Abelson P H 1999 A potential phosphate crisis. Science 283, 2015 pp.CrossRefPubMed
Adam F 1974 Soil Solution. InPlant root and it's environment. Ed. Carlson E W. University Press of Verginia, Charlottsville.
Bates T R and Lynch J P 1996 Stimulation of root hair elongation in Arabidopsis thalianaby low phosphorus availability. Plant Cell Environ. 19, 529-538.
Bates T R and Lynch J P 2000 The efficiency of Arabidopsis thaliana
) root hairs in phosphorus acquisition. Am. J. Bot. 87, 964-970.PubMed
Barraclough P B 1986 The growth and activity of winter wheat roots in the field: nutrient inflows of high-yielding crops. J. Agric. Sci. Cambridge 106, 53-59.
Bolland M D A 1994 Residual value of superphosphate for oat and barley grown on a very sandy phosphorus leaching soil. Fertil. Res. 38, 171-181.
Clarkson D T 1996 Root structure and sites of ion uptake. InPlant Roots: The Hidden Half. Eds. Y Waisel, A Eshel, U Kafkafi. Marcel Dekker, Inc. New York, Basel, Hongkong. pp. 483-510.
Egle K, Manske G, Römer W and Vlek P L G 1999 Improved phosphorus efficiency of three new wheat genotypes from CIMMYT in comparison with an older Maxican variety. J. Plant. Nutr. Soil Sci. 162, 353-358.CrossRef
Ewens M and Leigh R 1985 The effect of nutrient solution composition on the length of root hairs of wheat. J. Exp. Bot. 36, 713-742.
Föhse D and Jungk A 1983 Influence of phosphate and nitrate supply on root hair formation of rape, spinach and tomato plants. Plant Soil 74, 359-368.
Föhse D, Claassen N and Jungk A 1991 Phosphorus efficiency of plants. Significance of root radius, root hairs and cation-anion balance for phosphorus influx in seven plant species. Plant Soil 132, 261-272.
Gahoonia T S and Nielsen N E 1992 Control of pH at soil-root interface. Plant Soil 140, 49-54.
Gahoonia T S, Nielsen N E 1997 Variation in root hairs of barley cultivars doubled phosphorus uptake from soil. Euphytica 98, 177-182.CrossRef
Gahoonia T S, Care D and Nielsen N E 1997 Root hairs and acquisition of phosphorus by wheat and barley cultivars. Plant Soil 191, 181-188.CrossRef
Gahoonia T S and Nielsen N E 1998 Direct evidence on participation of root hairs in Phosphorus (32P) uptake from soil. Plant Soil 198, 147-152.CrossRef
Gahoonia T S, Nielsen N E and Lyshede O B 1999 Phosphorus acquisition of cereal cultivars in the field at three levels of P fertilization. Plant Soil 211, 269-281.CrossRef
Gahoonia T S, Nielsen N E, Joshi P A and Jahoor A 2001 A root hairless barley mutant for elucidating genetics of root hairs and phosphorus uptake. Plant Soil 235, 211-219.CrossRef
Gahoonia T S and Nielsen N E 2003 Phosphorus (P) uptake and growth of root hairless barley mutant (bald root barley, brb) and wild type in low-and high-P soils. Plant Cell Environ. (in press) Gauch H G and Zobel R W 1996 Optimal replication in selection experiments. Crop Sci. 36, 838-843.
Greef J M and Kullmann A 1992 Effect of nitrate application on shoot and root growth of wheat seedlings. (Triticum aestivumL). Z. Acker Pflanzenbau 169, 104-113.
Hetrick B A D 1991 Mycorrhizas and root architecture. Experientia 47, 355-362.
Hoad S P, Russell G, Lucas M E and Bingham I J 2001 The management of wheat, barley and oat root systems. Adv. Agron. 74, 193-246.
John M J and Wahbi A 1992 Site-factor influence on barley response to fertilisers in on-farm trials in northern Syria. Descriptive and predictive models. Experi. Agri. 28, 63-87.
Leon J and Schwang K U 1992 Description and application of a screening method to determine root morphology traits of cereals cultivars. Z. Acker. Pflanzenbau 169, 128-134.
Lynch J P 1995 Root architecture and Plant productivity. Plant physiology 109, 7-13.PubMed
Marschner H and Römheld V 1983 In vivomeasurement of rootinduced changes at the soil-root interface: effect of plant species and nitrogen source. Z. Pflanzenphysiol. 111, 241-251.
Murphy J and Riley J P 1962 A modified single solution method for determination of phosphate in natural waters. Analytica Chimica Acta 27, 31-36.CrossRef
Narang R A, Bruene A and Altmann T 2000 Analysis of phosphate acquisition efficiency in different Arabidopsis accessions. Plant Physiol. 124, 1786-1799.PubMed
Olsen S R Watanabe F S and Bowman R A 1983 Evaluation of fertilizer phosphate residues by plant uptake and extractable phosphorus. Soil Sci. Soc. Am. J. 47, 952-958.
Raghothama K G 1999 Phosphorus Acquisition. Annu. Rev. Plant Physiol. 50, 665-693.CrossRef
Reuter D J, Dyson C B, Elliott D E, Lewis D C and Rudd C L 1995 An appraisal of soil phosphorus testing data for crops and pastures in south Australia. Austr. J. Exper. Agri. 35, 979-995.
Rodriguez D, Pomar M C Goudriaan J 1998 Leaf primordia, initiation and leaf emergence and tillering in wheat (Triticum aestivum
L) grown under low phosphorus conditions. Plant Soil 202, 149-157.CrossRef
Röhm M and Werner D 1987 Isolation of root hairs from seedlings of Pisum sativum. Identification of root hair specific proteins by in situlabelling. Physiol. Plant. 69, 129-136.
Sanchez P A, Leakey R R B 1997 Land use transformation in Africa: three determinants for balancing food security with natural resources utilization. Eur. J. Agron. 7, 15-23.CrossRef
SAS Institute Inc. 1989 SAS/STAT. User Guide. Version 5. SAS Institute Inc., Cary, NC, USA.
Smulalski M and Oberauf S 1990 Root-growth of winter wheat under field conditions. Arch. Acker pflanzenbau Bodenkd. 34, 781-789.
Tilman D, Cassman K G, Matson P A, Naylor R and Polasky S 2002 Agricultural sustainability and intensive production practices. Nature 418, 671-677.CrossRefPubMed
Yan X L, Lynch J, Beebe S 1995 Genetic variation for phosphorus efficiency of common bean in contrasting soil types. I. Vegetative response. Crop Sci. 35, 1086-1093.