وسائل ٹیگ کردہ: Droughts
2 items found (Showing 1 - 2)
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Key Resource 01 جنوری 1999 This book looks at the ways in which the productivity of food crops in the semi-arid tropics may be increased, and yields safeguarded, by both genetic and agronomic means. 2 Copies.
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The story of Canada's conquest of the prairie droughtduring the Dust Bowl years of the 1930s.