2.4 Soil Samples Samples of rhizosphere soil were collected by gently shaking off from the root system; available Zn extracted by DTPA according to the method of [29] and determined using ICP-MS (Agilent 7500a, USA)
2.4 Soil SamplesSamples of rhizosphere soil were collected bygently shaking off from the root system; availableZn extracted by DTPA according to the methodof [29] and determined using ICP-MS (Agilent7500a, USA)