Assertion: fertilizer's amount | /r/HasProperty | determined the plant
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Source sentences:
text: The assumptions underlying this philosophy are that the soil does contribute nutrition to the crop (often significant in the case of P, Ca, Mg, S, micronutrients, and sometimes K); the soil's contribution can be measured by a calibrated soil test; and the nutritional amount not supplied by the soil can be determined and added to fertilize the plant.