Teachers' manual of elementary agriculture, nature study, and domestic science . miths Alfalfa Musts and Dont*. 17. Uses and value of alfalfa to the farm and the farmer. 18. Research work — test of viability and purity of seed used inneighborhood. Determine different leaf and stem types in a givenarea of a field of alfalfa three or more years old. Determine averagenumber of stems on crowns one year old ; two years old ; three yearsold; four years old; five years old. Can a crown be found in thedistrict with three hundred or more stems? Find length of rootunder normal conditions of one-year-old
Teachers' manual of elementary agriculture, nature study, and domestic science . miths Alfalfa Musts and Dont*. 17. Uses and value of alfalfa to the farm and the farmer. 18. Research work — test of viability and purity of seed used inneighborhood. Determine different leaf and stem types in a givenarea of a field of alfalfa three or more years old. Determine averagenumber of stems on crowns one year old ; two years old ; three yearsold; four years old; five years old. Can a crown be found in thedistrict with three hundred or more stems? Find length of rootunder normal conditions of one-year-old plant, two-year-old plant,three-year-old plant. Determine what is now being done by plantbreeders to improve this plant. Are honeybees desirable in alfalfafields ? 16 ELEMENTARY AGRICULTURE Crop Rotation. The preceding lessons on field crops willsuggest a general plan for studying all crops of special inter-est to the school. It is very important to call attention torotation of crops, and a brief outline is here given to heused after work on the special crops is The Results when Education is aitlied to Farming Outline 1. Reasons for crop rotation. _. 1 Manning a rotation. :i. Choice of crops and rotation. a. Things which must be considered. (1) Adaptation to locality.(_) Yield or producing power. (3) Quality. (4) Market condition for crop grown. All plans for farm rotations should include some feed crops whichcan be fed upon the farm to some form of live stock, and the barnyardcompost hauled back to the fields to renew the stock of plant food. b. All rotations should have at least one legume crop. Why? c. All rotations should have at least one cash or money crop. FIELD CROPS 77 4. Length of rotation. «. Differs with size of farm. b. Differs with kind of farming practiced. 5. Plan a practical rotation for the home farm and bring into classfor general discussion. In all this work let the idea prevail that a rotation mustkeep up soil fertility and at the same time
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