Encyclopedia Americana, Količina 8Americana Corporation, 1965 |
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Zadetki 1–3 od 47
Stran 65
... varieties in use in 1952 indicated that at least one third of the 31 varieties had been discarded . Since the early 1930's much has been done to encourage United States farmers to use improved and better - adapted varieties of cotton ...
... varieties in use in 1952 indicated that at least one third of the 31 varieties had been discarded . Since the early 1930's much has been done to encourage United States farmers to use improved and better - adapted varieties of cotton ...
Stran 68
... Varieties . - Improvements in cotton varieties in the modern sense may not be much older in other cotton - producing countries than they are in the United States . Many centuries ago , however , some crude form of seed sorting or ...
... Varieties . - Improvements in cotton varieties in the modern sense may not be much older in other cotton - producing countries than they are in the United States . Many centuries ago , however , some crude form of seed sorting or ...
Stran 83
... varieties ; to deterioration in soil fertility ; and to failure of farm prices accurately to reflect market differentials , thus providing little or no incentive for the individual grower to produce the longer - staple , lower ...
... varieties ; to deterioration in soil fertility ; and to failure of farm prices accurately to reflect market differentials , thus providing little or no incentive for the individual grower to produce the longer - staple , lower ...
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