82
DAFTAR PUSTAKA
Agung, T. 2004. Analisis Efisiensi Serapan N, Pertumbuhan, dan Hasil Beberapa Kultivar Kedelai Unggul Baru dengan Cekaman Kekeringan dan Pemberian Pupuk Hayati. Agrosains. 6(2): 70–74.
Akram, H. M., Ali, A., Sattar, A., Rehman, H. S. U., & Bibi, A. 2013. Impact Of Water Deficit Stress On Various Physiological And Agronomic Traits Of Three Basmati Rice (Oryza sativa L.) Cultivars. Journal of Animal and Plant Sciences, 23(5), 1415–1423.
Ali, M., Bakht, J., & Khan, G.D. 2014. Effect Of Water Defi Ciency And Potassium Application On Plant Growth, Osmolytes And Grain Yield Of Brassica Napus Cultivars. Acta Bot. Croat. 73 (2), 299–314.
Anonim. 2017. Jenis dan Faktor Bencana Kekeringan.
https://www.gurugeografi.id/2017/12/jenis-dan-faktor-bencana- kekeringan.html (diakses 28 Juli 2018).
Arabi, M. 2004. Uji ketahanan Beberapa Varietas Kedelai Terhadap Kekeringan pada Berbagai Konsentrai Polyethile Gligol (PEG). http:// elib.pdii.lipi.go.id/.
(diakses 29 Juli 2018).
Arrohmah. 2007. Studi Karakteristik Klorofil Pada Daun Sebagai Material Photodector Arganic. Skripsi. Universitas Sebelas Maret: 8-9.
Ashraf, M., & Fooland, M. R. 2007. Roles Of Glycine Betaine And Proline In Improving Plant Abiotic Stress Resistance. Environmental and Experimental Botany, 59(2): 206–216.
Aslam, M., Zamir, M. S. I., Afzl, I., Yaseen, M., Mubeen., & M. Shoib. 2013. Drought Stress, Its Effect On Maize Production And Development Of Drought Tolerance Through Potassium Application. Cercetări Agronomice În Moldova. 46 (2) : 99-114.
Aslam,M., M.S.I. Zamir., I. Afzal, and M. Amin. 2014. Role of potassium in physiology function of spring maize grown under drought stress. The Journal of Animal & Plant Sciences. 24(5): 1425-1465.
Azzamy. 2015. Unsur Hara Kalium dan Fungsinya. https://mitalom.com/unsur-hara- kalium-dan-fungsinya/ (diakses 28 Juli 2018).
Bakoume, C., Shahbudin, N., Yacob S., Siang, C. S., & Thambi M. N. A. 2013.
Improved Method for Estimating Soil Moisture Deficit in Oil Palm (Elaeis guineensis Jacq.) Areas With Limited Climatic Data. Journal of Agricultural Science 5(8) : 57 – 65.
Bilagi, S. A., D.I. Jirali, M.B. Chetti, S.M. Hiremath, dan B.N. Patil. 2008.
Biophysical, Biochemical Parameters and Their Association with Yield in Dicoccum Wheat Genotypes. J. Agricultural Science 21: 176-180.
Braconnier S, d’Auzac J. 1990. Chloride and stomatal conductance in coconut. Plant Physiol Biochem. 28(1):105–111.
Bray, E.A. (1997). Plant Responses To Water Deficit. Trend Plant Sci., 2(21), 48-54.
Cakmak, I. 2005. The Role Of Potassium In Alleviating Detrimental Effects Of Abiotic Stresses In Plants. J. Plant Nutr. Soil Sci.168: 521–530.
83
Calliman, J.P. Southworth A.. 1998. Effect Of Drought And Haze On The Performance Of Oil Palm. In Proc.Int. Oil Palm. Conf., Bali, September 23- 25, 1998. Medan, Indonesian Oil Palm Research Institute, 1999. p. 250- 274.
Cha-um, S., N. Yamada.,T.Takabe., and C. Kirdmanee. 2011. Mannitol-induced water deficit stress in oil palm (Elaeis guineensis Jacq.) seedlings. J Oil Palm Res. 23:1194-1202.
