Alexander A 1986 Foliar Fertilization. Proc. First Int. Symp. Foliar Fertilization, Berlin, March 1985.Developments in Plant and Soil Sciences, Vol. 22. Martinus Nijhoff, Dordrecht. 488 p.
Alexander A and Schroeder M 1987 Modern trends in foliar plant fertilization. J. Plant Nutr. 10, 1391–1399.
Amer F, Rezk A I and Khalid H M 1980 Fertilizer zinc efficiency in flooded calcareous soils. Soil Sci. Soc. Am. J. 44, 1025–1030.
Anderson A J 1970 Trace elements for sheep pastures and fodder crops in Australia. J. Aust. Inst. Agric. Sci. 36, 15–22.
Badillo-Feliciano J and Lugo Lopez M Z 1980 Differential response of corn and sweet potatoes to Zn applications in an Oxisol in northwestern Puerto Rico. Jour Agric Univ Puerto Rico 64, 482–488.
Bansal R L and Nayyar V K 1989 Effect of zinc fertilizers on rice grown on Typic Ustochrepts. IRRN 14, 24.
Basta NT and Tabatabai MA 1992 Effect of cropping systems on adsorption of metals by soils: II. Effect of pH. Soil Sci. 153, 195–204
Bauer A and Lindsay W L 1965 The effect of soil temperature on the availability of indigenous soil zinc. Soil Sci. Soc. Amer Proc. 29, 413–420.
Beeson K C 1957 USDA Year Book Agriculture p. 264
Best E K 1987 Diagnosis and correction of zinc deficiency in Queensland’s wheat soils. Final Report to Wheat Res. Comm. Qld. Wheat Res. Inst., Toowoomba. 27p.
Bhardwaj S P and Prasad S N 1981 Response of rice-wheat rotation to zinc under irrigated conditions in Doon Valley. J. Indian Soc. Soil Sci. 29(2), 220–224.
Boawn L C, Viets F Jr and Crawford C L 1957 Plant utilization of zinc from various types of zinc compounds and fertilizer materials. Soil Sci. 83, 219–229.
Bowman R A and Olsen S R 1982 Effect of calcium sulphate on iron and zinc uptake in Sorghum. Agron. J. 74, 923–925.
Brennan, RF 1991 Effectiveness of zinc sulphate and zinc chelate as foliar sprays in alleviating zinc deficiency of wheat grown on zinc-deficient soils in Western Australia. Aust. J. Exp. Agric. 31, 831–834.
Brown A L and Krantz B A 1966 Sources and placement of zinc and phosphorus for corn (Zea mays L.) Soil Sci Soc Am. Proc. 30, 86–89
Castro R U 1976 Cost-saving methods of ameliorating zinc deficiency in rice. In Proc. Seventh Annu. Meeting Crop Sc. Soc. Philippines, May, 1976, Davao City, Philippines.
Castro R U 1977 Zinc deficiency in Rice. A series of research at the IRRI. IRPS 9, 1–18.
Chandi K S and Takkar P N 1982 Effects of Agricultural cropping systems on micronutrient transformations. 1. Zinc. Plant Soil 69,423–436.
Chandler W H 1937 Botan. Gaz. 98, 625–646.
CIAT 1978 Informe anual. 1977, Cali, Colombia
Clark R B 1982 Plant genotype differences to uptake translocation, accumulation, and use of mineral elements. In Genetic Specificity of Mineral Nutrition of Plants. Ed. MR Saric. pp.41–55. Serbian Acad. Sci. Arts, Sci. Assemb. XIII No. 3, Beograd.
Cottenie A, Kang B T, Kiekens L and Sajjapongse A 1981 Micronutrient status. In Characterization of Soils. Ed. D J Greenland. pp. 149–163. Clarendon, Oxford
Dantas H da S 1971 Manganese cations permutaveis na unidade. Utiga Pesq. Agropec. Bras. Ser. Agron. 6, 27–30.
Donald C M and Prescott J A 1975 Trace elements in Australian crop and pasture production 1924-74. In Trace Elements in soil-plant-animal systems. Eds. D J DNicholas and AR Egan. pp. 7–37. Academic, Sydney.
Duncan O W 1967a Correction of zinc deficiency in wheat on the Darling Downs, Queensland. Qld. J. Agric. Anim. Sci. 24, 287–292.
Duncan O W 1967b Correction of zinc deficiency in linseed on the Darling Downs, Queensland, Qld J. Agric. Anim. Sci. 24, 301–307.
