Asbur Y, Purwaningrum Y (2015). The optimization production of sweet corn by the balanced of organic and inorganic fertilizer. Jurnal Pertanian Tropik 2(3):200-210.

Asmamaw BA (2017). Effect of planting density on growth, yield and yield attributes of rice (Oryza sativa L.). African Journal of Agricultural Research 12(35):2713-2721. 
Crossref

Azizah N, Prasetya B, Kurniawan S (2013). Enriched-Granular Compost (EGC ) from campus organic waste as soil conditioner in intensive rice farming system. Agrivita, 35(2):184-192. 

Bozorgi HR, Faraji A, Danesh RK (2011). Effect of plant density on yield and yield components of rice. World Applied Sciences Journal 12(11):2053-2057.

Ceesay M, Reid WS, Fernandes ECM, Uphoff NT (2006). The effects of repeated soil wetting and drying on lowland rice yield with system of Rice Intensification (SRI) methods The effects of repeated soil wetting and drying on lowland rice yield with syste. International Journal of Agricultural Sustainability 4(1):5-14. 
Crossref

Central Bureau of Statistics (CBS) (2017b). Population density according to province 2000-2015 (in Indonesian). Jakarta: Central Bureau of Statistics.

Central Bureau of Statistics (CBS) (2017c). Consumption average per capita every week of several important food materials 2007-2015 (in Indonesian). Jakarta: Central Bureau of Statistics.

Darmawan M (2016). Analysis of Legowo row planting system and System of Rice Intensification (SRI) of paddy field (Oryza Sativa L.) toward growth and production. Agrotech Journal 1(1):14-18.

Dobermann A, Fairhurst T (2000). Rice: nutrient disorders & nutrient management (1st ed.). Canada, Philippines: Potash & Phosphate Institute (PPI), International Rice Research Institute (IRRI).

Eviati, Sulaeman (2009). Technical guiding of chemical soil analysis, plant, water dan fertilizer (in Indonesian). (B. H. Prasetyo, D. Santoso, & L. Retno, Eds.) (2nd ed.). Bogor: Indonesian Soil Research Institute.

Hwang W, Park S, Kwon T, Yi G, Nam M, Kim S, Park D (2012). Phosphate uptake and growth characteristics of transgenic rice with phosphate transporter 1 (OsPT1 ) gene overexpression under high phosphate soils. African Journal of Agricultural Research, 11(27):6983-6990. 
Crossref

Indonesian Agricultural Ministry Regulation No.40/Permentan/OT.140/04/2007. (2007). Fertilizer recommendation of N, P, and K on paddy field based on specific location (in Indonesian). Jakarta: Indonesian Agricultural Ministry.

Jeon WT (2012). Effects of nitrogen levels on growth, yield and nitrogen uptake of fiber-rich cultivar, Goami 2. African Journal of Biotechnology 11(1):131-137.
Crossref

Kasim S, Ahmed OH, Majid NMA (2011). Effectiveness of liquid organic-nitrogen fertilizer in enhancing nutrients uptake and use efficiency in corn. African Journal of Agricultural Research 10(12):2274-2281. 

Lin X, Zhu D, Chen H, Zhang Y (2009). Effects of plant density and nitrogen application rate on grain yield and nitrogen uptake of super hybrid rice. Rice Science 16(2):138-142. 
Crossref

Marlina N, Gofar N, Subakti AHPK, Rahim AM (2014). Improvement of rice growth and productivity through balance application of inorganic fertilizer and biofertilizer in inceptisol soil of lowland swamp area. Agrivita, 36(1):48–56. 

Matsumoto S, Tsuboi T, Asea G, Miyamoto K, Maruyama A, Takagaki M, Kikuchi M (2017). Effects of plant density on the performance of selected African upland rice varieties. African Journal of Agricultural Research 12(26): 2262-2272. 
Crossref

Ming L, Ekschmitt K, Bin Z, Holzhauer SIJ, Zhong-pei L, Tao-lin Z, Rauch S (2011). Effect of intensive inorganic fertilizer application on microbial properties in a paddy soil of subtropical china. Agricultural Sciences in China, 10(11):1758-1764. 
Crossref

Myint AK, Yamakawa,T, Kajihara Y, Zenmyo T (2010). Application of different organic and mineral fertilizers on the growth, yield and nutrient accumulation of rice in a japanese ordinary paddy field. Science World Journal 5(2):47-54.
Crossref

Pan G, Zhou P, Li Z, Smith P, Li L, Qiu D, Chen X (2009). Combined inorganic / organic fertilization enhances N efficiency and increases rice productivity through organic carbon accumulation in a rice paddy from the Tai Lake region , China. Agriculture Ecosystems and Environment 131:274-280.
Crossref

Qibtiyah M, Amiroh A (2015). The study of straw organics products and jajarlegowo utilization toward rice production increase (Oryza sativa L.). IOSR Journal of Agriculture and Veterinary Science Ver. I, 8(11):31-38. 

Santosa M, Suryanto A (2015). The growth and yield of paddy Ciherang planted in dry and wet season and fertillized with organic and inorganic fertilizers. Agrivita 37(1):24-29. 
Crossref

Sohel MAT, Siddique M, Asaduzzaman M, Alam M, Karim M (2009). Varietal performance of transplant aman rice under differnt hill densities Bangladesh Journal of Agricultural Research 34(1): 33-39.

Sudarsono WA, Melati M, Aziz SA (2014). Growth and yield of organic rice with cow manure application. Agrivita, 36(1):19-25.
Crossref

Sultana J, Siddique M, Abdullah M (2015). Fertilizer recommendation for griculture: practice , practicalities and adaptation in Bangladesh and Netherlands. International Journal of Business, Management and Social Research 1(1):21-40.

Supriyadi S, Purwanto P, Sarijan A, Mekiuw Y, Ustiatik R, Prahesti RR (2017). The assessment of soil quality at paddy fields in Merauke, Indonesia . Bulgarian Journal of Agricultural Science 23(3):443-448.

Supriyadi S, Sudaryanto R, Winarno J, Hartati S, Jamil IS (2014). The quantitative soil quality assessment for tobacco plant in Sindoro mountainous zone. Journal of Degraded and Mining Lands Management 1(3):105-110.
Crossref

Tang L, Zhu Y, Hannaway D, Meng Y, Liu L, Chen L, Cao W (2009). Rice grow: a rice growth and productivity model. Wageningen Journal of Life Sciences, 57:83-92. 
Crossref

Wibowo S, Suhartatik E, Pratiwi GR, Abdullah B, Jamil A, Mejaya MJ, Widowati LR (2015). The guide book of Hazton cultivation technology on rice crops (in Indonesian). Jakarta: Indonesian Agency for Agricultural Research and Development.

Widyastuti Y, Satoto, Rumanti IA (2015). Performance of promising hybrid rice in two different elevations. Agrivita 37(2):169-177. 
Crossref

Zhang A, He L, Zhao H, Wu Z, Guo Z, Li S (2009). Effect of organic acids on inorganic phosphorus transformation in soil with different phosphorus sources. Chinese Journal of Applied and Environmental Biology 15(4): 474-478.