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Show Nitrogen Main Plant Food Needed For Lawns in Area Nitrogen is the main plant food your lawn may need, according ac-cording to Wallace Sjoblom, Iron County Agent. Fertilizer tests county agents conducted on lawns In Utah during the past three summers show that lawns benefit most from applying nitrogen. ni-trogen. Numerous fertlizer tests using nitrogen, phosporus, and potassium potas-sium fertilizers, indicated there is little or no need to apply anything any-thing hut nitrogen on lawns where there Is no clover in the lawn. However, if you want clover, clov-er, you will need Xj hdd some phosporus to maintain a little higher level in the sol than exists ex-ists there naturally. None of the tests indicated any need to apply ap-ply potassium fertilizers. As a result of these tests and other experience noted in the state, we recommend the following: fol-lowing: Apply nitrogen once or twice a year, depending upon your situation. sit-uation. You may apply nitrogen in early spring and let that suffice suf-fice for the entire year, or you might apply nitrogen twice a year, once in May and once in late summer. Use four to six pounds of Ammonium nitrate or seven to ten pounds of ammonium ammon-ium sulphate per 1,000 square ft of lawn. |