The study aimed to determine the effect of NPK Mutiara fertilizer and liquid Nasa organic fertilizer as well as each of the main factors on the growth and yield of melon plants (Cucumis melo L). The experimental design used was factorial 4 x 4 in Completely Randomized Design (CRD). The first factor was the administration of NPK Mutiara fertilizer consisting of 4 levels, namely: 0, 5, 10, and 15 grams/plant, and the second factor Nasa liquid organic fertilizer consisted of 4 levels, namely: 0, 3, 6, and 9 cc/plant. so that 16 combinations of treatments were obtained. Each combination of treatments consisted of 3 replications so that 48 units of the plot were obtained. Data from the observations were analyzed statistically (variance analysis) and BNJ advanced tests at the level of 5%. The parameters observed were flowering age, harvest age, stem diameter, fruit weight per fruit, the thickness of fruit flesh, and taste test. Research shows that the interaction of NPK Mutiara fertilizer and Nasa liquid organic fertilizer does not significantly affect all parameters, but singly NPK Mutiara fertilizer and liquid Nasa organic fertilizer give an influence on the parameters of observation. The main influence of NPK Mutiara fertilizer influences all observation parameters, namely flowering age, harvest age, stem diameter, widest leaf area, fruit circumference, fruit weight per fruit, production per plot, and thickness of fruit flesh. The best treatment is the administration of Pearl 5K NPK/plant (K1). While the main factors for the provision of liquid organic fertilizer Nasa affect the parameters of flowering age, harvest age, and widest leaf area. The best treatment is the administration of 6 ml/l water (N2) liquid organic fertilizer.

This unlicensed gold mining activity (PETI) can have a positive impact on the economy of the community, in the form of increased incomes so that it can improve the welfare of the community. However, besides having a positive impact, PETI's activities will harm the environment around the mining area. The negative impact caused by mining activities is environmental damage in the form of a decrease in land quality as indicated by a decrease in physical, chemical and biological soil quality. The purpose of this study was to determine the nutrient content and the total of microbes in former PETI soils in sub-districts of the Kuantan Singingi Regency. The parameters observed were analysis of nutrient content consisting of analysis of sand, dust, clay, soil pH, C-organic, N-total, P2O5, K2O, interchangeable cations, CEC, a saturation of bases, Aluminum Saturation, and analysis of total soil microbes. The results showed that the Singingi sub-district, Central Kuantan sub-district, Sentoja sub-district, and Logas Tanah Darat sub-district has the texture of sand soil clay to sand, the content of pH H2O Land classified as fertility is very sour, C-Organic (%), Ca-dd, Nitrogen-Total (%), Mg-dd and CEC with very low fertility criteria, C/N Ratio with low to very low fertility criteria, K-dd content with low criteria, Na-dd with moderate to very high criteria, aluminum saturation is very high with wet saturation the fertility criteria are low. The total microbes in the Sub-district of Sentoja Raya and Logas Tanah Darat Sub-district are much higher than Singingi Sub-district and Central Kuantan Sub-district.

ABSTRACT   This research was carried out at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Pekanbaru, from April to July 2019.  The purpose of this study was to determine the effect of the interaction and main fertilizer of Petroganik and Grand K on the growth and production of peanut plants. The method used was a Completely Randomized Design which consisted of two factors. The first factor was P (Petroganik) and the second factor was K (Grand-K), each of which consisted of 4 levels of treatment so that there were 16 treatment combinations. Each treatment consisted of 3 replications, so there were 48 experimental plots, consisting of 12 plants and 3 plants as observational samples with the total number was 576 plants. Data from the latest observations were analyzed by variance (ANOVA) and further tested with the significant difference in honesty (BNJ) at the 5% significant level. The results showed the interaction of Petroganik and Grand-K fertilizers significantly affected plant height, relative growth rate and weight of 100 seeds. The best combination of treatment in the application of Petroganic fertilizer was 81 g/plot and Grand K fertilizer was 14 g/plot (P3K2). The main effect of real Petroganik fertilizer on all parameters of observation with the best treatment was the application of Petroganic fertilizer as much as 81 g/plot (P3). The main effect of Grand K fertilizer was significant on all parameters observed with the best treatment was the application of Grand K fertilizer of 14 g/plot (K2).

The study aimed to determine the effect of giving NPK Grower fertilizer and defoliation to seed development and corn crop production. The design used in this study was a Factorial Completely Randomized Design consisting of two factors. The first factor is NPK Grower (N) fertilizer with a dose of 0, 7.5, 15, 22.5g / plant while the second factor is Defoliation (D) with some 0, 2, 4, all leaves under the cob. The parameters observed were changes in seed dry weight (g), changes in seed moisture content (%), speed of accumulation of dry matter (mg / seeds / day), effective filling time (days), harvest age (days), and dry shelled weight ( g). The last observation data were analyzed statistically and continued with a BNJ follow-up test at the level of 5%. The results showed that interactively giving NPK Grower and Defoliation fertilizer had a significant effect on changes in seed dry weight, changes in seed moisture content, speed of dry matter accumulation, harvest age and dry shell weight. The best treatment is in the combination of 22.5g / plant NPK Grower fertilizer treatment and Defoliation of all leaves under the cob (N3D3). The main effect of NPK Grower fertilizer has a significant effect on all parameters. The best treatment for NPK Grower fertilizer is 22.5g / plant (N3). The main effect of Defoliation has a significant effect on all parameters. Best treatment Defoliate all leaves under the cob (D3).

The purpose of this research is to know the influence of compost TKKS and NPK 16:16:16 on the breeding of oil palm (Elaeis guineensis Jacq.) in Main Breeding with Sub Soil Ultisol Media. This research has been conducted in the field of Agriculture Faculty of the Islamic University of Riau. for 4 months, starting from April to August 2017. The design used in this research is Factorial Random Design (RAL) consisting of two factors, the first factor is Giving of empty palm fruit bunch compost (Factor K) consisting of 4 levels ie not giving empty bunches of palm oil (K0), giving compost of oil palm empty bunch 90 gr/plant (K1), 180 gr/plant (K2) and 270 gr/plant (K3), and NPK 16:16:16 Fertilizer (Factor P) consisting of 4 levels ie not giving fertilizer (P0), NPK 16:16:16 15 g/plant (P1), 30 gr/plant (P2), 45 gr/plant (P3) and 60 gr/plant (P4). The parameters observed in this study were the increase of plant height (cm), the increase of the number of stem (strands), the length of the longest stem length (cm), the increase of girth (cm), the number of root root (root) and root length (cm). The result of the research showed that the interaction of TKKS compost and NPK 16:16:16 fertilizer gave a significant effect on the plant height increase, the increase of midrib, the length of the longest bark and the increase of girth. Combination of best treatment on compost TKKS 270 g/plant and NPK 16:16:16 60 g/plant (K3P4) fertilizer. The main effect of TKKS compost and NPK 16:16:16 fertilizer gave a significant effect on all parameters in the range of plant height, the increase of midrib, the length of the longest stem, the increase of girth, the number of root roots and the longest root length. With the best treatment is the compost TKKS 270 g/plant (P3) and fertilizer NPK 16:16:16 60 g/plant (P4).