Fertilizers and Crops: Or, The Science and Practice of Plant-feeding; a Presentation of Facts, Giving Practical Methods for Using Fertilizers in Crop Growing, with Special Emphasis on the Reasons Underlying Their Use, and on the Conditions of Their Greatest EfficiencyOrange Judd Company, 1912 - 734 páginas |
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abundance acid phosphate agricultural ammonia amount of nitrogen amounts of plant-food animal applied available phosphoric acid available plant-food bacteria bone calcium carbonate calcium compounds calcium hydroxide calcium nitrate calcium oxide calcium phosphate cent chemical clover commercial fertilizers composition corn cover-crops decomposed decomposition dissolved effect elements especially excrements farm manure farmers favorable fertilizing materials fresh manure fruit furnish grain green green-crop manure growing grown growth hydroxide insoluble kainite large amounts leaves leguminous leguminous crops less light soils loams magnesium mixed moisture nitrate nitrogen nitric acid nitrification oats organic matter organic nitrogen oxygen percentage phate phos phosphoric acid phosphorus phosphorus and potassium plant-food constituents plant-food materials plants plowed potash potassium chloride potassium compounds pounds an acre pounds of nitrogen present quicklime roots salt season seed slaked lime sodium nitrate soluble solution straw sulphuric superphosphate supply tankage tion usually vary wheat