Dutta R K, Muslimuddin and Rahman L 1987 Yield and flowering of rice in relation to fertilizer zinc sulphate. Int. Rice Com. Newsl. 36,16–22.
Egbe N E and Omotoso T I 1972 Nutrient deficiencies of cocoa in Nigeria. Proc 4th Int. Cocoa Res. Conf., Trinidad.
Ellis B G, Davis J F, and Judy W H 1965 Effect of method of incorporation of Zinc in fertilizer on zinc uptake and yield of pea beans (Phaseolus vulgaris). Soil Sci. Soc. Am. Proc. 29, 635–636.
Ellis R Jr, Davis J F, and Thurlow D L 1964 Zinc availability in calcareous Michigan soils as influenced by phosphorus level and temperature. Soil Sci. Soc. Am. Proc. 28, 83–86.
Evans D G and Miller M H 1990 The role of the external mycelial network in the effect of soil disturbance upon vesicular-arbuscular mycorrhizal colonization of maize. New Phytol. 114, 65–71.
Fawusi M O A and Ormrod D P 1975 Zinc nutrition and temperature effects on tomato. J. Hort. Sci. 50, 363–371.
Ferrand M, Bachy A and Ollagnier M 1951 Les oligo elements dans la fumure du palmier a huile au moyen-Congo. Oleagineux 11, 629–636.
Finich A H and Kinnison A F 1933 Arizona Agr. Expt. Sta. Tech. Bull. 47, 407–442.
Galrao E Z 1990 Application of micronutrients and chalk on Soybean yield on varzen soils. R. Bras. Ci Solo. 14, 381–384.
Galrao E Z and de M Felho MV 1981 Effect of sources of zinc on the dry matter production of corn in a Cerrado soil. R. Bras. Ci Solo. 5, 167–170.
Gartrell J W and Glencross R N 1969 Copper, zinc and molybdenum fertiliser for new land crops and pastures-1969. J. Agric. West Aust. (4th Ser.) 9, 517–521.
Gartrell J W 1974 In Our Land 7:12 CSBP and Farmers, Western Australia.
Giordano P M 1977 Efficiency of zinc fertilization for flooded rice. Plant Soil 48, 673–684.
Giordano P M and Mortvedt J J 1973 Zinc sources and methods of application for rice. Agron. J. 65, 51–53.
Glushchenko L T, Dutchenko Z Y and Mishnev A K 1991 Effectiveness of chelates and micronutrients with sunflower. Khim Sel’sk Khoz. 8, 76–77.
Graham R D 1984 Breeding for nutritional characteristics in cereals. Adv. Plant Nutr. 1,57–102.
Greenwood M and Hayfron R J 1951 Iron and zinc deficiencies in cocoa in the Gold Coast. Emp. J. Exp. Agric. 19, 73–86.
Grewel J S and Trehan S P 1979 Micronutrients for potatoes. Fert. News 24(8), 27–30.
Gunderson O, Bezdicek D and MaxGrejor J 1965 Zinc deficiency of corn in Minnesota. Min. Univ. Agr. Ext. Serv., Ext. Bull. 322 April, 1965
Haque I and Kamara C S 1976 Micronutrient investigations in Sierra Leone. FAO/IAEA Coordination meeting on Isotope Aided Micronutrient Studies in Rice Production with Special Reference to Zinc Deficiency. Manilla, Philippines May 17-21.
Hergert G W, Rehm G W and Wiese R A 1984 Field evaluation of zinc sources band applied in ammonium polyphosphate suspension. Soil Sci. Soc. Am. J. 48,1190–1193.
Hodgson J F, Allaway W H and Lockman R B 1971 Regional plant chemistry as a reflection of environment In Environmental Geochemistry on Health and Disease. Eds. H L Cannon and H C Hopps. pp. 57–72. Geol. Soc. Amer. Memoir 123.
Holden E R and Brown J R 1965 Influences of slowly soluble and chelated zinc on zinc content and yield of alfalfa. J. Agr. Food Chem. 13, 180–184.
Igue K and Bornemisza E 1967 El problema del Zn en suelos y plantas de regiones tropicales y de zonas templada. Fitotecnica Latinoamericana. 4, 29–44.
IAEA 1981 Zinc fertilization of flooded rice. IAEA, Tecdoc 242, Vienna, Austria, 80 p.
Iyenger B R V and Raja M E 1988 Response of some vegetable crops to different sources and methods of application of zinc. Indian J. Agric. Sci. 58, 565–567.
