Healthy plant growth and reproduction require 17 nutrients. Of these, carbon (C), oxygen (O), and hydrogen (H) are derived mainly from the atmosphere and water. Soil minerals and/or soil organic ...

DURING recent years one of the most important advances in relation to the growth of field crops has been the recognition of the important part played by minute traces of elements other than those ...

MUCH attention has been given during the present century to the effect of mineral deficiencies on plant growth, and more recently it has become apparent that the presence of minute traces of new ...