Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 21 references without a DOI — listed, not checked
no DOI — not checkedAbbasher A.A. (1994) Micro-organisms associated with Striga hermonthica and possibilities of their utilization as biological control agents, Ph.D. Thesis, University of Hohenheim, Germany, p. 144.
no DOI — not checkedCharreau C., Nicou R. (1971) L’amélioration du profil cultural dans les sols sableux et sabloagileux de la zone tropicale sèche Ouest-Africaine et ses incidences agronomiques, Agr. Trop. 76, 565–631.
no DOI — not checkedCharreau C., Vidal P. (1965) Influence de l’Acacia albida Del. sur le sol, la nutrition minerale et les rendements des mils Pennisetum au Sénégal, Agr. Trop. 20, 600–625.
no DOI — not checkedDancette C., Poulain J.F. (1968) Influence de l’Acacia albida sur les facteurs pédoclimatiques et rendements des cultures, Sols Afr. 13, 197–239.
no DOI — not checkedDoggett H. (1984) Striga: Biology and Control, An overview, in: Ayensu E., Dogget H., Keynes H.D., Marton-Lefevre J., Musselman L.J., Parker C., Pickering A. (Eds.), ICSU Press, Paris, pp. 27–36.
no DOI — not checkedFelker P. (1978) State of the Art: Acacia albida as a complementary permanent intercrop with annual crops. Proposal under contract for USAID, Riverside, Dept. of Soil and Envir. Sci., University of California.
no DOI — not checkedGomez K.A., Gomez A.A. (1984) Statistical Procedures for Agricultural Research, John Wiley & Sons, New York.
no DOI — not checkedGworgwor N.A. (1988) Agroforestry in millet and sorghum based cropping systems in the semi-arid zone of Nigeria: The case of Acacia albida Del, in: Proceedings Farming Systems Research/Extension Symposium, Farming Systems Paper Series No. 17, 349–356.
no DOI — not checkedGworgwor N.A., Weber H.C. (1990) Striga hermonthica (Del.) Benth. control in sorghum, in: Proceedings 14th Columa Conference, Int. Meet. Weed Control, Versailles, France, 1, pp. 387–395.
no DOI — not checkedGworgwor N.A., Anaso A.B., Gwary D.M. (2000) Occurrence of Striga species and mistletoes in the semi-arid zone of Nigeria, J. Arid Agr. 10, 29–35.
no DOI — not checkedGworgwor N.A., Ndahi W.B., Weber H.C. (2001) Parasitic weeds of North-eastern Nigeria: a new potential threat to crop production, Proceedings of British Crop Protection Council (BCPC) — Weeds 2001 Conference, Brighton, UK, pp. 181–186.
no DOI — not checkedHosmani M.M. (1978) Striga — a noxious parasitic weed, University of Agricultural Sciences, Dhawar, India.
no DOI — not checkedLast F.T. (1961) Direct and residual effect of Striga control treatments on sorghum yields, Trop. Agr. (Trinidad) 38, 49.
no DOI — not checkedParker C. (1984) The influence of Striga species on sorghum under varying nitrogen fertilization, in: Proceedings 3rd International Symposium on Parasitic Weeds, Aleppo, Syria, pp. 90–98.
no DOI — not checkedRayar A.J. (1983) University Farm Development Plan: Soil Survey, Department of Soil Science, University of Maiduguri, Nigeria.
no DOI — not checkedSaka A.R., Bunderson W.T. (1989) The potential of Acacia albida and Leucaena leucacephala for smallholder crop production system in Malawi, in: Trees for Development in sub-Saharan Africa, Proceedings of Regional Seminar held by IFS, ICRAF, Kenya, pp. 150–161.
no DOI — not checkedSauerborn J. (1991) The economic importance of the phytoparasites Orobanche and Striga, in: Proceedings 5th International Symposium on Parasitic Weeds, in: Ransom J.K. (Ed.), CYMMT, Nairobi, pp. 137–143.
no DOI — not checkedSherif A.M., Parker C. (1986) Effect of nitrogen sources and organic matter on Sorghum bicolour (L.) Moench and Striga hermonthica Benth, Ethiopian J. Agr. Sci. 19, 19–35.
no DOI — not checkedWeber F. (1978) Mid-point evaluation: Chad reforestation project, Prepared for CARE, Chad by Consultants in Development, Washington, DC (Mimeographed)
no DOI — not checkedWilson A.K., Parker C. (1984) Techniques for setting up pot experiments involving the parasitic weed Striga, in: Parker C., Musselman L.J., Polhill R.M., Wilson A.K. (Eds.), Proceedings 3rd International Symposium on Parasitic Weeds, ICARDA, Aleppo, Syria, pp. 133–142.
no DOI — not checkedWood P.J. (1989) Faidherbia albida: A monographed, Paris.
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