ABSTRAKThe study was conducted in Selaru Island, West Southeast Moluccas Regency in an area of 32,217 ha. The research objective was to determine the land suitability and proposed land utilization of Selaru Island for development of food crops. The results showed that Selaru Island has a rather suitable (S2) and marginally suitable (S3) for six crops (upland rice, corn, peanuts, mungbeans, sweet potato, and caladium) covering an area of 19,330 ha and not suitable permanent (N2) for the six crops covering an area of 3,905 ha, while the area of 8,982 ha partly classified accordingly (S3) to plant upland rice and calladium and partially classified as not suitable (N1 and N2) for corn, peanuts, mungbeans, and sweet potatoes. The main limiting factor to the primary land use for food crops in Selaru Island, West Southeast Moluccas Regency among others are the temperatures (the average annual temperature is high), rooting medium (soil solum is shallow), nutrient retention (soil pH is rather alkaline to alkaline), erosion hazard level is moderate, and terrain (wave, rocks on the surface of the soil, and rock outcrop).The proposed land utilization of Selaru Island for food crops based on land suitability classes are (1) food crops of upland-1 with the main commodities of corn, mungbeans, uwi/kumbili and caladium an area of 5,299 ha, (2) food crops of upland-2 with the main commodities of upland rice, uwi/kumbili and caladium an area of 8,982 ha, and (3) food crops of upland-3 with the main commodities peanuts and mungbean an area of 14,031 ha. Development of food crops in Selaru Island need to consider the priority scale factor, the level of compliance, and social culture of the local community.Keywords: Food crops, land suitability, limiting factor, proposed land utilization, Selaru Island Penelitian dilakukan di Pulau Selaru, kabupaten Maluku Tenggasra Barat pada areal seluas 32.217 ha. Tujuan penelitian adalah untuk mengetahui kelas kesesuaian lahan dan arahan penggunaan lahan Pulau Selaru untuk pengembangan tanaman pangan. Hasil penelitian menunjukkan bahwa Pulau Selaru memiliki lahan yang agak sesuai (S2) dan sesuai marginal (S3) untuk enam jenis tanaman pangan (padi gogo, jagung, kacang tanah, kacang hijau, ubi jalar, dan keladi) seluas 19.330 ha dan yang tidak sesuai permanen (N2) untuk keenam jenis tanaman pangan seluas 3.905 ha, sedangkan lahan seluas 8.982 ha sebagian tergolong sesuai (S3) untuk tanaman padi gogo dan keladi dan sebagian tergolong tidak sesuai (N1 dan N2) untuk tanaman jagung, kacang tanah, kacang hijau, dan ubi jalar. Faktor pembatas utama penggunaan lahan Pulau Selaru, Maluku Tenggara Barat ntuk tanaman pangan antara lain adalah temperatur tinggi, media perakaran (solum tanah dangkal), retensi hara (pH tanah agak alkalis sampai alkalis), tingkat bahaya erosi sedang, dan terrain (berombak, batuan pada permukaan tanah dan singkapan batuan). Arahan penggunaan lahan Pulau Selaru untuk tanaman pangan berdasarkan kelas kesesuaian lahan adalah (1) tanaman pangan lahan kering-1 dengan komodit...