Juo A S R and Uzu F O 1977 Liming and nutrient interactions in two ultisols from southern Nigeria. Plant Soil 47, 419–430.
Kang B T and Okoro E G 1976 Response to flooded rice grown on vertisol from north Nigeria to zinc source and methods of application. Plant Soil 44, 15–25.
Kanwar J S and Randhawa N S 1974 Micronutrient Research in Soils and Plants in India (A Review). ICAR Tech. Bull. (Agric.) New Delhi, 185 p.
Karim Z, Miah M M U and Hossain S G 1991 Zinc deficiency problems in flood plain agriculture. Proc. Int. Symp. Role of S, Mg and Micronutrients in Balance Plant Nutr. Ed. S. Portch. pp. 337–343. Chengdu PRC.
Katyal J C and Friesen D K 1988 Deficiencies of micronutrients and sulfur in wheat. In Wheat Production Constraints in Tropical Environments. Ed. A.R. Klatt. pp. 99–129. CIMMYT, D.F. Mexico.
Katyal J C and Ponnamperuma F N 1974 Zinc deficiency. A widespread nutritional disorder of rice in Agusan del Norte. J Philipp. Agric. 58(3,4) 79–89.
Katyal J C and Sharma B D 1979 Role of micronutrients in crop production-a review. Fert. News 24, 33–50.
Kayode G and Agboola A A 1983 Investigations on the use of macro-and micronutrients to improve maize yield in South Western Nigeria. Fert. Res. 4, 211–221.
Larez C and Sanchez C 1971 Respuesta del sorgo (Sorghum vulgare Pers.) a la application de cal y micronutrientos en un suelo ultisol de sabana. Oriente Agropecuario 3, 16–23.
Leslie J K, Whitehouse M J and Mackenzie J 1973 Zinc fertilizer residual experiment. Qld. Wheat Res. Inst. Annu. Rep. 1972-73, pp. 33–35.
Lingle J C and Holmberg D M 1957 The response of sweet corn to foliar and soil zinc application on a zinc deficient soil. Proc. Amer. Soc. Hort. Sci. 70, 308–315.
Littlemore J, Winston EC, Howitt CJ, O’Farrell P, and Wiffen DC 1991 Improved methods for zinc and boron application to mango (Mangifera indica L.) cv. Kensington Pride in the Mareeba-Dimbulah district of North Queensland. Aust. J. Exp. Agric. 31, 117–121.
Li-shu-fan, Liang Hong, Li Yu-ying and Zang Dong-tie 1991 The effect of sulphur and micronutrients (zinc, copper and iron) on the balance of crop nutrition. Proc. Int. Symp. Role of S, Mg and Micronutrients in Balanced Plant Nutr. Ed. S Porten. pp. 216–221. Chengdu, PRC.
Liu Zheng 1991 Characterization of content and distribution of micronutrients in soils of China. Proc. Int. Symp. Role of S, Mg and Micronutrients in Balance Plant Nutr. Ed. S. Porten, pp. 54-62. Chendu, PRC.
Lucas RE and Knezek BD 1972 Climatic and soil conditions promoting micronutrient deficiencies in plants In Micronutrient in Agriculture. Eds. JJ Mortvedt and W L Lindsay. pp. 265–287. Soil Sci. Soc. Am., Madison.
Macnaeidhe F, Fleming GA and Parle PJ 1986 Zinc deficiency, first time in cereals in Ireland. Farm and Food Res. pp. 57–58.
MacNaeidhe FS and Fleming GA 1988. A response in Spring cereals to foliar sprays of zinc in Ireland. Irish J. Agric. Res. 27, 91–97.
Maftoun M and Karimian N 1989 Relative efficiency of two zinc sources for maize (Zea mays L.) in two calcareous soils from an arid area of Iran. Agronomie 9(8), 771–775.
Magar and Babakir 1965 Review of the work done on micronutrients in the clay plain of the Republic of the Sudan. Int. Symp. on Maintenance and Improvement of Soil Fertility, Khartoum. OAU/STRC Publications Bureau, Watergate House, York Bldg, London.
Malavolta E H P, Mell F A F and Brasil Sobro M O C 1962 On the Mineral nutrition of some tropical crops. Int. Potash Inst., Berne, Switzerland.
Mandal B, Chatterjee J, Hazra GC, and Mandal LN 1992 Effect of preflooding on transformation of applied zinc and its uptake by rice in lateritic soils. Soil Sci. 153, 250–257.
