The research purpose to investigate effect of mychorriza and phosphor dosage on growth and yield of soybean. The research was conducted in field experimental of Agriculture and Animal Science Faculty of State Islamic Univesity of Sultan Syarif Kasim Riau started from April to July, 2015. The planting media was peat soil with a pH of 4,79 and seeds used black soybean Mallika Varieties .The research was used Randomized Block Design with two factorials and four replications, the first factor was the dosage phosphor e.g. 0, 75, 150 kg/ha whereas the second factor was mychorriza consisted of 0, 20, 40, 60 g/polybag. The following parameter were observed e.g plant heigh, persentase mycorrhiza infection, number and weight of root nodules, number of pods/plant, number of seed/plant, weight dry seed/plant, weight dry plant, weight dry root, time of flowering and age of harvest time. The result showed that mychorriza application did not increased phsophor efficiency on soybean yield. Without mychorriza and phosphor 150 kg/ha increased shott-root ration at 80 days after planting.
This research had been conducted from December to March 2015 at Horticultural Seed Center, Marpoyan, Pekanbaru. The study aimed to determine the effect of the type of rootstock and the storage period of buds as well as the interaction between both of them towards its growth. This study was conducted experimentally by using completely randomized factorial design (CRFD) consisting of two factors and seven replications. The first factor was type of rootstock (B1: Japanese Citroen, B2: Rough Lemon) and the second factor was storage period of buds (M0: directly grafted, M1: 1-day storage period, M2: 2-day storage period, M3: 3-day storage period). Parameters measured were growth percentage of buds, bud burst time, length of buds, number of leaves and diameter of buds. The results showed that the Rough Lemon rootstock had a significant effect on the number of leaves, length of buds, bud burst time, diameter of buds and equally effect on the growth percentage of buds. Storage period of the buds did not significantly affect the growth of the grafted Siam Madu citrus seedlings.. The interaction between the type of rootstock and the storage period of buds only occurred in the bud burst time only.
Land changes become oil palm plantations accused of contributing greenhouse gas emissions (GHG) included in the mineral soil, therefore it is very important to gather information in mineral soil CO2 emissions to support mitigation and adaption to climate change. This purpose of this research determine the CO2 emissions in the oil palm plantations planted crops in the vegetative stage and generative phase, as well as to determine the ratio of CO2 emissions in the oil palm plantations planted crops in the vegetative stage and generative phase. This research was conducted in November 2015 to February 2016 in Subdistrict of Tambang, District of Kampar, Province Riau. The method used in this research was Random Block Design with four treatments and replications. The treatments were oil palm-bera, oil palm-corn, oil palm-soy bean, oil palm-intercropping corn soy bean. The research showed that CO2 emissions in the oil palm plantation intercropped with crops (corn and soybeans) in the vegetative phase showed no significantly different. Comparison large of CO2 emissions indicated oil palm-corn vegetative phase.
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