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GROWING RADISHES AND BEANS - DIFFERENT WATERING We are going to grow radishes and lima beans in pots of soil, with different amounts of water in each pot. Ask an adult to cut five one-quart milk cartons in half so that they will be only half as tall as they were. Put potting soil into six little pots, and put each of five pots into the milk carton bottoms. One pot will not be in a milk carton. With a color crayon, put a number on each milk carton, and write "6" onto the pot that is not in a milk carton. Make a list of the carton numbers, so that you can write down the way each pot will be watered. With your finger, make four little holes, one-half inch deep, in the soil in each of your pots. Put two radish seeds and two lima bean seeds, each into one hole, in each of your pots. You will have twelve lima bean seeds and twelve radish seeds altogether. The pot in carton # 1 will not get any water at all. Ask an adult to help you put one ounce of water into carton # 2, and put two ounces of water into carton # 3. Put three ounces of water into Carton # 4. After you make sure that carton # 5 is a little taller than the pot, fill it with water so that the pot is all the way under water. Cover each carton with plastic wrap (or plastic sandwich bags) and stretch a rubber band around the cartons to hold the plastic covers in place. The plastic covers will keep the water inside the cartons, and you will not have to water these plants during the experiment. Do not cover the pot which is not in a carton. This plant is to be Watered in the regular way, by gently putting in a little water when the soil is dry on top. Set this pot into a little saucer so it won't drip when you water it. Put all the cartons, and pot # 6 (the one not in a milk carton bottom), in a sunny window, or, if it's warm outside, put them outside where the sun can peek into the cartons to give the plants some light. Watch the seeds grow little stems and leaves, and make notes on your list so you can see if some are taller than the others. See if you can tell if the plants grow best without water, or with water. If the ones that have water grow better, then see if you can tell which amount of water is best. Watch and see if # 6 grows the same as the covered plants. As the plants grow, write on your list, so that you can tell which way is best. Talk about your plants, and learn what the plants need so they can grow nicely. See if you can find out why too much water is bad for them, and why it is also bad if you don't give them enough water. Any problems with this page? Send URL to
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