yield reductions of 60.32%, 82.84%, 98.66%, 99.99%, and 99.99%, respectively. In contrast, plants that were only weed-free up to the age of 10, 20, and 30 days showed yield losses of 98.66%, 80.16%, and 61.40%, respectively. It is recommended to start controlling corn weeds on dry land 20 days after planting and to avoid weeding 30 days after planting.
Seed Bank Gulma Pada Beberapa Kedalaman Tanah Tegakan Jambu Mete di Lahan Kering Ngawit, I Ketut; Wangiyana, Wayan; Farida, Nihla
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.861

Abstract

The dynamics of weed invasion in cashew guava is influenced by the potential of the standing soil as a weed seed bank. Therefore, research was carried out which aimed to examine weed species that had not yet grown because environmental factors were not yet supportive. The first research used a descriptive method and collected data in the field using an exploratory survey method. The second research used an experimental method, by observing the potential of various soil depths of cashew stands as a weed seed bank. The research results showed that 17 weed families were found in cashew plantations, consisting of 2 Ciperaceae species, 9 Poaceae species and 21 broadleaf species. The highest diversity, population and ability to grow simultaneously Weed bank seed occurs at a soil depth of 0 ± 30 cm, then decreases at a soil depth of > 30 ± 40 cm and is very low at a soil depth of > 40 ± 50 cm. Seed bank weed species which are always dominant at various soil depths are dominated by poaceae and broad-leaf weeds so that the number of species, the percentage that grows and the dry biomass weight is significantly higher than that of sedge weeds. The size of the seed bank is determined by the combination of seeds produced by previously growing weeds. So weed seeds will remain a problem as long as there is a supplier for these seeds.
Pertumbuhan dan Hasil Tanaman Ubi Jalar Sambung Pucuk yang Ditanam pada Dua Sistem Tanam Supeno, Bambang; Ngawit, I Ketut; Haryanto, Hery; Muthahanas, Irwan; Jihadi, Amrul
Proceedings Series on Physical & Formal Sciences Vol. 8 (2025): Prosiding Seminar Nasional Fakultas Pertanian dan Perikanan
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v8i.1565

Abstract

Penyambungan (grafting) tanaman merupakan salah satu cara meningkatkan hasil tanaman, sebagaimana pada tanaman ubi kayu sambung (muhibat). Beberapa hasil riset menunjukkan bahwa bertanam ubi jalar dalam karung mampu meningkatkan hasil. Bagaimana untuk ubi jalar sambung pucuk (Apical grafting) dengan dikombinasikan sistem tanam apakah mampu meningkatkan hasil, belum banyak informasinya. Tujuan penelitian ini adalah untuk mengetahui tingkat hasil ubi jalar sambung pucuk pada dua sistem tanam. Penelitian ini dilakukan dengan metode ekperimental dengan percobaan lapangan yang dirancang dengan Rancangan Acak Kelompok (RAK) dengan dua faktor. Faktor pertama adalah sambung pucuk yang terdiri atas dua perlakuan, yaitu ubi jalar sambung pucuk kangkung hutan, Ipomoea fistulosa, (S1) dan non sambung (S0). Faktor kedua adalah sistem tanam terdiri dari dua perlakuan, yaitu sistem dalam Karung (K) dan sistem non karung atau bedengan (NK). Masing-masing perlakuan dikombinasikan sehingga diperoleh 4 kambinasi perlakuan dengan setiap kombinasi perlakuan diulang sebanyak 6 kali. Secara keseluruhan diperoleh 24 unit perlakuan dan data dianalisis dengan analisi sidik ragam taraf nyata 5%. Hasil penelitian menunjukkan bahwa pertumbuhan dan hasil ubi jalar sambung pucuk menunjukkan perbedaan yang nyata dengan kontrol baik yang ditanam dalam karung maupun dalam bedengan. Berat Ubi jalar sambung pucuk yang ditanam dalam karung (594,43 g/batang) dan bedengan (582,33 g/batang) menunjukkan tidak berbeda yang nyata, Hasil ubi jalar tanpa sambung yang ditanam dalam karung (1.258,58 g/batang) dan bedengan (749,55 g/batang) menunjukkan hasil terbaik (sangat nyata).
Studi kompetisi antara gulma teki dengan tanaman kacang tanah di lahan kering Ngawit, I Ketut; Azhari, Anjar Pranggawan; Jihadi, Amrul
Jurnal Agrotek Ummat Vol 12, No 2 (2025): Jurnal Agrotek Ummat
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jau.v12i2.30155