Mann M S, Takkar P N, Bansal R L and Randhawa N S 1978 Micronutrient status of soil and yield of maize and wheat as influenced by micronutrient and farmyard manure application. J. Indian Soc. Soil Sci. 26, 203–214.
Marinho M L and Igue K 1972 Factors affecting zinc absorption by corn from volcanic ash soils. Agron. J. 64, 3–8.
Marschner H and Cakmak I 1989 High light intensity enhances chlorosis and necrosis in leaves of zinc, potassium and magnesium deficient bean (Phaseolus vulgaris) plants. J. Plant Physiol. 134, 308–315.
Mikkelsen D S and Shiou K 1977 Zinc fertilization and behaviour in flooded soils. Spec. Publ. No. 5, Comm. Agric. Bur., Farnham Royal. 59 p.
Moraghan JT 1980 Effect of soil temperature on response of flax to phosphorus and zinc fertilizers. Soil Sci. 129, 290–296.
Mordvedt J J 1991 Research techniques with micronutrient fertilizers for use in efficient crop production. Proc. Int. Symp. on Role of S, Mg and micronutrients in balanced plant nutrition. Ed. S. Porten. pp. 30–39. Chengdu, PRC.
Murphy L S and Walsh L M 1972 Correction of micronutrient deficiencies with fertilizers. In Micronutrients in Agriculture. Eds. J J Mortvedt, P M Giordano and W L Lindsay. pp. 347–387. Soil Sci. Soc. Amer., Madison USA.
Myhr K 1988 Zinc and manganese fertilization of barley on alkaline soil. Norsk Landbruks Forsking 2, 103–109.
Nambiar E K S 1975 Mobility and plant uptake of micro-nutrients in relation to soil water content. In Trace Elements in Soil-Plant-Animal Systems. Eds. D J D Nicholas and AD Egan. pp. 151-163. Academic, London.
Nayyar V K, Singh S P and Takkar P N 1984 Response of sugarcane to zinc and iron sources. J. Res., Punjab Agricultural Univ. 21, 134-136.
Nayyar V K and Takkar P N 1980 Evaluation of various zinc sources for rice grown on alkali soil. Z. Pflanzan. Bodenk. 143, 489–493.
Nayyar V K, Takkar P N, Bansal R L, Singh S P, Kaur N P and Sadana U S 1990 Micronutrients in Soil and Crops of Punjab. Dept. Soil. Res. Bull. 148 p.
Nene Y L 1966 Symptoms, cause and control of Khaira disease of paddy. Bull. Indian Phytopathol. Soc. No. 3,97–101.
Olsen S R and Watanabe F S 1979 Interaction of added gypsum in alkaline soils with uptake of iron, molybdenum, manganese, and zinc by sorghum. Soil Sci. Soc. Amer. J. 43, 125–130.
Ozanne P G 1955 The effect of light on Zn deficiency in subterranean clover. Aust. J. Biol. Sci. 8, 344–355.
Pathak A N, Tiwari K N, Upadhaya R L and Jha A K 1979 Zinc response of barley as influenced by genetic variability. Indian J. Agric. Sci. 49, 25–29.
Peralta F, Bornemisza E and Alvarado A 1981 Zinc adsorption by Andepts from the central plateau of Costa Rica. Commun. Soil Sci. Plant Anal., 12, 669–682.
Pittman H A and Owen R C 1936 Anthracnose and mottle leaf of citrus in Western Australia. J Dept. Agric. West Aust. 13, 137–143.
Ponnamperuma G N 1982 Genotypic adaptability as a substitute for amendments on toxic and nutrient deficient soils. Proc. 9th Int. Plant Nut. Colloq. Warwick, England (August 1982) 467 pp.
Ponomarev V G and Ponomareva T G 1989 Effectiveness of zinc fertilizers on cotton in relation to rates, times and modes of application. Agrokhimiya 5, 90–93.
Prasad B and Sinha M K 1981 The relative efficiency of zinc carriers on growth and zinc nutrition of corn. Plant Soil 62, 45–52.
Randhawa N S and Takkar P N 1975 Micronutrient research in India. The present status and future projection. Fert. News. 20, 11–18.
Rasmussen P E and Boawn L C 1969 Zinc seed treatment as a source of zinc for beans (Phaseolus vulgaris) Agron. J. 61, 674–676.
Reddy C N and Patrick W H Jr 1977 Effect of redox potential on the stability of zinc and copper chelates in flooded soils. Soil Sci. Soc. Amer. J. 41, 729–732.
