A factorial experiment which examined the effects of sowing date, cultivar and irrigation frequency on the growth and grain yield of irrigated wheat was conducted at Narrabri, New South Wales. Irrigation scheduling was based on morning values of leaf water potentials (Ψl): plots were watered when Ψl, had fallen to either −0.8 MPa or −0.4 MPa or were not irrigated during the season.
Maximum leaf areas, tiller numbers and total dry matter production were increased by more frequent irrigation, but subsequent tiller death and leaf senescence were generally not reduced by increasing watering. A delay in sowing from 23 June to 23 July reduced yields by 20%, on average. More frequent irrigation increased yields at both sowing dates, but a high protein, locally bred wheat (Songlen) responded less than a cultivar derived from the CIMMYT program (WW 15). The highest yield for Songlen was 570 g m−2 which was lower than the highest yield for WW 15 (730 g m−2); both were obtained from the −0.4 MPa treatment sown on 23 June. Compared with irrigated wheat grown in Mexico or southern New South Wales, dry matter production after anthesis at Narrabri was low. It was suggested that high temperatures after anthesis may limit post-anthesis productivity and subsequently, grain yields. The results of this experiment suggested that yields of irrigated wheat in the lower Namoi Valley can be improved through better irrigation management and varietal improvement, but the magnitude of this response may be limited by high spring temperatures.
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Australian Bureau of Statistics (1975–76) Agricultural Sector. Land Use, Artificial Fertilisers, and Other Improvements, New South Wales
Australian Bureau of Statistics (1980–81) Agricultural Sector. Land Use, Artificial Fertilisers and Other Improvements. New South Wales
Bidinger F, Musgrave RB, FischerRA (1977) Contribution of stored pre-anthesis assimilate to grain yield in wheat and barley. Nature 270:431
Cooper JL (1979) Growth and yield of a semidwarf and a standard height wheat cultivar in the MIA. Aust J Exp Agric Anim Hush 19:554
Cooper JL (1980) The effect of nitrogen fertilizer and irrigation frequency on a semidwarf wheat in southeast Australia. 1. Growth and yield. Aust J Exp Agric Anim Hush 20:359
Evans LT, Wardlaw IF, Fischer RA (1975) Wheat. In: Evans LT (ed) Crop Physiology: some case histories. Cambridge University Press, London, pp 101–149
Fawcett RG, Carter OG (1973) Utility of a simple soil water budget model in agronomic research. I. Effects of plant density, time of sowing and fallow water on available soil water under spring wheat. Aust J Exp Agric Anim Hush 13:714
Fischer RA, Kohn GD (1966) The relationship of grain yield to vegetative growth and postflowering leaf area in the wheat crop under conditions of limited soil moisture. Aust J Agric Res 17:281
Fischer RA, Aguilar I, Laing DR (1977a) Postanthesis sink size in a high-yielding dwarf wheat: yield response to grain number. Aust J Agric Res 28:165
Fischer RA, Lindt JH, Glave A (1977b) Irrigation of dwarf whets in the Yaqui Valley of Mexico. Exp Agric 13:353
Francis A, Evans G, Fitzel R (1975) Control of cotton wilt. Agric Gaz NSW 86:36
McDonald GK, Sutton BG, Ellison FW (1983) The effect of time of sowing on the grain yield of irrigated wheat in the Namoi Valley, New South Wales. Aust J Agric Res 34:229
Mengersen AG (1976) Irrigated wheat survey for 1975. Cotton Newsletter, May
Northcote KH (1965) A factual key for the recognition of Australian soils (2nd edition). CSIRO Division of Soils, Divisional Report 2/65
Spiertz JHJ (1974) Grain growth and distribution of dry matter in the ear as influenced by temperature, light energy and ear size. Neth J Agric Sci 22:207
Spiertz JHJ (1977) The influence of temperature and light intensity on grain growth in relation to carbohydrate and nitrogen economy of the wheat plant. Neth J Agric Sci 25:182
Syme JR (1969) A comparison of semidwarf and standard height wheat variety at two levels of water supply. Aust J Exp Agric Anim Husb 9:528
Syme JR (1970) A high-yielding Mexican semi-dwarf wheat and the relationship of yield to harvest index and other varietal characteristics. Aust J Exp Agric Anim Hush 10:350
Yeggapan TM, Mainstone BJ (1981) Comparisons between press and pressure chamber techniques for measuring water potential. Exp Agric 17:75
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McDonald, G.K., Sutton, B.G. & Ellison, F.W. The effect of sowing date, irrigation and cultivar on the growth and yield of wheat in the Namoi River Valley, New South Wales. Irrig Sci 5, 123–135 (1984). https://doi.org/10.1007/BF00272550
- Leaf Senescence
- Leaf Water Potential
- Tiller Number
- Irrigation Schedule
- Sowing Date