Abstract

The research aims to determine the competition index and the maximum number of sedge populations that can be tolerated by peanut. In this regard, research has been carried out using additive, substitution and dynamic experimental models. The research results showed that the competition index of sedge when peanuts were 60 DAP was 0.0659 so that sedge were able to reduce peanut yields by 6.590%. Meanwhile, at 90 DAP the competition index is 0.0733, so that sedge have the potential to reduce peanut yields by 7.330%. The peanut yield loss calculated based on the weighted dominance variable is in accordance with the predictions of the sedge competition index, namely the yield loss of peanuts aged 60 DAP and 90 DAP is 66.00% and 72.60%. Meanwhile, based on the prediction of the sedge competition index, peanut yield losses were 65.90% and 73.30%. The growth of peanuts aged 60 DAP and 90 DAP began to be suppressed by the presence of 5.43 and 5.24 clumps per m2 of sedge, while for peanuts to suppress sedge growth, a population of 7.58 and 5.30 clumps per m2 was required. The presence of sedge that can be tolerated by peanuts aged 60 HST ≤ 5.43 clumps per m2 and aged 90 DAP ≤ 5.24 clumps per m2. The relative space occupation (RSO) of sedge when peanuts are 60 DAP is higher than the RSO of peanuts, whereas when peanuts are 90 DAP, the RSO of sedge is lower compared to the RSO of peanuts, namely the population density of peanuts and sedges 5-35 clumps per m2, the RSO value of peanuts is 57.00 – 94.00%, while the RSO value of nut weeds is 47.40 – 92.00%, with a comparative value of 9.60 – 2.00%
Pengelolaan Tanah Tegakan Jambu Mete Melalui Penerapan Model Usahatani Ekologis Terpadu Di Dusun Lendang Mamben Desa Anyar Bayan Lombok Utara Ngawit, I Ketut; Jayaputra, Jayaputra; Azhari, Anjar Pranggawan; Jihadi, Amrul
Jurnal Gema Ngabdi Vol. 7 No. 1 (2025): JURNAL GEMA NGABDI
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jgn.v7i1.575

Abstract

Cashew tree plantations often experience fallow periods, causing the soil layer to be more easily eroded. As a result, the process of decreasing land productivity is happening more quickly. The right action to overcome this problem is to utilize the reciprocal relationship between plants and livestock to form an integrated ecological farming model. The purpose of this activity is to improve farmers' knowledge and skills in managing cashew nut plantations by implementing integrated ecological farming, processing agricultural waste, weeds and other forage for animal feed, and processing manure and livestock waste into organic fertilizer. The approach method used is participatory action in the form of direct training and assistance in the field from May 5, 2024 to November 6, 2024. The results of the activity showed that the implementation of training and mentoring for the application of integrated ecological farming models on cashew nut stands took place in an orderly, safe and smooth manner. The knowledge and skills of members of the Tunas Mekar farmer group, Lendang Mamben hamlet, Anyar Village, Bayan, North Lombok increased, as evidenced by their high participation, enthusiasm and enthusiasm in following the entire series of activities. The cultivation of peanuts and corn crops resulted in higher income and profits for farmers compared to the cultivation of long beans. In addition to being able to provide higher profits, the average BC-ratio for cultivating these two types of crops is also relatively higher compared to cultivating long beans, namely 2.81 for corn and 2.67 for peanuts
PENGARUH LAMA WAKTU KOMPETISI BERGULMA DAN BEBAS GULMA TERHADAP PERTUMBUHAN, HASIL, DAN PERIODE KRITIS KACANG TANAH DI LAHAN KERING Ngawit, I Ketut
AGROTEKSOS, Jurnal Ilmiah Ilmu Pertanian Vol 35 No 1 (2025): Jurnal Agroteksos April 2025
Publisher : Fakultas Pertanian Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/agroteksos.v35i1.1330

