Chickpea ( Cicer arietinum ) is known to secrete organic anions. We investigated its effectiveness in obtaining P over a range of pH values. Methods We grew two cultivars of chickpea, supplied with either ammonium or nitrate nitrogen, at 10 levels of applied P, and at four initial pH values. We measured plant weight, P concentration in the tops, and rhizosphere pH. We compared the results with those previously obtained for luc...