Studies on the combination of organic mulch and earthworms density on the properties of Dystrudepts and oil palm production are scarce. This study aims to determine the effect of organic mulch, earthworm density and it’s interactions and determine the combination of organic mulch and earthworm density which results in improved Dystrudepts properties and the best oil palm production. This rese…
This research was conducted to determine the adaptation of several soybean genotypes planted in two shade conditions according to the age of the oil palm plantations. This study was conducted by using a split plot design with 3 replications. Three levels of shading including shading caused by 3 years old oil palm tree, 5 years old oil palm tree and control were assigned as the main plots. Eight…
Potassium losses through leaching on peat soils are very high. Research on the effect of lime and NPK slow release on potassium loss is still limited. This study aimed to determine the effect of dolomite, a type of NPK slow release and the interaction between the dolomite with NPK slow release of the rate of loss of nutrients in the peat soil and to find the dose that can reduce the rate of lea…
The objective of this research was to determine phenotypic variability of mungbean M2 and M3 Mutant populations resulted from gamma ray irradiation compared to the parent (M0), and see the correlation between characters in the population. The Field experiment was conducted by using a completely randomized design in which three populations including M2, M3 and the parent (M0) were planted in 201…
This study aimed to get to know the effect of different doses formulated Trichokompos doses on the growth and production of onion varieties dilahan peat, as well as to get a dose of Trichokompos formulated and the best interaction on several onion varieties. Research using split plot design draft with 12 combination and each treatment was repeated 3 times, analyzed in the laboratory and analysi…
This research aimed to study the effect of charcoal from oil palm trunks on soil chemical, growth and production of sweet corn, to study the effect of application N, P, K fertilizers on growth and production of sweet corn and interaction of charcoal from oil palm trunks and application N, P, K fertilizers on growth and production of sweet corn. The experiment was arranged in a factorial trial…
The utilization of peat soil for the development of rice cultivation is faced with many obstacles, where the peat soil is ripe often found rice plants with a high percentage of empty grain, empty grain is caused by the lack of elements of Cu. One of the abundant ameliorants that can be utilized as a soil enhancer is the compost of solid waste from sago processing. Utilization of solid waste com…
This study proposed to determine the relationship between the morphological and physiological character during the development of oil palm fruit (Elaeis guineensis Jacq) with yield components and harvest time. The results obtained are useful for determining the pattern of oil palm fruit development, the composition of fat at various levels of fruit development and for looking for suitable fruit…
The objective of the research was to analyze the variability of agronomic and seed quality components related to K fertilizer in soybean mixed populations and to analyze whether K fertilizer affected the quality of soybean seed. This study used a randomized block design with three repetitions. The main factor is the genotype consists of G1= Detam 1, G2 = Detam 2, G3 = Detam 3, G4 = Anjasmoro, G…
Corn consumption increases every year which means the production must be increased. One of effort that can be done is extensification on peatsoil. Peat soil has considerable potential but has low fertility. Dolomite is often used to overcome the low fertility of peat soil, but also increases the solubility of organic compounds. Other ameliorants that containing polyvalent cations are available …
Peatland is one type of lands that is included in the marginal land criteria. . Developing food crop commodities is one of the alternatives for the peatland agriculture development, especially for rice plants with a rooting criterion of 40-50 cm. To improve the nutrients and peat productivity, the additions of macro nutrients like N, P, and K, rice straw organic matter, compost, and cellulolyti…
This study aims to determine the impact of the application of P fertilizer which is very intensive in the first planting cycle of oil palm to the accumulation of various forms of P fractions in the soil (total P, P available, P organic, inorganic P, Ca-P, Al-P, Fe -P and P covered / occluded) as well as Phosphate nutrient uptake in the second oil palm planting cycle. In the first planting c…
Oil palm plantation development in recent year has undergone limitation of suitable land for cultivation, so to increase the production both for seed supply and for oil production in the future are emphasized on land intensification and resource use efficiency. In order to obtain high quality seed of oil palm, identification of suitable female parent which is able to produce greater number of v…
This study was aimed to determine the genetic diversity of populations of Kulim commonly grown in Riau Province by RAPD markers. The analysis was carried out at Laboratory of Molecular Genetics, Center of Research and Development of Biotechnology and Tree Improvement of Forest Plants in Purwobinangun, Sleman, Yogyakarta. Cambium from 36 trees were sampled from 3 populations, i.e. from Bengkalis…
This study aimed was to isolate non symbiotic N fixation bacteria from oil palm plantations fertilized with empty fruit bunch (EFB) and palm oil mill effluent (POME) and to analyze their potency. The soil samples were sampled from private oil palm plantations in Pelalawan, Riau. The soil samples were taken by purposive sampling method from 4 different treatments ie mixed application (EFB + POME…
The objectives of this research were to obtain intensity data fire caterpillar pests Setora nitens and population abundance of Eocanthecona furcellata predators in oil palm plantations in Riau Province, obtain biological data Eocanthecona furcellata from Riau with alternative feed larvae of weaver ants (kroto) and get a rate of predation and power predation Eocanthecona furcellata predator from…
The aim of this study is to obtain suitable, effective and efficiento of isolate Rhizobium bacteria in increasing A. crassicarpa growth in nursery and to know the species of symbiotic nitrogen-fixing bacteria that associated with A. crassicarpa plant. The symbiotic nitrogen-fixing bacteria isolated from root nodules of A. crassicarpa that collected from several trees were planted in several pea…
The aim of this inquiry is to examine the issue of drought stress and dosage of K fertilizer and its interaction towards physiology, development and yield of sweet corn and whether K fertilizer can overcome drought stress on sweet corn. This research was conducted in the greenhouse, Department of Agrotechnology, Faculty of Agriculture, Riau University from September to November 2017. The experi…
Oryctes rhinoceros is one of the main pests in oil palm. These pest can reduce production until 69%, even causing 25% of young plants to die. Control efforts conducted by smallholders or large companies generally use synthetic insecticides. To reduce the effects of synthetic insecticides, one of the alternatives that can be used in the technique of pest control O. rhinoceros is by the used of n…
This research was conducted in three places, Hama Tumbuhan laboratory,(Technical Implementation Unit) Experimental Garden Faculty of Agriculture, University of Riau and in field. This study aims to obtain the predation rate and predator power of Sycanus croceovittatus from Riau in controlling the caterpillar pests of Setora nitens in oil palm crops. The study was prepared in the form of a …