Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools elementaryprinci02ferg Year: 1913 312 Elementary Principles of Agriculture 449. Green Manuring. (See ^ 131). Prof. Shaw of the Cahfornia Experiment Station, reports the following results which show the possibilities of deep plowing, and a single green manur- ing on sandy soils naturally lacking in the qualities that humus gives. First a number of plots were summer fallowed, and in the fall plowed to a depth of 6 inches, harrowed and seeded as indicated in the table, except No. 1, wh
Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools elementaryprinci02ferg Year: 1913 312 Elementary Principles of Agriculture 449. Green Manuring. (See ^ 131). Prof. Shaw of the Cahfornia Experiment Station, reports the following results which show the possibilities of deep plowing, and a single green manur- ing on sandy soils naturally lacking in the qualities that humus gives. First a number of plots were summer fallowed, and in the fall plowed to a depth of 6 inches, harrowed and seeded as indicated in the table, except No. 1, which was so^vn to wheat continuously and only double disced after each harvest. The other plots were deeply plowed after each harvest and sum- mer fallowed. Com- pare Figs. 199, 200 and 201. Also H 143. Yield of Wheat Under Different Soil Treatments Fig. 201. Wheat plants from six plots treated differently, showing comparative develop- ment: 1, plot eontinuously seeded to wheat; 2, barefallowed; 3, horse beans grown and plowed under after previous crop; 4, Can- adian field peas grown and plowed under; 5, rye and vetch grown and plowed under; 6, rye grown and plowed under. Crop Grown and Treatment Given in First Year Yield per Acre 2d Year 3d Year Average 2 Years 1. Wheat after wheat double disced. ,26 bu. 2 Bare fallow 28. 3. Horse beans, (turned under) Hght 4. Canadian field peas (turned under).. light 5. Rye and Vetch (turned under) heavy 6. Rye (turned under) heavy 54.
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