. Cranberries; : the national cranberry magazine. Cranberries. TIMELY FACTS ON FERTILIZATION (Editor's Note: The following was prepared by Dr. Chandler to aid Massachusetts growers in in- terpreting and making effective use of the Cranberry Fertilizer Chart, issued this year for the first time.) This chart should be considered as a guide or a tool and should be used only with judgment. Some bogs have high production with- out the use of fertilizer while others have low production in spite of fairly heavy applications of fertilizer, the difference de- pending upon age of bog, kind of peat drain
. Cranberries; : the national cranberry magazine. Cranberries. TIMELY FACTS ON FERTILIZATION (Editor's Note: The following was prepared by Dr. Chandler to aid Massachusetts growers in in- terpreting and making effective use of the Cranberry Fertilizer Chart, issued this year for the first time.) This chart should be considered as a guide or a tool and should be used only with judgment. Some bogs have high production with- out the use of fertilizer while others have low production in spite of fairly heavy applications of fertilizer, the difference de- pending upon age of bog, kind of peat drainage and management. Some bogs do best with 3 to 4 times the regular recommendation on the chart. The general notes should be read if growers are to get the nrost out of the fertilizer applications. The first refers to drainage— 1. The best response from fer- tilizer is obtained when good drainage and irrigation are provi- ded. 2. Insect or disease injury may cause off-color similar to nitrogen deficiency. 3. Best quality of fruit will be obtained with a 1-2-1 ratio. A 1-1-1 ratio, such as 10-10-10, may be made into a 1-2-1 by applying 50 pounds of superphosphate for every 100 pounds of 10-10-10 used. Where vine gro^vth is de- sired a 1-1-1 ratio may be used. 4. Apply dry fertilizer only on dry vines. Airplane and mechani- cal spreaders give an even, eco- nomical distribution but careful hand spreading of fertilizer gives a more selective application. Split applications usually give better results but the benefit may not justify the added cost. 5. Urea and liquid fertilizers may be applied vdth insecticides. Urea supplies only nitrogen, there- fore phosphorus and potash should be applied dry to provide a 1-2-1 ratio. For example, applying 200 pounds of superphosphate and 40 pounds of muriate of potash for every 40 pounds of Urea gives a 1-2-1 ratio. Twelve 6. Fertilizer applied before the last of April or after nrid-July has little effect on annual weed growth. 7. Fertilizers
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