Cha-um, S., Yamada, N. Takabe, T. & Kirdmanee, C. 2013. Physiological Features And Growth Characters Of Oil Palm (Elaeis guineensis Jacq.) In Response To Reduced Water-Deficit And Rewatering. Australian Journal of Crop Science. 7(3) : 432–439.
Cha-um,S., T.Takabe, and C.Kirdmanee. 2010. Osmotic potential, photosynthetic abilities and growth characters of oil palm (Elaeis guineensis Jacq.) seedlings in responses to polyethylene glycolinduced water deficit. Afr J Biotechnol. 9:6509–6516.
Corley, R. H. V. & H. T. Khong 1982. Irrigation of Oil Palms in Malaysia.In:The Oil Palm in Agriculture in the Eighties E. Pushparajah and C. P. Soon (eds.) Vol. II, pp.343-356. The International Conference on Oil Palm in Agriculture in the Eighties, Incorporated Society of Planters, Kuala Lumpur.
Corley, R.H.V., & Tinker, P.B. 2003. The Oil Palm Fourth Edition. Blackwell Science Ltd. United Kingdom.
Damanik, M. M. B., Hasibuan, B. E., Sarifuddin, Fauzi, Hanum, H., 2010. Kesuburan Tanah. USU-Press, Medan.
Darlan, N.H., Pradiko, I., Winarna, & Siregar, H.H. 2016. Dampak El Nino 2015 Terhadap Performa Tanaman Kelapa Sawit di Sumatera Bagian Tengah dan Selatan. Jurnal Tanah dan Iklim Vol 40(2): 113-120.
Darmosarkoro, W., Harahap, I.Y., & Syamsuddin, E. 2001. Pengaruh Kekeringan Pada Tanaman Kelapa Sawit Dan Upaya Penanggulangannya. Warta PPKS 9 (3) : 83-96.
Dirjen. 2018. Dirjen: Sawit Beri Sumbangan Terbesar.
www.antaranews.com/berita/670541/dirjen-sawit-beri-sumbangan-terbesar.
(diakses 27 Juli 2018).
Dixon, J.B. 1991. Roles of Clays in Soils. Applied Clay Science, (5); 489-503.
Egilla, J.N.; Davies, F.T.; Boutton, T.W. 2005. Drought Stress Influences Leaf Water Content, Photosynthesis, And Water-Use Efficiency Of Hibiscus Rosa- Sinensis At Three Potassium Concentrations. Photosynthetica 4: 135–140.
Farooq, M., A. Wahid, N. Kobayashi, D. Fujita, and S.M.A. Basra. 2009. Plant drought stress : effect, mechanism and management. Agron. Sustain. Dev.
29:185-212
Farooq, M., Basra, S.M.A.,Wahid, A., Cheema, Z.A., M.A. Cheema, & Khaliq, A.
2008. Physiological Role Of Exogenously Applied Glycinebetaine In Improving Drought Tolerance Of Fine Grain Aromatic Rice (Oryza sativa L.). Journal of Agronomy and Crop Science, 194: 325–333.
Fatma, D. 2017. Kekeringan: Pengertian, Penyebab, Dampak, dan Upaya Penanggulangan. https://ilmugeografi.com/bencana-alam/kekeringan (diakses 28 Juli 2018).
84
Fauzi, Y. Widyastuti, Y. E, Wibawa, I. S, Paeru, R. H. 2012. Kelapa Sawit. Jakarta : Penebar Swadaya: 236.
Fauzi, Y., E.W.Yustina., S.Iman, & H. Rudi. 2008. Kelapa Sawit : Budi Daya, Pemanfaatan Hasil dan Limbah, Analisis Usaha dan Pemasaran. Edisi Revisi. Penebar Swadaya, Jakarta.
Ferreira Melo, E., Fernandes-Brum, C. N., de Castro, E. M., & Chalfun-Júnior, A.
2014. Anatomic And Physiological Modifications In Seedlings Of Coffea Arabica Cultivar Siriema Under Drought Conditions. Ciência E Agrotecnologia, 38(1): 25–33.
Ferwerda, J.D. 1977. In Oil Palm: Ecophysiology of Tropical Crops. P. T. Alvim dan T. T. Kozlowski. Academic press, New York: 351-380
Feryono, Armaini, & Yulia, A.E. 2013. Pertumbuhan dan Serapan Kalium Bibit Kelapa Sawit (Elaeis guineensis Jacq.) di Main Nursery Dengan Efek Sisa Pemupukan Pada Beberapa Medium Tumbuh.