Rate of fertilizer that should be applied to rice soil based on Site Specific Nutrient Management (SSNM) depends on indigenous nutrient supply, its recovery efficiency, and the amount of nutrients requirement to achieve the yield target. Research on nutrient omission plot was conducted in farmers irrigated land on Waeapo plain, Buru Island. In this area, N, P, and K were the main limiting factors of rice growth and yield. To overcome the constraint, this assessment was conducted to determine the indigenous supply of N, P and K and optimal target of rice productivity. Results of this assessment showed that the average of rice optimum productivity (Mg grain water content/w.c. 14% ha-1) in Waeapo plain was 6.55 Mg DGM (Dry Grain Milled) ha-1, with range from 5.6 to 7.3 Mg DGM ha-1 depended on the indigenous supply of N, P and K. The average value of the indigenous N, P and K supplies in Waeapo plain Buru was 65.59 kg N ha-1, 13.70 kg P ha-1 and 78.65 kg K ha-1, respectively while average productivity of rice on that indigenous N, P and K supplies was 5.05, 5.96 and 6.05Mg DGM ha-1, respectively. The value of indigenous nutrient supply of this nutrient can be used as a basis of fertilizer recommendation with the SSNM concept. Keywords: Indigenous nutrient supply; nitrogen; phosphorus; potassium; Site Specific Nutrient Management [How to Cite: Andriko NS and MP Sirappa. 2014. Assessment of Indigenous N, P and K Supply for Rice Site Specific Nutrient Management in Buru Regency. J Trop Soils 19: 151-159. Doi: 10.5400/jts.2014.19.3.151]
Indonesia dominates about 76% of nutmeg production and export in the world, where around 28.26% is produced in North Moluccas and 24.25% of its from North Halmahera. The objectives of this study were to reduce the biotic stress, increase the yield and improve the quality of the nutmeg produced by Tarakani Farmer Group in Galela District. (1) the Morphology of dry fruit rot disease in each stratum and (2) nutmeg cultivation system collected through interviews; and (3) climatic data, including temperature, and rainfall obtained from the Meteorology, Climatology, and Geophysics Agency of Galela District. This study was conducted at west Galela District and Tarakani Farmer Group. The farmers implemented the sanitation techniques of the crops; i.e.: pruning, collection and pile up/bury of the dropped fruits and fumigation by burning some leaves of local trees and biotic stress be controlled. During one year a grade A of nutmeg increased from 5.7 tons to 37.6 tons or increased from 17.6% to 38.2%. Nutmeg grade C reduced from 40% to 25%%. This effort will still be forwarded by utilizing biological agents to reduce biotic stress, such as Trichoderma spp. to control fungal pathogens and Bacillus thurigiensis to pest control.
<p>The nettle caterpillars pest <em>Thosea monoloncha</em> (Limacodidae: Lepidoptera) has attacked the coconut plant in Tolonuo Island, North Halmahera district, North Maluku Province with the intensity of attacked varied from light minor damage to severe damage. This research purpose is to control the population of nettle caterpillars <em>T. monoloncha </em>and the response of farmers to technology using <em>Nucleo Polyhedrosis Virus</em> (NPV). The study was conducted from December 2014 to November 2015. The stages of this study are consisted of (a) observation of pest population T. monoloncha, (b) determination of plant damage intensity and (c) farmerd response to control technology. The results showed that the application of NPV extract can decrease the population of coconut pest T. monoloncha, the intensity of the damage decrease from severe, heavy and moderate to light damage. In additon, it also increase the amount of frond and coconut production from 14 to 45 nuts per tree. Farmers' response to various aspects of technology varied from 63.5-97.5%.</p><p> </p><p align="center"><strong>ABSTRAK</strong></p><p align="center">Hama ulat api <em>Thosea monoloncha </em>(Limacodidae: Lepidoptera) telah menyerang tanaman kelapa di Pulau Tolonuo, Kabupaten Halmahera Utara, Provinsi Maluku Utara dengan intensitas kerusakan bervariasi dari ringan sampai sangat berat. Penelitian bertujuan untuk mengendalikan populasi hama ulat api <em>T. monoloncha </em>dan respon petani terhadap teknologi pemanfaatan <em>Nucleo Polyhedrosis Virus</em> (NPV).<strong> </strong>Penelitian dilaksanakan pada bulan Desember 2014 sampai November 2015. Hasil penelitian menunjukkan bahwa aplikasi ekstrak NPV dapat menurunkan populasi hama kelapa <em>T. monoloncha</em><em>,</em> menurunkan intesitas kerusakan dari kerusakan sangat berat, berat dan sedang menjadi kerusakan ringan, meningkatkan jumlah pelepah dan buah kelapa dari 14 butir menjadi 45 butir per pohon. Respon petani terhadap berbagai aspek teknologi berada pada kisaran 63,5-97,5%. </p>
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