Advances in agronomy volume 05

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Ngày đăng: 08/05/2019, 14:34

... winter wheat was heavy in 1912 and 1928, largely because of winterkilling in Ohio, Indiana, and Illinois ; in 1917, because of winterkilling in Nebraska and Kansas; an d in 1925, because of winterkilling... freezing during the winter or early spring He mentions winterkilling specifically as having been recorded in nineteen of the forty-five years between 1855 and 1900 It certainly has not occurred in. . .ADVANCES IN AGRONOMY VOLUME V This Page Intentionally Left Blank ADVANCES IN AGRONOMY Prepared under the Auspices of the AMERICAN SOCIETY OF AGRONOMY VOLUME V Edited by A
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Xem thêm: Advances in agronomy volume 05 , Advances in agronomy volume 05 , Chapter 1. A Half Century of Wheat Improvement in the United States, II. Acreage, Yield per Acre, and Production in the United States, III. Improvement in Cultural Practices, IV. The Role of Improved Varieties, V. Improvements in Methods of Breeding Wheat, VII. Control of Insect Pests of Wheat, Chapter 2. The Soil Organic Fraction, VII. Contribution to Plant Nutrition, III. General Characteristics of Modern Farming, Chapter 4. Chemical Weathering of Minerals in Soils, II. Relative Stability of Minerals; Weathering Sequences and Indexes, III. Factors Affecting the Reaction Rates of Chemical Weathering, IV. Frequency Distribution of Minerals in Soils in Relation to Chemical Weathering, V. Weathering Release of Nutrient Elements from Soil Minerals, Chapter 5. The Changing Pattern of Agronomy and Horticulture in Canada, III. Field Husbandry, Soils and Agricultural Engineering, II. Factors Influencing Soil Structure, III. Soil Management for Structure Maintenance, IV. Influence of Rotations on Conservation and Productivity

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