Abstract

Penelitian bertujuan untuk mendapatkan periode kritis kacang tanah berkompetisi dengan gulma di lahan kering. Metode eksperimental dengan rancangan acak kelompok terdiri atas sepuluh perlakuan periode tanaman bebas gulma dan bergulma umur 7, 14,21, 28, 35, 42, 49, 56, 63 dan 70 hari setelah tanam (HST). Parameter pengamatan, meliputi tinggi tanaman, jumlah cabang, luas daun, populasi gulma, bobot biomas kering tanaman dan gulma saat tanaman berumur 70 HST. Data dianalisis dengan analisis varian dan uji statistik William’s Test. Hasil penelitian menujukkan bahwa, periode kritis kacang tanah berkompetisi dengan gulma terjadi pada umur 21 - 28 HST. Keberadaan gulma yang dapat ditolerir pada kacang tanah di lahan kering hanya sampai umur 28 HST. Membiarkan gulma tumbuh pada periode umur tersebut dan baru melakukan penyiangan saat tanaman berumur 35 hari, menyebabkan pertumbuhan tanaman kacang tanah tidak bisa dikembalikan ke fase normal dan hasil tanaman tidak dapat diselamatkan. Kacang tanah yang berkompetisi dengan gulma selama 35, 42, 49, 56, 63 dan 70 hari mengalami penurunan hasil 80,07 %, 94,02%, 93,84 %, 99,09 %, 99,09 % dan 99,09 %. Sedangkan tanaman yang mengalami bebas gulma hanya sampai umur 7, 14 dan 21 hari mengalami penuruan hasil sebanyak 99,09%. Pengendalian gulma kacang tanah di lahan kering disarankan mulai pada saat tanaman berumur 21 HST dan hindari melakukan penyiangan setelah berumur 35 HST.
Pertumbuhan dan Hasil Tanaman Jagung Manis (Zea mays L. Saccharata Sturt.) Akibat Defoliasi Daun Pada Waktu dan Jumlah Yang Berbeda-Beda Ngawit, I Ketut; Santoso , Bambang Budi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 1 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i1.633

Abstract

One effort to increase sweet corn production is to defoliate the leaves at the right time. The problem is, how many leaves and when is the right time to defoliate them is not yet known. Therefore, research was conducted which aimed to determine the effect of the number of leaves and defoliation time interval on the growth and yield of sweet corn. The research was carried out in Nyurlembang Village, Narmada District, West Lombok Regency, in July - November 2022. Experimental research method with a factorial completely randomized block design grouped into three blocks. The first factor tested was the number of leaves defoliated, namely 0, 2, 4 and 6 pieces. The second factor is defoliation time, namely when the plants are 28, 42 and 56 days after planting.. Data were analyzed using farian analysis and continued with the LSD test at the 5% level. The results showed that defoliation of the number of leaves at different times had a significant effect on the growth and yield of sweet corn. There was no interaction between the two independent variables on the growth and yield of sweet corn. Defoliation of 2 leaves carried out when the plants were 28 HST had a negative effect on plant growth and yield and was not significantly different from no defoliation treatment. Defoliation of 4-6 strands carried out when the plants were 42 – 56 HST, was able to produce cob length, cob diameter, number of rows of cobs-1, weight of fresh cobs ha-1, dry shell weight ha-1; and the weight of 100 dry seeds is significantly higher than the defoliation of 2 leaves and 0 leaves, so it needs to be applied in future sweet corn planting efforts.
Prediksi Kehilangan Hasil Jagung (Zea mays L.) Akibat Kompetisi Gulma Poaceae di Lahan Kering Ngawit, I Ketut; Farida, Nihla; Azhari, Anjar Pranggawan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 1 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i1.634

Abstract

This research aims to determine the Poaceae weed species that have a significant effect on corn yield loss in dry land. The research method was descriptive and data collection using survey techniques in 10 sample plots measuring 1 m2 which were placed using random sampling. Observation parameters include the number of species and populations of weeds, the population of corn plants in plot-1 and the dry biomass weight of weeds and corn in plot-1. Quantitative data analysis by calculating relative density, relative frequency and relative dominance values ​​to calculate the importance value index and Summe Diminance Ratio (SDR). The results showed that the diversity, evenness, dominance and abundance of Poaceae weeds in corn plants in dry land was high. So it was found that seven species of weeds were dominant and continued to exist while the corn was growing, namely Paspalum vasginatum Sw., Leersia hexandra Sw., Digitaria longiflora (Retz.) Koel., Digitaria ciliaris (Retz.) Koel., Cynodon dactylon L., Eleusine indica Gaertn., and Panicum repens L. The competitiveness and ability to reduce corn yields of the weeds Paspalum vasginatum, Leersia hexandra and Digitaria longiflora are higher than other weeds, so that corn yield losses due to competition reach 16.45%, 7.48% and 4.40%. The weeds Brachiaria reptans, Axonopus compressus and Echinochloa colonum do not need to be controlled in corn after the plants are 45 DAT, because their competitiveness and ability to eliminate crop yields is very low.
Co-Authors Amrul Jihadi Anjar Pranggawan Azhari Anugrawati, Dwi Ratna Bambang Budi Santoso Bambang Supeno, Bambang Deona, Elisabet Berbara Bare Farida , Nihla HARYANTO, HERRY Hery Haryanto I Wayan Sudika Irwan Muthahanas Jayaputra, Jayaputra M. Sarjan, M. Nihla Farida Pande Komang Suparyana Pebriana, Ida Bagus Yogi Rabani, Muhammad Billy Rahman Santoso , Bambang Budi Suliartini, Ni Wayan Sri Suryaningsih, Liana Wayan Wangiyana Zaenal Abidin Zubaidi, Akhmad