Riceman D S 1948 Mineral deficiency in plants on the soils of the Ninety-mile plain in South Australia. 5. Effect of growth and removal of a crop treated with zinc and copper upon pasture established subsequently on Laffer sand, near Keith. J. Coun. Sci. Ind. Res. Aust. 21, 229–235.
Rose I A, Felton W L and Banks L W 1981 Responses of four soybean varieties to foliar zinc fertilizer. Aust. J. Exp. Agric. Anim. Husb. 21, 236–240.
Ryan P, Lee J and Peebles T F 1967 FAO U N, World Soil Resources Report 31, Rome 1967.
Sadana U S and Takkar P N 1983 Methods of Zinc application to rice on sodic soil. IRRN, 8,21–22.
Sadana U S and Takkar P N 1984 Soil amendments for sodic conditions. IRRN, 9, 10–11.
Sajwan K S and Lindsay W L 1988 Effect of redox, zinc fertilization and incubation time on DTPA-extractable zinc, iron and manganese. Commun. Soil Sci. Plant Anal. 19, 1–11.
Sakal R, Singh A P and Singh B P 1985 Direct and residual effect of zinc and zinc amended organic manures on the zinc nutrition of field crops. Indian J. Agric. Res. 19, 93–97.
Sanchez P A 1977 Manjo de suelos Tropicales en la Amazonia Sudamericana In Soc. Colombiane de la Ciencia de Suelo (ed) Memorias del V Congreso Latinoamericao de la Ciencia del Suelo Y IV Coloquio Nacioonal sobre suelos. Suelos Ecuatorials VIII (1), 1–11.
Sanchez P A and Cochrane T T 1980 Soil constraints in relation to major farming systems in tropical America. In Soil Related Constraints to Food Production in the Tropics, pp. 109–139. IRRI, Philippines.
Schwartz S M, Welch R M, Grunes D L, Cary E E, Norvell W A, Gilbert M D, Meredith M P and Sanchirico C A 1987 Effect of zinc, phosphorus, and root-zone temperature on nutrient uptake by barley. Soil Sci. Soc. Amer.J. 51, 372–375.
Scott J M 1989 Seed coatings and treatments and their effects on plant establishment. Adv. Agron. 42, 43–83.
Sedberry J E Jr, Peterson F J, Wilson E, Nugent A L, Engler R M and Brapbackor R H 1971 Effects of zinc and other elements on the yield of rice and nutrient content of rice plants. Louisiana Agr. Exp. Sta. Bull. 653.
Servetuik-chaluya G K, Verigina V S, Kornienko V A, Orlov V K Urbisinov Zh K, Kalashmikow I V and Mamutov Z 1991 Hygienic assessment of rice cultivated with the use of zinc salts. Gig. Sanit 5, 42–44.
Sharma B D, Takkar P N and Sadana U S 1982 Evaluation of levels and methods of zinc application to rice in sodic soils. Fert. Res. 3, 161–167.
Sheudzhen A Kh, Bugaevskii V K and Doseeva 0 A 1991 Effect of zinc fertilization on rice yield. Khim Sel’sk. Khoz. 1, 93–94.
Shiratori K 1977 Proc. Int. Seminar Soil Environ. Fertil. Management Intensive Agric. (SEFMIA) pp. 653–659. Tokyo, Japan.
Shulka U C and Mukhi A K 1980 Ameliorative role of Zn, K, and gypsum on maize growth under alkali soil conditions. Agron. J. 72, 85–88.
Shukla U C and Raj H 1974 Influence of genetic variability on zinc response in wheat. Soil Sci. Soc. Amer. Proc. 38, 477– 479.
Singh M V and Abrol I P 1985 Direct and residual effect of fertilizer zinc application on the yield and chemical composition of rice-wheat crops in an alkali soil. Fert. Res. 8, 179–191.
Singh M V and Abrol I P 1986 Transformation and movement of zinc in an alkali soil and their influence on the yield and uptake of zinc by rice and wheat crops. Plant Soil 94, 445–449.
Stiles W 1961 Trace Elements in Plants. Cambridge Univ Press Third Edition Cambridge, England.
SSSA (Soil Sci. Soc. Am.) Soil Testing Committee 1965 A survey of micronutrient deficiencies in the USA and means of correcting them. Madison, Wisc.
Stephens C G and Donald C M 1958 Australian soils and their responses to fertilizers. Adv. Agron. 10, 167–.
