References
- Anderson , G. , Olered , R. and Olsson , G. 1958 . Nutrient uptake by winter rape . Z. Acker Pflanzenbau , 107 : 171 – 179 .
- Bailey , L. D. and Soper , R. J. 1985 . “ Potassium nutrition of rape, flax, sunflower and safflower ” . In Potassium in agriculture , Edited by: Munson , R. D. 765 – 798 . Madison, Wisconsin : American Society of Agron., Crop Sci. Soc. Amer., Soil Sci. Soc. Amer. .
- Engel , R. E. and Zubriski , J. C. 1982 . Nitrogen concentrations in spring wheat at several growth stages . Comm. Soil Sci. Plant Anal. , 13 : 531 – 544 .
- Holmes , M. R. J. 1980 . Nutrition of the oilseed rape crop. , Barking, Essex, , U.K. : Applied Science Pub. .
- Holmes , M. R. J. and Ainsley , A. M. 1977 . Fertilizer requirements of spring oilseed . J. Sci. Food Agric. , 28 : 301 – 311 .
- Macy , P. 1936 . The quantitative mineral nutrient requirements of plants . Plant Physiol. , 11 : 749
- Pissarek , H. P. 1973 . The development of potassium deficiency symptoms in summer rape . Z. Pflanzenernaehr. Bodenkd. , 136 : 1 – 19 .
- Rama Rao , N. in press . Potassium requirements for growth and its related processes determined by plant analysis in wheat . Plant and Soil ,
- Schultz , J. E. R. 1972 . Investigations on the seasonal changes in dry matter production and uptake of mineral elements in winter rape (Brassica napus) . Tidsskr. Planteavl , 76 : 415 – 435 .
- Shekhawat , G. S. , Mehta , U. R. and Bhandari , B. V. S. 1972 . A note on response of mustard to NPK fertilizers in South‐west Rajasthan . Indian J. Agron. , 17 : 367 – 369 .
- Ulrich , A. and Hills , F. J. 1973 . “ Plant analysis as an aid in fertilizing sugar crops ” . In Soil Testing and Plant Analysis , Edited by: Walsh , L. M. and Beaton , J. D. 271 – 288 . Madison, Wisconsin : Soil Sci. Soc. Amer. .
- Watson , D. J. The physiological basis of the effect of potassium on crop yield . Proc. 4th Congr. Int. Potash Inst. pp. 102 – 119 .