- Abebe, Z. and Feyisa, H. (2017). Effects of nitrogen rates and time of application on yield of maize: Rainfall variability influenced time of N application. International Journal of Agronomy. 2017: 1-10.
- Akhtar, S.S., Li, G. andersen, M.N. and Liu, F. (2014). Biochar enhances yield and quality of tomato under reduced irrigation. Agricultural Water Management. 138: 37-44.
- Alam, T., Kurniasih, B., Suryanto, P., Basunanda, P., Supriyanta, Ambarwati, E., Widyawan, M.H., Handayani, S. and Taryono (2019). Stability analysis for soybean in agroforestry system with kayu putih. SABRAO Journal of Breeding and Genetics. 51: 405-418.
- Alam, T., Suryanto, P., Handayani, S., Kastono, D. and Kurniasih, B. (2020). Optimizing application of biochar, compost and nitrogen fertilizer in soybean intercropping with kayu putih (Melaleuca cajuputi). Revista Brasileira de Ciência do Solo. 44: e0200003.
- Coumaravel, K., Santhi, R., Kumar, V.S. and Mansour, M.M. (2011). Biochar - A promising soil additive - A review. Agricultural Reviews. 32(2): 134-139.
- Coumaravel, K., Santhi, R. and Maragatham, S. (2015). Effect of biochar on yield and nutrient uptake by hybrid maize and on soil fertility. Indian Journal of Agricultural Research. 49(2): 185-188.
- Clough, T.J. and Condron, L.M. (2010). Biochar and the nitrogen cycle: Introduction. Journal of Environmental Quality. 39(4): 1218-1223.
- Dunjana, N., Nyamugafata, P., Shumba, A., Nyamangara, J. and Zingore, S. (2012). Effects of cattle manure on selected soil physical properties of smallholder farms on two soils of Murewa, Zimbabwe. Soil Use and Management. 28(2): 221-228.
- Emrich, W. (1985). Handbook of Biochar Making - The Traditional and Industrial Methods. Commission of the European Communities Directorate, Luxembourg City.
- Fageria, N.K. (2014). Nitrogen Management in Crop Production. CRC Press, New York, USA.
- Gross, J. (1991). Pigmentin Vegetable, Chlorophyll and Caretinoids. Van Nonstrand Reinhold, New York, USA.
- Hagner, M., Kemppainen, R., Jauhiainen, L., Tiilikkala, K. and Setälä, H. (2016). The effects of birch (Betula spp.) biochar and pyrolysis temperature on soil properties and plant growth. Soil and Tillage Research. 163: 224-234.
- Indonesian Legumes and Tuber Crops Research Institute. (2016). Description of Superior Varieties of Legumes 1918-2016. Indonesian legumes and Tuber Crops Research Institute, Malang, Jawa Timur, Indonesia. (Retrieved from http://balitkabi.litbang.pertanian.go.id/wp-content/uploads/2016/09/kedelai.pdf).
- International Fertilizer Development Center (IFDC) (2013). Fertilizer Deep Placement - IFDC. International Fertilizer Development Center (IFDC). Solutions, USA. (Retrieved from https://ifdc.org/2013/09/23/fertilizer-deep-placement/).
- Kanouo, B.M.D., Allaire, S.E. and Munson, A.D. (2018). Quality of biochars made from eucalyptus tree bark and corncob using a pilot-scale retort kiln. Waste and Biomass Valorization. 9(6): 899-909.
- Koocheki, A., Nassiri Mahallati, M.N., Moradi, R. and Mansoori, H. (2014). Optimizing water, nitrogen and crop density in canola cultivation using response surface methodology and central composite design. Soil Science and Plant Nutrition. 60(2): 286-298.
- Krywult, M. and Bielec, D. (2013). Method of measurement of nitrate reductase activity in field conditions. Journal of Ecological Engineering. 14: 7-11.
