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Effect of slurry solids slurry and straw plus slurry manuring on potato yield


Effect of slurry solids slurry and straw plus slurry manuring on potato yield



Archiv fuer Acker- und Pflanzenbau und Bodenkunde 24(11): 737-743



A field trial was conducted on a Sandlehm-Braunschwarzerde soil to compare the influence of various organic manures with that of calcium ammonium nitrate (CAN) on the yield of potatoes. Increasing levels of manuring up to 300 kg/ha N applied prior to cultivation resulted in reduced yields in the order cattle slurry, slurry plus straw, cattle slurry solids; as expected, none of the organic manures caused yield increases as obtained after CAN application. The mineral fertilizer equivalents accordingly amounted to 48, 40 and 30. Nov./Dec. and spring were the most favorable application times leading to approximately equal results. Slurry application in early autumn resulted in the lowest yields. The combination of slurry and straw manuring minimized yield differences due to application times. In the combination of slurry solids and mineral fertilizer N, the N share from slurry solids should be kept below 75% of the gross N supply.

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Related references

The effect of slurry solids, slurry and straw plus slurry manuring on potato yields. Archiv fur Acker und Pflanzenbau und Bodenkunde 24(11): 737-743, 1980

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