Angland J, Billen G and Garnier J. 2015. Relationships for estimating N2 fixation in legumes: incidence for N balance of legume-based cropping systems in Europe. Ecosphere, 6(3): 1-24.
Cataldo DA, Haroon M, Schrader LE and Youngs VL. 1975. Rapid colorimetric determination of nitrate in plant tissue by nitration of salicylic acid. Communications in Soil Science and Plant Analysis, 6: 71–80.
Chapagain T and Riseman A. 2014. Intercropping wheat and beans: effects on agronomic performance and land productivity. Crop Science, 54: 2285-2293.
Cong WF, Hoffland E, Li L, Six J, Haosun J, Bao X, Zhang F and Werf W. 2014. Intercropping enhances soil carbon and nitrogen. Global Change Biology, 21(4): 1715-1726.
Corre-Hellou G, Brisson N, Launay M, Fustec J and Crozat Y. 2007. Effect of root depth penetration on soil N sharing and dry matter in pea-barley intercrops given different soil N supplies. Field Crop Research, 103: 76–85.
Darapuneni MK, Angadi SV and Umesh MR. 2018. Canopy development of annual legumes and forage sorghum intercrops and its relation to dry matter accumulation. Agronomy Journal, 110 (3): 939-949.
Du Q, Zhou L, Chen P, liu X, Song C, Yang F, Wang X, Liu W, Sun X, Du J, Liu J, Shu K, Yang W and Yong T. 2019. Relay-intercropping soybean with maize maintains soil fertility and increases nitrogen recovery efficiency by reducing nitrogen input. The Crop Journal, 8(1): 140-152.
Eskandari H and Ghanbari A. 2011. Evaluation of competition and complementarity of Corn (Zea mays) and Cowpea (Vigna sinensis) intercropping for nutrient consumption. Agricultural Science and Sustainable Production, 21(2): 67-75. (In Persian).
Eskandari H and Javanmatd A. 2014. Evaluation of forage yield and quality in intercropping patterns of Maize (Zea mays) and Cow pea (Vigna sinensis). Agricultural Science and Sustainable Production, 23(4): 101-110. (In Persian).
Finley KAB and Ryan MR. 2018. Advancing intercropping research and practices in industrialized agricultural landscapes. Agriculture, 8(80): 1-24.
Fustec J, Lesuffleur F, Mahieu S and Cliquet JB. 2010. Nitrogen rhizodeposition of legumes. A review. Agronomy for Sustainable Development, 30: 57-66.
Ghosh PK, Tripathi AK, Bandyopadhyay KK and Manna MC. 2009.Assessment of nutrient competition and nutrient requirement intercropping system. European Journal of Agronomy, 31: 43-50.
Greenwood DJ, Lemaire G, Gossee G, Cruz P, Draycott A and Neeteson JJ. 1990. Decline in percentage N of C3 and C4 crops with increasing plant mass. Annals of Botany, 66: 425-436.
Herridge DF. 1984. Effects of nitrate and plant development on the abundance of nitrogenous solutes in root-bleeding and vacuum extracted exudates of soybean. Crop Science, 25: 173-179.
Hungria M, Franchini JC, Campo RJ, Crispino CC, Moraes JZ, Sibaldelli RNR, Mendes IC and Arihara J. 2006. Nitrogen nutrition of soybean in Brazil: contributions of biological N2 fixation and of N fertilizer to grain yield. Canadian Journal of Plant Science, 86: 927-939.
Igbal MA, Hamid A, Hussain I, Siddiqui MH, Ahmad T, Khaliq A and Ahmad Z. 2019. Competitive indices in cereal and legume mixtures in a south Asian environment, 111 (1): 1-8.
Islam MA and Adjesiwor AT. 2018. Nitrogen fixation and transfer in agricultural production systems. Pp. 95-110. In: Khan A. and Fahad S (eds). Nitrogen in Agriculture. INTECH- London.
Jamont M, Guillaume P and Fustec J. 2013. Sharing N resources in the early growth of rapeseed intercropped with faba bean: does N transfer matter? Plant and Soil, 371 (1-3): 651-653.
Kong L, Xie Y, Hu L, Feng B and Li S. 2016. Remobilization of vegetative nitrogen to developing grain in wheat, review. Field crop Research, 196: 134-144.
Latati M, Bargaz A, Belarbi B, Lazali M, Benlahrech S, Tellah S, Kaci G, Drevon J and Ounane S. 2016. The intercropping common bean with maize improves the rhizobial efficiency, resource use and grain yield under low phosphorus availability. European Journal of Agronomy, 72: 80-90.
Layek J, Shivakumar BG, Rana DS, Munda S, Lakshman K, Das A and Ramkrushna GI. 2014. Soybean–Cereal intercropping systems as influenced by nitrogen nutrition. Agronomy Journal, 106 (6): 1933-1946.
Loreau M and Hector A. 2001. Partitioning selection and complementarity in biodiversity experiments. Nature, 412: 72–76.
Mead R and RW Willey. 1980. The concept of a land equivalent ratio and advantages in yields for intercropping. Experimental Agriculture, 16: 217–228.
Miller AJ and Cramer MD. 2005. Root nitrogen acquisition and assimilation. Pp. 1-36. In: Lambers H and Colmer TD (eds). Root physiology: from gene to function. Springer- Dordrecht.
Neugschwandtner RW and Kaul HP. 2015. Nitrogen uptake, use and utilization efficiency by oat–pea intercrops. Field Crop Research, 179: 113-119.
Prihofer-walzl K. and Rasmussen J. 2012. Nitrogen transfer from forage legumes to nine neighbouring plants in a multi-species grassland. Plant Soil, 350: 71-84.
Saedi M, Raei Y, Amini R, Taghizadeh A and Pasban Eslam B. 2018. Evaluation of yield and protein content of Safflower (Carthamus tinctorius) in intercropping with Faba bean (Vicia faba L.) under biological and chemical fertilizers. Agricultural Science and Sustainable Production, 28(4): 247-260.
(In Persian).
Sinebo W, Gretzmacher R and Edelbauer A. 2004. Genotypic variation for nitrogen use efficiency in Ethiopian barely. Field Crops Research, 85(1): 43-60.
Unkovich M, Herridge DF, Peoples M, Cadisch G, Boddey B, Giller K, Alves B and Chalk P. 2008. Measuring plant-associated nitrogen fixation in agricultural systems. Australian Center for International Agricultural Research (ACIAR).
Young EG and Conway CF. 1942. On the estimation of allantoin by the Rimini-Schryver reaction. Journal of Biological Chemistry, 142: 839–853.
Yu Y, Stomph TJ, Makowski D and Werf WV. 2015. Temporal niche differentiation increases the land equivalent ratio of annual intercrops: A meta-analysis. Field Crop Research, 184: 133-144.
Zang H, Yang X, Feng X, Qian X, Hu Y, Ren C and Zeng Z. 2015. Rhizodeposition of nitrogen and carbon by Mungbean (Vigna radiate L.) and its contribution to intercropped oats (Avena nuda L.). PLOS One, 10(5): 1-14.
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 Environment, 59(2): 80-88.
)