Gardner, F.P., Pearce R.B, Mitchell, R. L. diterjemahkan oleh Susilo, H &
Subiyanto., 1991. Fisiologi Tanaman Budidaya. Penerbit Universitas Indonesia Press. Jakarta.
Gomathi, R and P. Rakkiyapan. 2011. Comparative lipid peroxidation, leaf membran thermostability, and antioxidant system in four sugarcane genotypes differing in salt tolerance. International Journal of Plant Physiology and Biochemistry. 3 (4): 67–74.
Hakim, Nyakpa, Lubis, Nugroho, Saul, Diha, Hong, & Bailey. 1986. Dasar-Dasar Ilmu Tanah. Univ Lampung.
Halim. 2012. Optimasi Dosis Nitrogen dan Kalium Pada Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Di Pembibitan Utama. Tesis. IPB, Bogor.
Hamim, Sopandie, D., & Yusuf, M. 1996. Beberapa Karakteristik Morfologi Dan Fisiologi Kedelai Toleran Dan Peka Tcrhadap Cekaman Kekeringan.
Hayati, 3(1): 30–34.
Hanafiah, K.A. 2010. Dasar-Dasar Ilmu Tanah. Rajawali, Press. Jakarta.
Hartley, C. W. S. 1977. The Oil Palm. Longman Group Limited. London : 704.
Humoen, M. I. 2017. Pengaruh Bagian Setek dan Lama Perendaman Ekstrak Daun Kelor terhadap Pertumbuhan Bibit Sirih Daun (Piper betle, L.). Savana cendana 2 (4) : 59-61.
Imogie, A.E., Oviasogie, P.O., Ejedegba, B.O., Udosen, C.V. 2012. Effect Of Potassium (K) Source On Oil Palm Yield At Okomu Oil Palm Plc, Ovia North, L.G.A. Of Edo State. International Journal Of Plant Reserch 2(1): 35- 38.
Intara, Y.S., Sapei, A., Erizal, N. Sembiring & Djoefrie, M.H.B. 2011. Pengaruh Pemberian Bahan Organik Pada Tanah Liat Dan Lempung Berliat Terhadap Kemampuan Mengikat Air. Jurnal Ilmu Pertanian Indonesia.
16(2): 130-135.
Jaleel, C.A., Manivannan,P., Wahid, A., Farooq, M., Somasundaram, R. &
Panneersalvam, R. 2009. Drought Stress In Plants: A Review On Morphological Characteristics And Pigments Composition. International Journal of Agricultural and Biology. 11:100–105.
85
Jumin.H.B. 2002. Agroekologi Suatu Pendekatan Fisiologi. Raja Grafindo Persada.
Jakarta.
Kanan, K., Wongbe, Y., Brahima, C., Boake, K., Alphonse, K., Koffi, B., Diabetes, dan Severin, A. 2016. Impact Of Crop Management And Optimized Potassium Nutrition On The Productivity Of Oil Palm Tree (Elaeis guineensis Jacq.) In Two Localities In Southeastern Of Cote D’ivoire.
ARPN Journal Of Agricultural And Biological Science 11(6).
Kartasapoetra, A. G. 1991. Pengantar Anatomi Tumbuh-Tumbuhan (Tentang Sel &
Jaringan). Rineka Cipta.
Khaerana, Ghulamahdi, M., & Purwakusumah, E. D. 2008. Pengaruh Cekaman Kekeringan Dan Umur Panen Terhadap Pertumbuhan Dan Kandungan Xanthorrhizol Temulawak (Curcuma xanthorrhiza Roxb.). Bul. Agron, 3 (36): 241–247.
Khairullah. 2009. Pengertian Kekeringan dan Langkah-Langkah Mengantisipasinya.
Ustadzklimat.blogspot.com/2009/04/pengertian-kekeringan-dan- langkah.html (diakses 28 Juli 2018).
Kirkham, M.B. 1990. Plant Responses To Water Deficits. In B.A. Stewart and D.R.
