If you have trouble getting other green beans to germinate in early May because of cold soil, try planting a patch of scarlet runner beans first before your pole and bush green beans.
This article describes how to determine vineyard nutrient needs through grapevine tissue and soil sampling. It also provides tissue testing guidelines.
The plants in the field trials were chosen by an advisory group of nursery growers and landscape designers and were evaluated on growth, visual appeal, timing of flowering, density of flowers, physiology and heat tolerance.