Query: soybean NPK

title: The decomposition and efficiency of NPK enriched biochar addition on Ultisols with soybean
abstract: This research aims to compare fresh biochar and NPK enriched biochar and their decomposition levels and nutrient absorption efficiency in acid soil with soybean. Factorial randomized block design was used in this experiment and consisted of two factors. The first factor, biochar source, comprised four levels: B0: biochar without NPK, B1: rice straw biochar NPK, B2: soybean straw biochar NPK, and B3: wood biochar NPK. The second factor, biochar enrichment, comprised four levels: D1: 0.5 tons ha 1 D2: 2.5 tons ha 1 D3: 5.0 tons ha 1 and D4: 10 tons ha 1 Each treatment was replicated three times, yielding 48 experiment units. The results showed that biochar enrichment with NPK affected the decomposition level. The percentage of increasing decomposition in enriched wood biochar (0.09% was lower than rice (0.28% and soybean (0.53% straw biochar. An increase in NPK absorbance efficiency and soybean dry weight was evident in NPK enriched biochar. The highest N absorbance efficiency occurred in wood biochar (21% followed by soybean and rice straw biochar, respectively, while the highest P and K absorbances were found in rice straw biochar (35% and 26% respectively) followed by wood and then soybean biochar.

title: Growth and Yield of Soybean as a Response of the Fertilization of NPK Compound Produced with Spent and Deoiled Bleaching Earth Filler
abstract: Spent Bleaching Earth (SBE) is a by product of the refining of Crude Palm Oil (CPO) into cooking oil which is classified as hazardous and toxic materials waste. SBE has the potential to be used as a filler in the production of NPK fertilizer. This study aims to compare the effect of SBE and Deoiled Bleaching Earth (DBE) as the replacement of clay mineral, which is expected to have the same effect as the control treatment in terms of the leaf area, total dry weight, plant height and yield of plant. This experiment used a one factor Randomized Complete Block Design (RCBD) with three replicates. The treatments of filler in NPK fertilizer were 10% clay minerals, NPK with 5% clay mineral 5% SBE filler and NPK with 5% clay mineral 5% DBE filler. Fertilizer was given twice, ie when the plant was 14 days after planting (DAP) as much as 2 g polybag 1 and age 35 DAP as much as 3 g polybag 1 at each treatment. The results showed that the application of NPK fertilization with 5% clay mineral 5% SBE filler and NPK fertilization with 5% clay mineral 5% DBE filler had the same effect as NPK fertilization with 10% clay mineral filler on leaf area, total dry weight, plant height and yield of plant. SBE and DBE can be used as subtituties for clay mineral in NPK fertilizer production.

title: Growth and Yield Responses of Four Soybean (Glycine max (l. Merrill. Cultivars to Different Methods of NPK Fertilizer Application
abstract: This study aimed to determine the growth and yield responses of four soybean cultivars to different methods of N, P, and K fertilizers application. The methods consisted of one time application (at the planting time) and split application (at the planting time and during the initial stage of pod formation (R3 stage) Four superiors soybean cultivars were used, namely Anjasmoro, Grobogan, Dena 1, and Argomulyo. One time fertilizers application resulted in an increased plant height compared to split fertilizers application. In contrast, the split fertilizers application led to a higher yield of soybeans indicated by the higher total number of pods, number of filled pods, 100 grain weight, and seed dry weight. Cv. Anjasmoro produced higher growth and yield than cv. Grobogan, Dena 1, and Argomulyo. It also produced the highest yield compared to other cultivars. Meanwhile, cv. Argomulyo produced the lowest yield in both fertilization methods. Based on the soil analysis after harvest, the nutrient content of K in the soil was higher than before planting in both fertilization methods. In addition, the split fertilizers application led to higher utilization of P in the soil after harvest.

