Phosphorus uptake role of public investment and capital formation in indian agriculture pigeon pea and its role in cropping systems of the Indian subcontinent. Does the Pi strip method allow assessment of the available soil P?

Experiences with soft rock phosphate for direct fertilizer application. Seminar on phosphate rock for direct application, pp. Characterization of soil phosphorus by anion exchange resin adsorption and P-32 equilibration. Statistics yearbook of the fertilizer sector. Sao Paulo, Brazil, ANDA -National Association for Fertilizer Diffusion. Phosphate rock dissolution in soil: indications from plant growth studies.

Application of the Kirk and Nye phosphate rock dissolution model. Cowpea varietal differences in uptake of phosphorus from Gafsa phosphate rock in a low P ultisol. Local phosphate resources for sustainable development in sub-Saharan Africa. Keyworth, Nottingham, UK, National Environment Research Council, British Geological Survey and DFID. Effect of previous crops on arbuscular mycorrhizal formation and growth of succeeding maize.

Factors affecting rate of oxidation in soils of elemental sulphur and that added in rock phosphate-sulphur fusions. Phosphate solubility test -interference of some accessory minerals. Economic evaluation of the use of phosphate fertilizers as a capital investment. Nutrient management for sustainable agriculture in Asia, pp.

An analysis of the potential demand for phosphate fertilizers: sources of change and projections to 2025. Long-term nutrient needs for New Zealand’s primary industries: global supply, production requirements and environmental constraints, pp. Palmerston North, New Zealand, Fertilizer and Lime Research Centre, Massey University. The effect of phosphate buffering capacity and other soil properties on North Carolina phosphate rock dissolution, availability of dissolved phosphorus and relative agronomic effectiveness. Promotion and evaluation of Tilemsi phosphate rock in Mali agriculture. Use of phosphate rock for sustainable agriculture in West Africa, p.

New York, USA, Marcel Dekker Inc. Transformation of rock phosphate during composting and the effect of humic acid. Interactions between phosphate solubilising bacteria and VA mycorrhiza to improve plant utilization of rock phosphate in non-acidic soils. 3rd international congress on phosphorus compounds, pp.

Rhizobium to improve the agronomic efficiency of rock phosphate for legume crops. Availability of North Carolina rock phosphate applied to soils. Fertilizer value of partially acidulated Purulia rock phosphate. Comparison of five soil-testing methods to establish phosphorus sufficiency levels in soil fertilized with water-soluble and sparingly soluble phosphorus sources. La filière phosphate: du mineral à l’engrais, principaux points de repère. An evaluation of plant-borne factors promoting the solubilization of alkaline rock phosphates. Las rocas fosforicas y su posibilidad de uso agricola en Chile.

Santiago, Instituto Nacional de Investigaciones Agricolas, Ministerio de Agricultura. Arbuscular mycorrhizal fungi: more diverse than meets the eye, and the ecological tale of why. The bioconversion of Tunisian phosphorite using Aspergillus niger. Dissolution of phosphate rocks in soils.

Effect of pH on the dissolution and plant availability of phosphate rock in soil with pH dependent charge. Effects of vesicular-arbuscular mycorrhiza on the availability of iron phosphates to plants. A review of the use of phosphate rocks as fertilizers for direct application in Australia and New Zealand. 1987 Single superphosphate-reactive phosphate rock mixtures.