Class B. Those seeds that will germinate or sprout at an average
temperature of sixty degrees in the shade, or when the apple trees
blossom:

Alfalfa Soy Bean Squash
Cow Pea Pole Bean Cucumber
Corn String Bean Pumpkin
Cotton Melon Tomato
Egg Plant Okra Pepper

We are now ready to answer the question: What conditions are necessary
for seeds to sprout or germinate? These conditions are:

The presence of enough moisture to keep the seed thoroughly soaked.

The presence of fresh air.

The presence of more or less heat.

This teaches us that when we plant seeds in the window box or in the
garden or on the farm we must so prepare the soil and so plant the
seeds that they will be able to obtain sufficient moisture, heat, and
air for sprouting. The moisture must be film water, for if it is free
water or capillary water filling the soil pores, there can be no
ventilation and, therefore, no sprouting.


SEED TESTING

In a previous experiment (page 73) the seeds planted in the wet clay