The New Encyclopædia Britannica, Volume 19Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 286
... conserve land resources than have agriculturalists . In the management of arable lands , for example , the guiding principle ... conservation . The advantage that the ecologist sees in the use of domesticated live- stock in the rational ...
... conserve land resources than have agriculturalists . In the management of arable lands , for example , the guiding principle ... conservation . The advantage that the ecologist sees in the use of domesticated live- stock in the rational ...
Page 981
... Conservation ; F.F. ROCKWELL and ESTHER C. GRAYSON , The Rockwells ' Complete Guide to Suc- cessful Gardening ( 1965 ) , an excellent reference work for gardeners ; L.J. HUSSEY and C. PESSINO , Collecting Small Fos- sils ( 1970 ) ...
... Conservation ; F.F. ROCKWELL and ESTHER C. GRAYSON , The Rockwells ' Complete Guide to Suc- cessful Gardening ( 1965 ) , an excellent reference work for gardeners ; L.J. HUSSEY and C. PESSINO , Collecting Small Fos- sils ( 1970 ) ...
Page 1108
... conserve soil mois- ture , and control erosion and weeds . In many cases mulches are used for their pleasing effect as ... conservation or addition of heat . Radiational heat loss may be reduced by hot caps , cold frames , or mulches ...
... conserve soil mois- ture , and control erosion and weeds . In many cases mulches are used for their pleasing effect as ... conservation or addition of heat . Radiational heat loss may be reduced by hot caps , cold frames , or mulches ...
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