References
- Russell , J. S. 1968 . Nitrogen fertilizer and wheat in a semi‐arid environment. 2. Climatic factors affecting response . Aust. J. Exp. Agric. Anim. Husb. , 8 : 223 – 231 .
- Russell , J. S. 1968 . Nitrogen fertilizer and wheat in a semi‐arid environment. 3. Soil and cultural factors affecting response . Aust. J. Exp. Agric. Anim. Husb. , 8 : 340 – 348 .
- French , R. J. 1978 . The effect of fallowing on the yield of wheat. 11. The effect on grain yield . Aust. J. Agric. Res. , 29 : 669 – 684 .
- Papastylianou , I. , Graham , R. D. and Puckridge , D. W. 1982 . The diagnosis of nitrogen deficiency in wheat by means of a critical nitrate concentration in stem bases . Commun. Soil Sci. Plant Anal. , 13 : 473 – 485 .
- Heanes , D. L. 1982 . Determination of nitrate‐N in plants by an improved extraction procedure adapted for ultraviolet spectrophotometry . Commun. Soil Sci. Plant Anal. , 13 : 803 – 818 .
- Crooke , W. M. and Simpson , W. E. 1971 . Determination of ammonium in kjeldahl digests of crops by an automated procedure . J. Sci. Fd. Agric. , 22 : 9 – 10 .
- Smith , F. W. and Dolby , G. R. 1977 . Derivation of diagnostic indices for assessing the sulphur status of Panicum maximum var. tricboglume . Comrnun. Soil Sci. Plant Anal. , 8 : 221 – 240 .
- Withers , N. J. and Palenski , F. 1984 . An evaluation of the nitrate sap test for use on spring‐sown wheat . Proc. Agron. Soc. of N.Z. , 14 : 17 – 21 .
- Mason , M. G. , Rowley , A. M. and Quayle , D. J. 1972 . The fate of urea applied at various intervals after the sowing of a wheat crop on a sandy soil in Western Australia . Aust. J. Exp. Agric. Anim. Husb. , 12 : 171 – 175 .
- Gardner , B. R. and Jackson , E. B. 1976 . Fertilization, nutrient composition, and yield relationships in irrigated spring wheat . Agron. J. , 68 : 75 – 78 .
- Papastylianou , I. , Graham , R. D. and Puckridge , D. W. 1984 . Diagnosis of the nitrogen status of wheat at tillering and prognosis for maximum grain yield . Conmun. Soil Sci. Plant Anal. , 15 : 1423 – 1436 .