REFERENCES
- 1996 . African Farming and Food Processing 20 – 21 . Growing the golden leaf. African Farming (Nov/Dec)
- Akehurst , B. C. 1968 . Tobacco , London, UK : Longman Group Ltd, Lowe and Brydon Printers Ltd .
- Barnard , E. L. , Kannwischer-Mitchell , M. E. and Fraedrich , S. W. 1996 . Development and performance of slash and loblolly pine seedlings produced in fumigated nursery seedbeds and seedbeds amended with organic residues , Gainesville, FL : Soil and Water Department of Extension Services; Institute of Food and Agricultural Sciences, University of Florida .
- Bennett , W. F. 1993 . “ Plant nutrient utilization and diagnostic plant symptoms ” . In Nutrient deficiencies and toxicities in crop plants , Edited by: Bennett , W. F. 1 – 7 . St. Paul, MN, , USA : The American Pathological Society .
- Bilderback , T. E. , Fonteno , W. C. and Johnson , D. R. 1999 . Physical properties of media composed of peanut hulls, pine bark and peat moss and their effect on azalea growth . American Society of Soil Science Journal, HortScience Journal , 107 ( 3 ) : 522 – 525 .
- Blom , T. J. 1993 . Working with soil-less mixes . Florists Review , 173 ( 4480 ) : 29 – 34 .
- Bremner , J. M. and Mulvaney , C. S. 1982 . “ Nitrogen-Total ” . In Methods of Soil Analysis , Edited by: Page , A. L. 595 – 622 . Madison, M.I : American Society of Agronomy . Agronomy Series No. 9, Part 2
- Cakmak , I. and Marschner , H. 1988 . Increase in membrane permeability and exudation in roots of Zn deficient plants . Journal of Plant Physiology , 132 : 356 – 361 .
- Cassman , K. G. , Kerby , T. A. , Roberts , B. A. , Brayant , D. C. and Brouder , S. M. 1989 . Differential response of two cotton cultivars to fertilizer and soil potassium . Journal of Agronomy , 81 : 870 – 876 .
- Fonteno , W. C. , Cassel , D. K. and Larson , R. A. 2001 . Physical properties of three container media and their effect on poinsettia growth . Journal of American Society of Soil Science/HortScience Journal , 106 ( 6 ) : 736 – 741 .
- Gan , J. , Yates , S. R. , Spencer , W. F. , Yates , M. V. and Jury , W. A. 1997 . Laboratory-scale measurements simulations of the effect of application methods on soil methyl bromide emission . Journal of Environmental Quality , 26 ( 1 ) : 310 – 317 .
- Gill , P. S. 2000 . Plant Physiology , New Delhi, , India : S. Chand and Company Ltd, Ram Nagar, Rajendra Ravindra Printers (Pvt) Ltd .
- Harper , L. A. , Sharpe , R. R. , Langdale , G. W. and Giddens , J. E. 1987 . Nitrogen cycling in a wheat crop: Soil, plant and aerial nitrogen transport . Agronomy Journal , 79 : 965 – 973 .
- Laimare , F. 1995 . Physical, Chemical and Biological properties of growing media , London, UK : Longman Group Ltd, Lowe and Brydon Printers Ltd .
- Majewski , M. S. , McChesney , M. M. , Woodrow , J. E. , Prueger , J. H. and Seiber , J. N. 1995 . Aerodynamic measurements of methyl bromide volatilization from tarped and nontarped fields . Journal of Environmental Quality , 24 ( 4 ) : 742 – 752 .
- Mazarura , U. . An eco-friendly replacement for methyl bromide in tobacco seedling production in Zimbabwe . 7th Science Symposium . 2004 , Harare, Zimbabwe.
- McMutrey , J. E. 1949 . Hunger signs in crops , Washington, , USA : American Society of Agronomy and the National Fertilizer Association .
- Mengel , K. and Kirkby , E. A. 1987 . Principles of plant nutrition , Bern, , Switzerland : International Potash Institute .
- Miller , R. V. and Donahue , R. L. 1995 . Soils in our Environment , 7th Edition , New Jersey, , USA : Prentice Hall .
- Mullins , G. L. , Reeves , D. W. , Burnmester , C. H. and Bryant , H. H. 1994 . In-row subsoiling and potassium placement effects on root growth and potassium content of cotton . Journal of Agronomy , 86 : 136 – 139 .
- Nelson , D. W. and Sommers , L. E. 1982 . “ Total C, organic C and organic matter ” . In Methods of soil analysis , Edited by: Page , A. L. 539 – 579 . Madison, WI : ASA . Agronomy series No. 9, Part 2
- Noling , J. W. and Becker , J. O. 1994 . The challenge of Research and Extension to define and implement alternatives to methyl bromide . Journal of Nematology , 26 ( 4 Supp ) : 573 – 586 .
- Nyamapfene , K. W. 1991 . Soils of Zimbabwe , Harare, , Zimbabwe : Nehanda Publishers (Pvt) Ltd .
- Otten , W. , Raats , P. A. C. , Baas , R. , Calla , H. and Kabat , P. 1999 . Spatial and temporal dynamics of water in the root environment of potted plants on a flooded bench fertigation system . Netherlands Journal of Agricultural Science , 47 : 51 – 65 .
- Pettigrew , W. T. and Meredith , W. R. 1997 . Dry matter production, nutrient uptake, and growth of cotton as affected by potassium fertilization . Journal of Agronomy , 20 : 531 – 548 .
- Ramsay , M. 1974 . Rhodesian Tobacco , Salisbury, Rhodesia : Department of Conservation and Extension, CONEX .
- Stewart , N. 1986 . Production of pine bark for composts , New York, , USA : McGraw-Hill Book Company .
- Street , J. J. and Kidder , G. 1997 . Fact Sheet: Soils and Plant Nutrition. Soil and Water Department of Extension Services , Gainesville, FL : Institute of Food and Agricultural Sciences, University of Florida .
- TIMB (Tobacco Industrial & Marketing Board) . 2004 . Flue-Cured (Virginia) Annual Statistical Report, Harare, Zimbabwe
- Tisdale , S. L. , Nelson , W. L. and Beaton , J. D. 1985 . Soil fertility and fertilizers. , Fourth Edition , New York : Macmillan .
- Tobacco Research Board Handbook . 2004 . Flue-cured tobacco Recommendations , Harare, , Zimbabwe : Tobacco Research Board .
- Vincent , V. and Thomas , R. G. 1960 . An Agricultural Survey of Southern Rhodesia, Part I Agro-Ecological Survey , Salisbury, Rhodesia : Government Printers .
- Welch , R. M. and Norvell , W. A. 1993 . Growth and nutrient uptake of barley (Hordeum vulgare L. cv Herta). Studies using an N-(2-hdroxyethyl) ethylenedinitrilotriaacetic acid-buffered nutrient solution technique. 1. Role of Zn in the uptake and root leakage of mineral nutrients . Journal of plant physiology , 101 : 627 – 631 .
- Welch , R. M. , Webb , M. J. and Loneragan , J. F. . Zinc in membrane function and its role in P toxicity . Proc. 9th Int. Coll. Plant Nutrition . Edited by: Scaife , A. pp. 710 – 715 . Bucks, UK : Common. Agric. Bureau, Farnham Royal .
- Young , A. 1976 . Tropical Soils and Soil Survey , London, UK : Cambridge University Press .