"Gardens should be made to look nice, as well as be made free from weeds just because it is a good thing for the plants," went on Daddy Blake. "A good gardener takes pride in his garden. He wants to see every weed cut down. Besides, hoeing around your corn and beans makes the dirt nice and finely pulverized—like the pulverized sugar with which Mother makes icing for the cakes. And the finer the dirt is around the roots of a plant the more moisture it will hold and the better it will be for whatever is growing, as I have told you before."
"Well, we'll hoe a little bit," said Hal.
He and his sister got their hoes and soon they were so interested in cutting down the weeds in between the rows that they forgot about going off to play. Hal noticed that the ears of corn on his stalks were getting larger inside the green husk that kept the soft and tender kernels from being broken, as might have happened if they were out in the air, as tomatoes grow.
And so the gardens grew, just as did that of "Mistress Mary, quite contrary," about whom you may read in Mother Goose, or some book like that. Sometimes it rained and again it was quite dry, with a hot sun beating down out of the blue sky.
"If we don't get rain pretty soon we shall have to water the gardens," said Daddy Blake one night after about a week of very dry weather. Around the roots of the many plants the earth was caked and hard, so that very little air could get down to nourish the growing things.
"What do people do who have gardens where it doesn't rain as often as it does here, Daddy?" asked Mab.
"Well in very dry countries, such as some parts of ours near the places called deserts," said Mr. Blake, "men build large dams, and hold the water back in big ponds or lakes so it will last from one rainy season to another. The water is let run from the lake through little ditches, or pipes, so that the thirsty plants may drink. This is called the irrigation method, for to irrigate means to wet, soak or moisten with water. Each farmer or gardener is allowed to buy as much water as he needs, opening little gates at the ends of the main ditches or sluices, and letting the water run over his dry ground, in which he has dug furrows to lead the water where he most needs it.
"And sometimes, when there is too little water to use much of it this way, the gardeners do what they call intensive cultivation. Those are big words, but they mean that the man just hoes his ground every day around his plants, instead of perhaps once a week.
"You know there is moisture in the air, and at night dew falls. This wets the ground a little, and by digging and turning over the earth around the roots of his plants, the gardener makes it very fine so it holds the moisture longer. In this way a little bit of rain, or dew, lasts a long time. Come out now, and I'll show you something you perhaps have not noticed."
Daddy took Hal and Mab to the garden, and with a hoe he pointed to a place around Hal's corn stalks where the dry ground was hard, and baked by the sun.