- Li-Cor. (1999). Using the Li-6400 - Portable Photosynthesis System. LI-COR Inc., Lincoln, NE, USA.
- Loussaert, D., Clapp, J., Mongar, N., O’Neill, D.P. and Shen, B. (2018). Nitrate assimilation limits nitrogen use efficiency (NUE) in maize (Zea mays L.). Agronomy. 8(7): 110.
- Marquardt, D.W. and Snee, R.D. (1975). Ridge regression in practice. The American Statistician. 29(1): 3-20.
- Marschner, H. (2012). Mineral Nutrition of Higher Plants. Academic Press, London, UK.
- Ministry of Agriculture. (2015). The 2015-2019 Strategic Plan. Ministry of Agriculture, Jakarta, Indonesia.
- Mulyani, A., Nursyamsi, D. and Syakir, M. (2017). Strategy of land resource utilization to achieve sustainable rice self-sufficiency. Jurnal Sumberdaya Lahan. 11(1): 11-22.
- Myers, R.H., Montgomery, D.C. and Cook, C.M.A. (2009). Response Surface Methodology: Process and Product Optimization using Designed Experiments. John Wiley and Sons, NJ, USA.
- Nurmalasari, A.I., Supriyono, Suryanto, P. and Alam, T. (2020). Effectiveness of Melaleuca cajuputi biochar as a leaching loss for nitrogen fertilizer and intercropping in maize. Indian Journal of Agricultural Research. 54(4): 506-510.
- Purbajanti, E.D., Slamet, W., Fuskhah, E. and Rosyida (2016). Effects of organic and inorganic fertilizers on growth, activity of nitrate reductase and chlorophyll contents of peanuts (Arachis hypogaea L.). IOP Conference Series: Earth and Environmental Science. 250: 012048.
- Rathke, G.W., Behrens, T. and Diepenbrock, W. (2006). Integrated nitrogen management strategies to improve seed yield, oil content and nitrogen efficiency of winter oilseed rape (Brassica napus L.) - A review. Agriculture, Ecosystems and Environment. 117(2-3): 80-108.
- SAS Institute. (2013). SAS System for Windows 9.4. SAS Institute Inc., NC, USA.
- Solanki, A.C., Solanki, M.K., Nagwanshi, A., Dwivedi, A.K. and Dwivedi, B.S. (2018). Nutrient uptake and grain yield enhancement of soybean by integrated application of farmyard manure and NPK. International Journal of Current Microbiology and Applied Sciences. 7(9): 1093-1102.
- Statistics Indonesia. (2018). Volume and Value of Indonesian Soybean Imports (2013-June 2018). Statistics Indonesia, Jakarta, Indonesia.
- Suryanto, P., Faridah, E., Nurjanto, H.H., Supriyanta, Kastono, D., Putra, E.T.S., Handayani, S., Dewi, A.K. and Alam, T. (2020). Influence of Siam weed compost on soybean varieties in an agroforestry system with kayu putih (Melaleuca cajuputi). Biodiversitas Journal of Biological Diversity. 21(77): 3062-3069.
- Torane, H.B., Kasture, M.C., Kokare, V.G. and Sanap, P.B. (2017). Effect of bio-degradable coated fertilizer briquettes and their application time on growth, yield and nutrient content on soil properties of cucumber in lateritic soil of Konkan Maharashtra. International Journal of Chemical Studies. 5(5): 27-32.
- Zhang, X., Huang, G., Bian, X. and Zhao, Q. (2013). Effects of root interaction and nitrogen fertilization on the chlorophyll content root activity, photosynthetic characteristics of intercropped soybean and microbial quantity in the rhizosphere. Plant, Soil and Environment. 59(2): 80-88.
- Zhao, H., Li, X. and Jiang, Y. (2019). Response of nitrogen losses to excessive nitrogen fertilizer application in intensive greenhouse vegetable production. Sustainability. 11(6): 1-15.
Submitted Date : 24-08-2020
Accepted Date : 10-10-2020
First Online: