Caraka Tani: Journal of Sustainable Agriculture
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Pengaruh Jarak Buangan Air Limbah Industri di Daerah Jaten-Karanganyar terhadap Kadar Chromium dalam Air dan Tanah Permukaan Saluran Air Pungkuk
No full textThe purpose of this research was to know the effect of industry waste water distance in Jaten-Karanganyar on Cr concentration in the water and soils at Pungkuk waterworks, also to know Cr concentration on that waterworks. The kind of this research was explorative research. The independent variable was treatment of take some water and soils sample at 0 km, 0.5 km and 1 km distance from pollutant source at Pungkuk waterworks and control.The result showed that distance where farther can affect Cr6+ concentration change in the soils and in the water were increase. The increasing of Cr6+ concentration change in the soils affected Cr6+ acumulation in the soils. The concentration of Cr6+ in the water has been influenced by value of water pH and EMC. Value of water pH also was influenced water EMC value. From sample analysis result showed that there was not polluted of heavy metal especially Cr6+ (between 0.017-0.093 ppm)
Sebaran Populasi dan Klasifikasi Resistensi Eleusine indica terhadap Glifosat pada Perkebunan Kelapa Sawit di Kabupaten Deli Serdang
Get PDFEleusine indica populations on oil palm plantations in Deli Serdang Regency have not been reported to be resistant to glyphosate. This study was aimed to report distribution and resistance classification of E. indica population on oil palm plantations in Deli Serdang Regency. The research was conducted on Weed Research Center in Faculty of Agriculture, Universitas Sumatera Utara from October 2016 until August 2017. This research used Randomized Block Design with recommended dose at 720 g a.i.ha-1 of glyphosate and three replications. Population ESU0 (from Politeknik Negeri Medan Ball Field) as a comparison. Data on average survival, mortality, dry weight, resistance classification of E. indica were analyzeds using IBM SPSS Statistics 20 software. The results showed that there were 12 E. indica populations classified as glyphosate-resistant (56.52%), 7 glyphosate-resistant developing (30.43%), and 4 populations classified as glyphosate-susceptible (13.04%) with the recommended dose at 720 g a.i.ha-1 from oil palm plantations in Deli Serdang Regency
Analisis Fenotipik dan Genotipik pada Abnormalitas Klon-klon Kelapa Sawit (Elaeis guineensis Jacq.) Hasil Kultur Jaringan
No full textResearch to analyze phenotype and genotype of oil palm clone developed from tissue culture which showed normal fruits and abnormal fruits through SDS-PAGE protein technique, and RAPD technique. Result indicated that protein with molecular weight of 100 kDa could differentiate genotype with normal fruit and abnormal fruit from all clones observed. Study on DNA through RAPD technique revealed primers which differentiated genotypes (male flowered genotype, normal fruited genotype, and abnormal fruited genotype) within clone and interclonal, i.e. OPC-07, OPN-16, and SC 10-56. Molecular weight of DNA on zymogram bands pattern were different on each clone.Genetic similarity among clones and among genotypes were high, more than 85% indicated close genetic distance. Dendogram based on matrix of genetic similarity indicated grouping on each genotype
PEMANFAATAN AZOLLA SEBAGAI SUMBER PAKAN PADA BUDIDAYA SISTEM GANDA AZOLLA-LELE
Get PDFCatfish farming is strongly influenced by the high price of feed, while azolla is a water fern that has a high nutritional value, can develop quickly and preferably by catfish as feed. The research aims to obtain the most appropriate combination treatment of Azolla inoculum dose and catfish seed size in dual system Azolla - catfish, which is able to provide the highest catfish yield. The experiments were performed in catfish ponds in completely randomized design (CRD) two factors, i,e azolla inoculum doses (250, 500 and 750 gm-1) and head circumference size of catfish seed (3, 4 and 5 cm). Dose of catfish seed is 