The American Quarterly Journal of Agriculture and Science, 1-2. ciltler

acre agriculture alkalies Alumina ammonia animal appear ashes atmosphere become blood body bones buds butter carbonic acid caseine Cecidomyia cent churned climate clover color composition contain corn cows cream crop cultivation decomposition deposited draining earth effect elements experiments fact farm farmer feet fertility fibrin flower fruit furnish give grain grass grow growth guano heat hydrogen important inches inorganic insects kind land larva larvæ leaves Liebig lime limestone magnesia malic acid manure matter milk nature New-York nitrogen observations organic oxalic acid oxygen phosphate of lime phosphates Phosphoric acid plants plough portion potash potassa potatoes principles produced Prof proportion proximate principles pupa quantity remarks require river closed rocks roots salts sand season seed Silica silk soil species spring straw substances Sulphate surface temperature tion tissues trees vegetable wheat wheat-fly whole winter wool worms