Stratieva S, Sedlarska B and Stoyanov D 1990 Effect of zinc and boron on sugarbeet growth on a leached smonitza chernozem soil. Pochvoznanie i Agrokhimiya 25, 9–14.
Takkar P N 1991a Requirement and response of cultivars to micronutrients in India. Proc. 4th Int. Symp. Genetic Aspects of Plant Mineral Nutrition. Ed Randal, 1991. Plant and Soil (In Press).
Takkar P N 1991b Zinc Deficiency in Indian Soils and Crops In Zinc in Crop Nutrition. pp. 55–64. Int. Lead Zinc Research Organization, Inc. and Indian Lead Zinc Information Centre, New Delhi.
Takkar P N and Bansal R L 1987 Evaluation of rates, methods and sources of zinc application to wheat. Acta Agronomica, 36, 277–283.
Takkar P N, Chibba I M and Mehta S K 1989 Twenty Years of Coordinated Research of Micronutrients in Soil and Plants (1967-87). Indian Institute of Soil Science, Bhopal. IISS, Bull. I, 314 p.
Takkar P N, Mann M S and Randhawa N S 1974 Methods and time of zinc application. J. Res. Punjab Agric. University 11, 276–283.
Takkar P N, Mann M S and Randhawa N S 1975 Effect of direct and residual available zinc on yield, zinc concentration and its uptake by wheat and groundnut crops. J. Indian Soc. Soil Sci. 23, 91–95.
Takkar P N and Nayyar V K 1981 Effect of gypsum and zinc on rice nutrition on sodic soils. Exptl. Agric. 17, 49–55.
Takkar P N and Randhawa N S 1978 Micronutrients in Indian Agriculture (Review). Fert.News 23,5–26.
Takkar P N and Sidhu B S 1979 Kinetics of zinc transformations in submerged alkaline soils in the rice growing tracts of Punjab. J. Agric. Sci. Camb. 93, 4451–447.
Takkar P N and Singh M 1979 Methods of application of micronutrient carriers-soil versus foliar application. India/FAO/Norway Seminar on Micronutrients in Agriculture, New Delhi. Sept., 1979.
Takkar P N, Singh S P, Bansal R L and Nayyar V K 1983 Tolerance of barley varieties to zinc deficiency. Indian J. Agric. Sci. 53, 971–972.
Takkar P N and Singh T 1978 Zinc nutrition of rice (Oryza sativa) as influenced by rates of gypsum and zinc fertilization of alkali soils. Agron. J. 70, 447–450.
Tanner P D and Grant P M 1974 The effectiveness of N, P and K fertilizer and lime as carriers of zinc for maize (Zea mays L.) under field conditions. Rhod. J. Agric. Sci. 12, 163–168.
Thorne W 1957 Zinc deficiency and its control. Adv. Agron. 9, 31–65.
Velly J, Celton J and Marquette J 1974 Experimentation sur les oligo-elements en culture seche et en riziere a Madagascar. Comm Reunion d’Agron IRAT, Paris, 26.
Walsh I and Schulte E E 1970 Computer programmed soil test recommendations for field and vegetable crops. Wisconsin Agr. Exp. Sta. Soil Fertility Series Bull. 5.
Welch C D, Gray C, Thomas G W and Anderson W A 1967 Zinc deficiency and fertilization. Texas A and M Univ. Agr. Ext. Serv. Fact Sheet 1-721.
Whitney D A and Murphy L S 1969 Kansas lime and fertilizer recommendations. Kansas Agr. Ext. Circ. 352.
Widdowson J P 1966 Zinc deficiency in the shallow soils of New Zealand J. Agr. Res. 9,44.
Wier R G and Holland J 1980 The residual effects of fertilizer zinc on a black earth from north western New South Wales. Proc. Aust. Agron. Conf., Qld. Agric. Coll., Lawes p.310.
Williams C H and Andrew C S 1970. In Australian Grasslands. Ed. RM Moore. p. 321. Australian National Univ. Press, Canberra.
Yoshida S, Ann J S and Forno D A 1973 Occurrence, diagnosis, and correction of zinc deficiency of lowland rice. Soil Sci. Plant Nutr. 19, 83–93.
Yoshida S, Mclean G W, Shafi M and Mueller K E 1970 Effects of different methods of zinc applications on growth and yields of rice in a calcareous soil, West Pakistan. Soil Sci. Plant Nutr. 16, 147–149.
Yoshida S and Tanaka A 1969 Zinc deficiency of the rice plant in calcareous soils. Soil Sci. Plant Nutr. 15, 75–80.