13.2 Urea lepas lambat dengan penyalutan poliakrilamida, poliakrilat, dan parafin

23 DAFTAR PUSTAKA Abraham J. 1997. Controlled Release Fertilizer Formulation Based on Polymers. [tesis]. Kottayam: Mahatma Gandhi University. Al-Zahrani SM. 2000. Utilization of polyethylene and paraffin waxes as controlled delivery systems for different fertilizers. Ind Eng Chem Res 39:367- 371. Hekmat A, Barati A, Frahani EV, Afraz A. 2009. Synthesis and analysis of swelling and controlled release behaviour of anionics sIPN acrylamide based hydrogel. Eng Technol 56:96-100. Hoeung P, Bindari Y, Senda SP. 2011. Development of granular urea-zeolite slow release fertilizer using inclined pan granulator. Jurnal Teknik Kimia Indonesia 10 2: 102-111. Hua S, Wang A. 2009. Synthesis, characterization and swelling behaviors of sodium alginate-g-polyacrylic acidsodium humate superabsorbent. Carbohydrate Polymers 75: 79-84. Jagadeeswaran R, Murugappan V, Govindaswamy M. 2005. Effect of slow release NPK fertilizer sources on the nutrient use efficiency in turmeric Curcuma longa L.. World Agric Sci 1:65-69. Liang R, Yuan H, Xi G, Zhou Q. 2009. Synthesis of wheat straw-g-polyacrylic acid superabsorbent composites and release of urea from it. Carbohydr Polym 77:181-187. Mahdavinia GR, Mousavi SB, Karimi F, Marandi GB, Garabaghi H. 2009. Synthesis of porous polyacrylamide hydrogels using calcium carbonate and its application for slow release of potassium nitrate. Express Polymer Letters 5: 279-285. Mas’ud ZA, Khoti M, Sari N, Nur A. 20 3. Synthesis of cassava waste pulp- acrylamide super absorbent: effect of initiator and cross-linker concentration. Indo. J. Chem 13 1: 66-71. Moad G dan Solomon DH. 2006. The chemistry of radical polymerization. Ed ke- 2. Amsterdam: Elsevier. Pavia DL, Lampman GM, Kriz GS. 2001. Introduction to spectroscopy. Ed ke-3. USA: Thomson Learning. Savci S. 2012. An agricultural pollutant: chemical fertilizer. International Journal of Environmental Science and Development 3 1: 77-80. Shaviv A. 2005. Controlled Release Fertilizers, IFA International Workshop on Enhanced-Efficiency Fertilizers. Paris: International Fertilizer Industry Assosciation. Subbarao CH, Kartheek G, Sirisha D. 2013. Slow release of potash fertilizer through polymer coating. International Journal of Applied Science and Engineering 11 1: 25-30. Suherman, Anggoro DD. 2011. Producing slow release urea by coating with starchacrylic acid in fluid bed spraying. International Journal of Engineering Technology 116: 77-80. Talaat HA, Sorour MH, Aboulnour AG, Shaalan HF, Ahmed EM, Awad AM, Ahmed MA. 2008. Development of a multi-component fertilizing hydrogel