(Ed). Irrigation of Agricultural Crops. Madison, Wisconsin USA : 323-342 Kramer.P. J. 1969. Plant Soil Water Relationship. Tata Mcgraw Hill Public. Co. Ltd.
New Delhi.
Kurniasari, A.M., Adisyahputra & R.Rosman. 2010. Pengaruh Kekeringan Pada Tanah Bergaram Nacl Terhadap Pertumbuhan Tanaman Nilam. Buletin Penelitian Tanaman Rempah dan Obat, 21 (1): 18- 27.
Lakitan, B. 1993. Dasar-Dasar Fisiologi Tumbuhan. Raja Grafindo Persada.
Lakitan, B. 2004. Dasar Dasar Fisiologi Tumbuhan. PT Raja Grafindo Persada.
Jakarta : 73–80.
Lakitan, B. 2011. Dasar-Dasar Fisiologi Tumbuhan. Rajagrafindo Persada. Jakarta.
Lestari, E.G. 2006. Hubungan Antara Kerapatan Stomata Dengan Ketahanan Kekeringan Pada Somaklon Pada Gajah Mungkur, Towuti Dan IR 64.
Jurnal Biodiversitas. 7: 44-48.
Levitt, J.1980. Responses Of Plants To Environmental Stresses: Water, Radiation, Salt, And Other Stresses. Vol. II. New York, Academic Press.
Liu, X, & Hou, X. 2018. Antagonistic Regulation Of ABA And GA In Metabolism And Signaling Pathways. Frontiers in Plant Science: 9:251.
Lubis, A. U. 2008. Kelapa Sawit (Elaeis guineensis Jacq.) di Indonesia Edisi 2.
Pusat Penelitian Kelapa Sawit, Medan.
Luis ZG, Bezerra KMG, Scherwinski-Pereira JE. 2010. Adaptability and leaf anatomical features in oil palm seedlings produced by embryo rescue and pre-germinated seeds. Brazilian J Plant Physiology. 22(3):209–215.
Maestri, M., Da Matta, F. M., Regazzi, A. J., & Barros, R. S. 1995. Accumulation Of Proline And Quaternary Ammonium Compounds In Mature Leaves Of Water Stressed Coffee Plants (Coffea Arabica And C. Canephora). Journal of Horticultural Science. 70(2): 229–233.
Mahajan, S., & Tuteja, N. 2010. Cold, Salinity, and Drought Stress. Plant Stress Biology: From Genomics to Systems Biology. 444: 137–159.
86
Manalu, A.F. 2008. Pengaruh Hujan Terhadap Produktivitas dan Pengelolaan Air di Kebun Kelapa Sawit (Elaeis guineensis Jacq.) Mustika Estate, PT. Sajang Heulang, Minamas Plantation, Tanah Bumbu, Kalimantan Selatan. Skripsi.
Fakultas Pertanian, Institut Pertanian Bogor. Bogor.
Mangoensoekarjo S & Semangun, H. 2005. Manajemen Agribisnis Kelapa Sawit.
Gadjah. Mada University Press. Yogyakarta.
Manurung, R., Gunawan, J., Hazriani, R., Suharmoko, J. Pemetaan Status Unsur Hara N, P Dan K Tanah Pada Perkebunan Kelapa Sawit Di Lahan Gambut.
Jurnal Pedon Tropika. 1 (3): 89-96.
Mariay, I.F. 2012. Hubungan aktivitas nitrat reduktase dan kadar klorofil kultivar kedelai tahan kekeringan. Jurnal Agrotek. 3(1).
Marschner P. 2012. Marschner’s Mineral Nutrition of Higher Plants. 3rd ed. London (GB): Academic Press.
Maryani, A. T. 2012. Pengaruh Volume Pemberian Air Terhadap Pertumbuhan Bibit Kelapa Sawit Di Pembibitan Utama. J. Online Agroekoteknologi. 1(2): 6475 Matana, Y.R., dan Mashud, N. 2015. Respons Pemupukan N, P, K, dan Mg
Terhadap Kandungan Unsur Hara Tanah Dan Daun Pada Tanaman Muda Kelapa Sawit. B. Palma Vol. 16 ( 1): 23 – 31.