title: Effect of NPK Nano fertilizers and Compost on Soil Fertility and Root Rot Severity of Soybean Plants Caused by Rhizoctonia solani

title: Increasing corn and soybean yields by arranging the plant spacing and NPK fertilizer dosages in intercropping system
abstract: Corn and soybean are food crops which are ranked on the second and third position as the main crops with the highest yield in Indonesia. Based on data of 2012, corn and soybean harvested areas amounted 3,956 ha and 597.65 ha with the productivity of 48.99 tons/ha and 843.15 tons/ha, these areas increased up to 4,388 ha (corn) and 589.42 ha (soybeans) which lead an increase in corn and soybean production by 52.85 tons/ha and 887.54 tons/ha. However, increasing crop productivity, especially for corn and soybeans, cannot continuously use land expansion because the land area of Indonesia that is suitable for agriculture is only 94.07 million ha from 188.20 million of total land area. Thus, the solution to overcome this issue is by arranging the plant spacing and providing proper nutrients. Plant spacing in intercropping systems can minimize competition between plants to provide a wellgrown of both plants. This research aimed to determine the increase in productivity of corn and soybean plants using intercropping systems through a combination of plant spacing and a combination of NPK fertilizer dosages. This study used a factorial experimental method that planted crops on the land with 2 factors with split plot design of 4 x 3 factorial and 3 replications. The first factor is the combination of plant spacing with 4 levels, they were plant spacing of corn; 50 cm x 40 cm (J1) 75 cm x 40 cm (J2) 100 cm x 40 cm (J3) 125 cm x 40 cm (J4) and plant spacing of soybean; 40 cm x 20 cm. The second factor is 3 levels of NPK fertilizer dosages combination, they were 0% NPK fertilizer dose of the recommendation (0 g/m2) (D1) 50% NPK fertilizer dose of the recommendation (198.5 g/m2) (D2) 100% of NPK fertilizer dose of the recommendation (397 g/m2) (D3) with 3 replications. DMRT test (Duncan, Multiple Range Test) was performed with a confidence level of 95% when the results between treatments were significantly different.

title: PHYSICO CHEMICAL PARAMETERS OF ORGANIC MANURE, SOIL AND IMPACT OF ORGANIC MANURE AND NPK FERTILIZER ON SEED GERMINATION OF SOYBEAN AND WHEAT
abstract: In order to investigate the comparative analysis of physico chemical parameters of experimental soil (black cotton soil) vermicompost, farmyard manure and their impact on seed germination, the study was conducted by using Randomized block design (RBD) with three replications at the Department of Botany Govt. Madhav Science P.G. College Ujjain, M.P. The various physico chemical parameters (pH, electric conductivity, organic carbon, nitrogen, phosphorus, potassium, zinc, copper, iron, and manganese) and seed germination of soybean and wheat were studied in the experiment. The results revealed that pH (7.14) electric conductivity (1.84 ds/m) organic carbon (198.53 g/kg) nitrogen (246.57 kg/ha) phosphorus (55.24 kg/ha) potassium (438.52 kg/ha) zinc (320.13 ppm) copper (289.34 ppm) iron (239.34 ppm) and manganese (248.37 ppm) were found more efficient in vermicompost followed by farmyard manure and soil. The results also revealed that seed germination percentage of soybean was found highest (91% by using 20% vermicompost followed by 20% farmyard manure (86% 200 gm NPK (73% treatment, control (69% and seed germination in wheat was maximum (93% in 20% vermicompost treatment followed by 20% farmyard manure (87% 200 gm NPK (74% and minimum (70% in control. The study concluded that vermicompost is nutrient rich and most efficient organic manure than farmyard manure and NPK fertilizer for the better growth and sustainable agriculture of soybean.

title: SOIL CHEMISTRY CHARACTERISTIC IN CORN, PEANUT, AND SOYBEAN AFTER APPLICATION OF MULCH CORN AND NPK FERTILIZER AT ULTISOL ACEH BESAR (INDONESIA)

title: Optimizing surface soil NPK balance through integrated nutrient management in wheat soybean cropping system from Rawalakot Pakistan
abstract: The efficient use of organic inorganic amendments and changing cropping pattern are important management strategies to improve crop productivity as well as restore the nutrient buildup of degraded soils. A three year (2008 09 to 2010 11) soybean wheat rotation field experiment was conducted at Rawalakot, Azad Jammu and Kashmir.  UN50+PM50, UN50+WSR50, UN50+PM25+WSR25 and a control (unfertilized) Applications of amendments were made on N equivalent basis at the rate of 100 kg N ha. Data on surface NPK balance showed a net depletion of 41.2 kg N hayear and gain of 95.8 and 16.5 kg hayear of phosphorus (P) and potassium (K) for the control soil during three years. Soil amended with either organic amendments (PM and WSR) and UN alone or combination of both organic amendments UN yielded positive surface N and P balance that varied between 40.7 86.8 and 84.5 213.7 kg hayear, respectively under different amendments. The UN100 and UN50+PM50 treatments showed a K deficit of 12 and17.1 kg hayear, respectively while UN50+WSR50 and UN50+PM25+WSR25 treatments marginally increased soil K content between 1.3 5.2 kg hayearcompared to 16.5 kg hayear in the control treatment. Treatments receiving repeated applications of poultry manure alone or with UN has the potential to improve the surface N and P balances. Therefore, it is recommended to increase annual addition of K fertilizer (beyond 50 kg K2O hayear) with organicinorganic amendments to maintain K balance and sustain long term soybean wheat productivity of degraded soils of Himalayan Hindukush of Azad Jammu and Kashmir.

