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If a crop of wheat removes 20 kg of nitrogen per hectare of soil,what mass of the fertilizer,calcium nitrate would be required to replace the nitrogen in a 10 hectare field ? |
| If a crop of wheat removes 20 kg of nitrogen per hectare of soil, what mass of the fertilizer calcium nitrate Ca(NO3)2 would be required to replace the nitrogen in a 10-hectare field ? (N = 14; O = 16; Ca = 40. Answer to the nearest kg.) Ans, Total nitrogen required by 10 hectares = 10 x 20 = 200 kg. Ca(NO3)2 N2 or 164 parts of Ca(NO3)2 gives 28 gm of N2 Now 28 parts of N2, 164 parts of Ca(NO3)2 200 parts of N2 ,(164 x 200) / 28 = 1171.4 kgs. |