Meiyannie, A. 2005. Analisis Beberapa Peubah Biokimia Pada Tanaman Kelapa Sawit Yang Berasal Dari Dua Lokasi Berbeda. Skripsi. Program Pendidikan Sarjana, Universitas Pakuan. Bogor: 97.
Men, Y., D. Wang., B. Li., Y. Su, and G. Chen. 2018. Effects Of Drought Stress On The Antioxidant System, Osmolytes And Secondary Metabolites Of Saposhnikovia Divaricata Seedlings. Acta Physiologiae Plantarum.
40:191.
Mengel. K. and. E.A. Kirkby. 1985. Principles of Plants Nutrition. IPI Bern.
Switzerland
Mersono, & Paulus, S. 2005. Pupuk Akar dan Jenis Aplikasi. Penebar Swadaya.
Jakarta.
Muiz, A. 2016. Perubahan Aktivitas Biokimiawi Dan Fisiologis Empat Progeni Kelapa Sawit (Elaeis Guineensis Jacq.) Pada Berbagai Aras Lengas Tanah. Tesis. Program Pascasarjana Fakultas Pertanian Universitas Gadjah Mada Yogyakarta.
Mullet, J.E., Whitsitt, M.S. 1996. Plant Cellular Responses To Water Deficit. Plant Growth Reg. 20 : 119-124.
Naiola, B. P. 2005. Akumulasi Dan Regulasi Osmotik Dalam Sel Tumbuhan Pada Kondisi Stres Air. Berita Biologi, 7(6): 333-340.
Nasir, A. A. 2001. Fisiologi dan Heat Unit Tanaman. Kumpulan Makalah Pelatihan Dosen-Dosen Perguruan Tinggi Indonesia Bagian Timur Dalam Bidang Agroklimatologi. Bogor.
Nilsson, G.E.., Dixson, D. L., Domenici, P. McCormick, M. I., Sørensen, C., Watson, S.A., & Munday, P. L . 2012. Near-Future Carbon Dioxide Levels Alter Fish
87
Behaviour By Interfering With Neurotransmitter Function. Nature Climate Change 2. (3): 201-204
Oukarroum, A., Madidi, S. El, Schansker, G., & Strasser, R. J. 2007. Probing The Responses Of Barley Cultivars (Hordeum vulgare L.) By Chlorophyll A Fluorescence OLKJIP Under Drought Stress And Re-Watering.
Environmental and Experimental Botany. 60 (3): 438–446.
Palupi, E. R., & Dedywiryanto, Y. 2008 Kajian Karakter Ketahanan Terhadap Cekaman Kekeringan Pada Beberapa Genotipe Bibit Kelapa Sawit (Elaeis guineensis Jacq.).Bul.Agron 36 (1):24-32.
Pangaribuan, Y., D. Asmono, & S. Latif. 2001. Pengaruh Cekaman Air Terhadap Karakter Morfologi Beberapa Varietas Tanaman Kelapa Sawit (Elaeis guineensis Jacq.). Jurnal Penelitian Kelapa Sawit 8 (2) : 81-95.
Permanasari, I., Sulistyaningsih, E. 2013. Kajian fisiologis kadar lengas tanah dan konsentrasi Giberelin pada Kedelai (Glycine max L). Jurnal Agroteknologi 4 (1): 31-39.
Poerwowidodo. 1992. Telaah Kesuburan Tanah. Penerbit Angkasa Persada Jl.
Kronolodong No. 37, Cetakan keempat Bandung.
Prawiranata, W., Harran, S., Tjondronegoro, P. 1992. Dasar-Dasar Fisiologi Tumbuhan Jilid I. Jurusan Biologi. FMIPA IPB. Bogor : 341.
Prihutami, N.D. 2011. Analisis Faktor Penentu Produksi Tandan Buah Segar (TBS) Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di Sungai Bahaur Estate (SBHE), PT Bumitama Gunajaya Agro (PT BGA), Wilayah VI Metro Cempaga, Kotawaringin Timur, Kalimantan Tengah. Skripsi. Program Studi Agronomi Fakultas Pertanian. Institut Pertanian Bogor. Bogor.
