Effect of Sowing Date and Intra-Row Spacing on Growth and Yield of Groundnut at El Rahad Agricultural Scheme
الملخص
The effects of sowing date and intra-row spacing on growth and yield of groundnut (Arachis hypogaea L.) were evaluated over a 3- year period in the irrigated Rahad Scheme. The main effects of sowing date and intra-row spacing were significant but their interactions were not. Late sowing in August and September resulted in small plants with fewer pods, low biological and pod yields due to their development under the low temperatures of November, December and January. On the other hand, high number of pods was produced per plant at wide intra-row spacing but most of the pods were immature with poor shelling percentage and low 100-seed weight. This was attributed to the uneven maturity of groundnut at harvest where pods were initiated over a longer period of time particularly in the low plant population. Early sowing (June) and the high plant population (250000 plants/ ha) proved to be essential package components for the alternately branched variety (MH383) under irrigated vertisol of El Rahad Agricultural Scheme.
المراجع
selected groundnut cultivars in the central irrigated vertisols. Proceedings of the Sudan National Variety Release Committee, Medani , Sudan.
Dawelbeit, M.I. and E.A. Babiker. 1997. Effect of tillage and method
of sowing on wheat yield in irrigated vertisols of Rahad, Sudan. Soil and Tillage Research 42:127-132.
Gibbons, R.W. 1980. Groundnut (Arachis hypogaea L.), pp.482-493 In :R.J. Summerfield and A.H. Bunting (eds). Advances in Legume
Science. Kew, London.
Hamada, A. E. A. Babiker and F. M. Khalifa. 1988. Effect of weeds, nitrogen and phosphorus fertilizers on pod yield and growth of groundnut at Rahad (Sudan). Oleagineux 43(10): 379-382.
Ishag, H.M. 1965. Effect of Sowing dates on yield of irrigated groundnut in Gezira. African Soils 10: 509-521..
Ishag, H. M. 1970. Growth and yield of irrigated groundnuts (Arachis
hypogaea L.) grown at different spacings in the Sudan. Journal of Agricultural Science, Cambridge 74:533-537.
Jackson, J.E. 1967. Studies on the sowing dates of cotton in the Sudan Gezira. The influence of date of sowing on plant growth and
development. Journal of Agricultural Science, Cambridge 69:305-315.
Nur, M.I. and A.A. Elgasim. 1977. Effect of sowing date on groundnuts in Sudan Gezira . Experimental Agriculture 14:13-16.
SAS. 1985. SAS Institute Inc. SAS/STAT Guide for Personal Computers, Version 6 edition.
Saxena, N.P., M. Natarajan and M.S. Reddy. 1983. Potential Productivity of Field Crops Under Different Environments. Los Banos, Philippines: IRR 281-305
Smith, B. W. 1954. Arachis hypogaea L. Reproductive efficiency. American Journal of Botany 41:607-616.