2,000 head / m2. Variables observed were azolla fresh weight and catfish fresh weight at harvest. Azolla inoculum and catfish seed deployed together in catfish ponds and feeding with concentrate feed for one month. Azolla and catfish harvesting is done on the same day using a sieve. Once drained, Azolla and catfish were weighed separately to determine the severity. Data were analyzed by F test at the level of 95%, followed by Duncan's multiple range test (DMRT) if any significance influence. The results showed that the higher the azolla inoculum number, the higher azolla yield. The larger the size of catfish seed the higher catfish consumption to Azolla. Catfish seed size more than 4 cm will cause an imbalance between the speed of consumption of Azolla by the catfish and the azolla growth rate, so that Azolla be devoured by catfish
Pengaruh Waktu Pemupukan pada Dua Musim Tanam terhadap Karakter Wijen Sbr-1 dan Sbr-3 di Lahan Pasir Pantai
Get PDFSesame is recognized as healthy potential oil crops because can be used to control several diseases. Sesame can grow properly in light soil structure such as sandy coastal soil, however sandy soil is considered as unfertile one and therefore environmental friendly fertilizer application based on dung manure must be studied. The research toinvestigate the influence of application times of mixed fertilizer on the growth sesame in quality growth in coastal sandy soil both at rainy and dry seasons, therefore the experiment directly to the sandy field at the sandy coastal area of Keburuhan, Purworejo, Central Java. From the first stage, it could be said that the application of mixed fertilizer between chicken manure and inorganic fertilizer increasing tochlorophyll content, net assimilation rate, root volume sesame both in rainy and dry seasons
Hubungan Faktor Sosial Ekonomi Petani dengan Tingkat Difusi Inovasi Tumpangsari Jeruk dan Padi Sawah di Kecamatan Butuh Kabupaten Purworejo
No full textPenelitian ini bertujuan untuk mengetahui adanya hubungan antara faktor sosial ekonomi petani (umur, pendidikan formal, kosmopolitas, penguasaan lahan dan pendapatan rumah tangga), dengan tingkat difusi inovasi tumpangsari jeruk dan padi sawah di Kecamatan Butuh Kabupaten Purworejo. Metode dasar yang digunakan adalah metode deskriptif analitis dengan teknik suvei. Pengambilan sampel dilakukan dengan stratified random sampling sebanyak 45 sampel yang terbagi dalam 3 strata kelompok tani lanjut, madya dan utama. Metode analisis yang digunakan untuk mengetahui hubungan antara faktor sosial ekonomi petani dengan tingkat difusi inovasi tumpangsari jeruk dan padi sawah adalah uji koefisien korelasi rank spearman (rs). Hasil penelitian menunjukkan adanya hubungan yang nyata antara pendidikan formal dan kosmopolitas petani dengan tingkat difusi inovasi tumpangsari jeruk dan padi sawah. Sedangkan untuk variabel umur, penguasaan lahan dan tingkat pendapatan rumah tangga petani tidak berhubungan nyata dengan tingkat difusi inovasi tumpangsari jeruk dan padi sawah
Kualitas Air dan Sumbangan Hara dari Air Irigasi Sidorejo
No full textIrrigation water contributes several kind of nutrients to lowland rice and sometimes creates some problems. Research on irrigation water connected with fertilizers requirement and its effect on plant growth and crop yield was still limited. Water samples from Sidorejo irrigation in Central Java, at dry season in 2001, analyzed in laboratory its anion, cation, and water quality. The result showed that water quality from Sidorejo irrigation is suitable and did not give any unfavorable effect on the growth and yield of rice plant; which the values of SAR is very good, DHL and TDS were good-very good, Cl- is very good, percentage Na+ is moderate-good, SO4- is very good, and pH is normal. Irrigation water from Sidorejo irrigation were could supply 4,62 kg N/ha/season, 0,02 kg P/ha/season, 8,45 kg K/ha/season, 48,36 kg S/ha/season, 128,26 kg Ca/ha/season, and 34,89 kg Mg/ha/season respectively. The amount of nutrients supply have to be considered in the decision of fertilizer nee