Putra E.T.S., Issukindarsyah, Taryono and B.H. Purwanto. 2015. Physiological Responses of Oil Palm Seedlings to the Drought Stress Using Boron and Silicon Applications. Journal of Agronomy. 14(2): 49-61
Rad, S. B., & Hajiboland, R. 2017. Effect of Potassium application in drought stressed tobacco (Nicotiana rustica L.) Plants: comparison of root with Foliar application. Ann. Agric. Sci 62 : 121-130.
Rahayu, S. 2008. Kajian Kemampuan PEG 6000 pada tahap Perkecambahan untuk Menduga Ketahanan 2 Varietas Kedelai (Glycine max L) terhadap Kekeringan. Skripsi. Fakultas Pertanian, Universitas Lampung.
Ray, J.D & Sinclair, T. R. 1998. The Effect Of Pot Size On Growth And Transpiration Of Maize And Soybean During Water Deficit Stress. J. Exp. Bot. 49 (325): 1381- 1386.
Red, S.B. 1992. Pengantar Tentang Bahaya. Edisi ke-3. UNDP dan DMTP.
Reddy, A. R., Chaitanya, K. V., Vivekanandan, M. 2004. Drought-induced responses of photosynthesis and antioxidant metabolism in higher plants. Journal of plant physiology 161: 1189-1202.
Rizal, A.R. & Tsan, F.Y. 2007. Rainfall Impact On Oil Palm Production And OER At FELDA Triang 2. http://www.ipicex.com (27 November 2013).
Römheld, V., & Kirkby, E. A. 2010. Research On Potassium In Agriculture: Needs And Prospects. Plant Soil 335 :155–180.
88
Rosmarkam, A., & Nasih, V. Y. 2002. Ilmu Kesuburan Tanah. Kanisius. Yogyakarta.
Salisbury, B.F., & Ross, W. C. 1995. Fisiologi Tumbuhan Jilid Tiga (terjemahan).
ITB, Bandung.
Salisbury, F.B., & Ross, C.W. 1995. Fisiologi Tumbuhan Jilid 3 (Edisi Bahasa Indonesia). Bandung: Penerbit ITB (Institut Teknologi Bandung).
Sarief, E. S., 1986. Ilmu Tanah Pertanian. Pustaka Buana, Bandung.
Setiawan, Tohari, dan D. Shiddieq. 2013. Pengaruh Cekaman Kekurangan Air Terhadap Beberapa Karakter Fisiologis Tanaman Nilam (Pogosternon Cablin Benth). J. Littri. 108-116.
Setiawan., Tohari., Shiddieq, D. 2013. Pengaruh Cekaman Kurang Air Terhadap Beberapa Karakter Fisiologis Tanaman Nilam ( Pogostemon cablin Benth) Jurnal Litri 19 (3): 108-116
Sharma, V. ., & Fletcher, J. 2002. Maintenance Of Shoot And Floral Meristem Cell Proliferation And Fate. Plant Physiology, 129(1): 31–39.
Silva, MA, Sharma, V, Jifon, JL & da Silva, JAG 2010, Assessment chlorophyll and leaf relative water content as indicator of drought tolerance on sugarcane initial growth, Proc. Int. Soc. Sugar Cane Technol., 27:1–8.
Siregar, H. H., Darmosarkoro, W., & Poeloengan, Z. 1998. Oil Palm Yield Simulation Using Drought Characteristic.. Proceedings 1998 International Oil Palm Conference. Nusa Dua Bali: 585- 594
Siregar, H.H., Harahap, I.Y., Darmosarkoro, W., & Sutarta, E. E. 2005. Kultur Teknis Untuk Musim Kemarau Pada Perkebunan Kelapa Sawit. Makalah disampaikan dalam Seminar Dampak dan Antisipasi Kemarau 2005 pada Usaha Agribisnis Perkebunan. Bandung.
Siregar, H.H., Purba, A., Syamsuddin, E., & Poeloengan, Z. 1995. Penanggulangan Kekeringan Pada Tanaman Kelapa Sawit. Warta PPKS 3 (1) : 9-13.
Sitompul, S. M., Guritno, B. 1995. Analisis Pertumbuhan tanaman. Gadjah Mada University Press: 202.