title: Transformation of NPK nutrients in soil as influenced by different fertilizer recommendation approaches to soybean [Glycine max. (L) crop in a Vertisol
abstract: The field experiments were conducted at the Main Agricultural Research Station, Dharwad during kharif season of the year 2015 and 2016 to study the effect of different fertilizer recommendation approaches to soybean on NPK transformation in soil. The treatments consisted of different fertilizer recommendation approaches viz. site specific nutrient management (SSNM) and soil test crop response (STCR) each targeted yield at 20, 25. 30 and 35 q ha and soil test laboratory (STL) approach and these were compared with graded levels of fertilizer (125 and 150 of RDF) and control (RDF) The experiment laid out in randomized completely block design with twelve treatments replicated thrice. Pooled data of two years indicated that inorganic forms of nitrogen, phosphorus and potassium significantly influenced due to different fertilizer recommendation approaches. In most of the soils, more than 90 per cent of nitrogen is mainly organic in nature and only a small portion is in inorganic form. Inorganic forms (mineralizable N) of nitrogen are ammonium (NH4) and nitrate (NO3) and plants normally utilize nitrogen in only nitrate and ammonical forms. Different inorganic forms of nitrogen viz. NH4 N and NO3 N and mineral N and total N contents in soil was recorded significantly higher in the treatment with target yield 35 q ha under SSNM which was on par with 30 q ha under the same management practice and both the treatments differed significantly to the remaining treatments. All the inorganic forms of phosphorus such as saloid P, Al P, Fe P, Ca P, occluded P and reductant P were recorded significantly higher in the treatment received 150 per cent RDF and were at par with the treatment 125 per cent RDF and SSNM yield target at 35 q habut differed significantly to other treatments. Soil potassium exists in dynamic equilibrium in four different forms viz. water soluble K, exchangeable K (exch K) non exchangeable K (non exch K) and lattice K and all these forms are recorded higher in yield target at 30 and 35 q ha under SSNM compared to other remaining approaches.

title: ANALYSIS OF GROWTH AND PRODUCTION OF SOYBEAN (Glycine max (L) Merril) BY APPLICATION OF NPK COMPOST AND PALM OIL EMPTY FLOW PLANTS
abstract: The research was carried out in Sei Kepayang Kanan Village, Sei Kepayang Subdistrict, Asahan Regency, North Sumatra Province with a height of 7 m above sea level with a flat topography. The study was conducted in March 2018 to May 2018. This research was conducted using a factorial randomized block design with 2 treatment factors and 3 replications. The first factor is empty Palm Oil Compost fertilizer with 4 levels, namely: TK0 0 kg plot (control) TK1 1 kg plot, TK2 2 kg plot and TK3 3 kg plot. The second factor is NPK administration with 3 levels namely N0 No pruning, N1 0.015 g plot and N2 0.03 g plot. From the results of observations of NPK applications showed no significant effect on plant height aged 2, 4 and 6 MST, but had a significant effect on the number of branches per sample plant, number of filled pods per sample plant and production per plot. The NPK (N2) treatment showed the best effect on producing plant height (41.97 cm) number of branches per sample plant (1.52 branches) number of filled pods per sample plant (159.97 g) and production per plot 7.31 kg) The treatment of Palm Oil Empty Fruit Bunch Compost did not show any significant effect on plant height at ages 2, 4 and 6 MST, and also had a significant effect on the number of branches per sample plant, number of filled pods per sample plant and production per plot.  Palm Oil Empty Fruit Bunch Compost Fertilizer, Glycine Max. (L) Meril.