Smith, B. G. 1988. The Effects of Soil Water and Atmospheric Vapour Pressure Deficit on Stomatal Behaviour and Photosynthesis in the Oil Palm. Journal of Experimental Botany, Vol. 40 (215) : 647-651.
Smith, B. G. 1989. The effects of Soil Water and Atmospheric Vapour Presssure Deficit on Stomatal Behaviour and Photosynthesis in the Oil Palm. Journal of Experimental Botany: 647-651.
Soegijatni S & Suyamto. 2000. Uji Daya Hasil Pendahuluan Kedelai Toleran kekeringan. Laporan Teknik Hasil Penelitian. Balai Penelitian Tanaman Kacang-kacangan dan Umbi-umbian: 25-26.
Sudrajat., & Siagian, N.A. 2014. Pengaruh Pemupukan Fosfor dan Kalium Terhadap Pertumbuhan Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) di Pembibitan Utama. Agrovigor 7(2).
Suhartina, 2011. Pemulian Tanaman Kedelai Toleran terhadap Cekaman Kekeringan. Bul. Palawija. 21: 26–38.
Sujinah and Jamil. 2016. Mekanisme respon tanaman padi terhadap cekaman kekeringan dan varietas toleran. Iptek Tanaman Pangan. Vol 11 (1). Badan Litbang Pertanian Kementrian Pertanian Indonesia.
89
Sujinah., Jamil, A. 2016. Mekanisme Respon Tanaman Padi terhadap Cekaman Kekeringan dan Varietas Toleran. Iptek Tanaman Pangan Vol 1 (1): 1-8.
Sukarjo, H., Hidayah, A., & Zulaechah, I. 2017. Keseimbangan Dan Ketersediaan Kalium Dalam Tanah Dengan Berbagai Input Pupuk Pada Sistem Sawah Tadah Hujan. Prosiding Seminar Nasional Fakultas Pertanian Universitas Sebelas Maret. 1 (1).
Sun C., H. Cao., H. Shao., X. Lei, and Y. Xiao. 2011. Growth and physiological responses to water and nutrient stress in oil palm. Afr J Biotechnol.
10:10465–10471.
Sun, C., Cao, H., Shao, H., Lei, X, Xiao, Y. 2011. Growth and physiological responses to water and nutrient stress in oil palm. Afr. J. Biotechnol. Vol 10 (51): 10465-10471.
Suprapto. 1998. Bertanam Kedelai. Penebar Swadaya. Jakarta
Suresh, K., Nagamani, C., Kantha, D. L., Kumar, M. K. 2012. Changes in photosynthetic activity in five common hybrids of oil palm (Elaeis guineensis Jacq.) seedlings under water deficit. Photosynthetica 50 (4):
549-556
Suryani, E. 2017. Efek Kalium Terhadap Cekaman Kekeringan Kangkung Air (Ipomoea Aquatica Forssk. ) Setelah Diinokulasi Dengan Mikoriza (Rhizoctonia Sp. ) Secara In Vitro. Skripsi. Universitas Bandar Lampung.
Sutarta ES, Rahutomo S, Darmosarkoro W, Winarna. 2007. Peranan unsur hara dan sumber hara pada pemupukan tanaman kelapa sawit. Di dalam:
Darmosarkoro W, Sutarta ES, Winarna, editor. Lahan dan Pemupukan Kelapa Sawit. Ed ke-1. Medan (ID): Pusat Penelitian Kelapa Sawit. hlm 79–
90.
Syakir, M., & Gusmaini. 2012. Pengaruh Penggunaan Sumber Pupuk Kalium Terhadap Produksi dan Mutu Minyak Tanaman Nilam. Jurnal Penelitian Tanaman Industri 18(2): 60-65.
Tavakkoli, E., P. Rengasamy, and G.K. McDonald. 2010. High concentrations of Na+ and Cl- ions in soil solution have simultaneous detrimental effects on growth of faba bean under salinity stress. J. Exp. Bot. 61:4449-4459.
Turner, P.D., & Gilbanks, R. A. 1974. Oil Palm Cultivation And Management. The Incorporated Society of Planters. Kuala Lumpur: 672.
Ullah, F., Bano, A., Nosheen, A. 2012. Effects of Plant Growth Regulator On Growth and Oil Quality of Calona (Brassica napus L.) under Drought Stress. Pak. J.
Bot. 44 (6) : 1873-1880.
Veranica, N. 2014. Kebutuhan Air Kelapa Sawit dan Domestik Pada Wilayah Perkebunan Kelapa Sawit Binturung Estate Kecamatan Pamukan Utara Kalimantan Selatan. Jurnal Aterior. 13 (2): 167-172.
Violita. 2007. Komparasi Respon Fisiologi Tanaman Kedelai Yang Mendapat Cekaman Kekeringan Dan Perlakuan Herbisida Paraquat. Institut Pertanian Bogor.
Von Uexkull, H.R. & Fairhurst, T.H. 1991. Fertilizing For High Yoeld An Quality The Oil Palm. IPI Bulletin 12.
90
Wang, L. 2014. Physiological And Molecular Responses To Drought Stress In Rubber Tree (Hevea brasiliensis Muell. Arg.). Plant Physiology and Biochemistry. 83: 243–249.
Wang, M., Zheng, Q., Shen, Q., & Guo, S. 2013. The Critical Role Of Potassium In Plant Stress Response. International Journal of Molecular Sciences. 14 :7370-7390.
Wei, J., Li, C., Li, Y., Jiang, G., Cheng, G. Zheng, Y. 2013. Effects Of External Potassium (K) Supply On Drought Tolerances Of Two Contrasting Winter Wheat Cultivars. PLoS ONE 8(7): 1-11.
Wihardjaka, A.K., Idris, A., Rachim, & Partohardjono, S. 2002. Pengelolaan Jerami dan Pupuk Kalium pada Tanaman Padi di Lahan Sawah Tadah Hujan Kahat K. Jurnal Penelitian Pertanian Tanaman Pangan. 2(1): 26-32.
Wijana, G. 2001. Analisis Fisiologi, Biokimia Dan Molekuler Sifat Toleran Tanaman Kelapa Sawit (Elaeis guineensis Jacq.) Terhadap Cekaman Kekeringan.
(Disertasi) Program Pascasarjana, Institut Pertanian Bogor. Bogor: 145.
Winarso, S. 2005. Kesuburan Tanah Dasar Kesehatan dan Kualitas Tanah. Gava Media, Yogyakarta.
Wu, F., Bao, W., Li, F., Wu , N. 2008. Effects of drought stress and N supply on the growth, biomass partitioning and water-use efficiency of Sophora davidii seedlings. Environmental and Experimental Botany 63: 248–255.
Yang, L., J. Zhang, J. He, Y. Qin, D. Hua, Y. Duan, Z. Chen, and Z. Gong. 2014.
ABA mediated ROS in mitochondria regulate root meristem activity by controlling PLETHORA expression in arabidopsis. PLOS Genetics. 10: 118.
Yohana, C., Sulistyaningsih, Dorly, & Akmal, H. 1994. Studi Anatomi Daun Saccharum Spp . Sebagai Induk Dalam Pemuliaan Tebu. Hayati. 1(2): 32–
36.
Yoshiba, Y., Kiyosue, T., Nakashima, K., Yamaguchi, S. & Shinozaki, K. 1997.
Regulation Of Levels Of Proline As An Osmolyte In Plants Underwater Stress. Plant & Cell Physiology. 38: 1095-1102.
Zeng, Q. & Brown, P. H. 2001. Potassium Fertilization Affects Soil K, Leaf K Concentration, and Nut Yield and Quality of Mature Pistachio Trees.
Hortscience. 36 (1):85–89.
Zhang, K. & Feng H. 2010. Fermentation Potentials Of Zymomonas Mobilis And Its Application In Ethanol Production From Low-Cost Raw Sweet Potato.
African Journal of Biotechnology. 9(37): 6122-6128.
Zlatev, Z., & Lidon, F. C. 2012. An Overview On Drought Induced Changes In Plant Growth, Water Relations And Photosynthesis. Emir. J. Food Agric. 24 (1):
57–72.
Zulfita, D. 2012. Kajian Fisiologi Tanaman Lidah Buaya dengan Pemotongan Ujung Pelepah pada Kondisi Cekaman Kekeringan. J. Perkebunan & Lahan Tropika. Vol. 2 (1) 7-14
