This trial was established to study the effects of foliar fertilization, incorporation of manure and soil application of N, P, K, Mg, Fe, Mn and Zn; these nutrients were evaluated through the missing element technique. The trial was conducted in a sandy soil from central coast of Peru. Potato and kiwicha were used as test plants, the latter being used to evaluate the residual effect in each treatment. Soil fertilization for each element in mg. kg-1/pot were 200 =N, pps and K2 0; 50 =MgO and Fe and 25 =Mn and Zn. A complete randomized design with factorial arrangement and three replications was used. Replications were 4 kg soil pots. The evaluation consisted in measuring the total dry matter yield and total nutrient uptake in the potato-kiwicha. Applying 25 tn/ha of manure makes possible to supply the nutritional requirements of Fe, Mn and Zn for potato crop. It also partially supplies th...

This trial was established to study the effects of foliar fertilization, incorporation of manure and soil application of N, P, K, Mg, Fe, Mn and Zn; these nutrients were evaluated through the missing element technique. The trial was conducted in a sandy soil from central coast of Peru. Potato and kiwicha were used as test plants, the latter being used to evaluate the residual effect in each treatment. Soil fertilization for each element in mg. kg-1/pot were 200 =N, pps and K2 0; 50 =MgO and Fe and 25 =Mn and Zn. A complete randomized design with factorial arrangement and three replications was used. Replications were 4 kg soil pots. The evaluation consisted in measuring the total dry matter yield and total nutrient uptake in the potato-kiwicha. Applying 25 tn/ha of manure makes possible to supply the nutritional requirements of Fe, Mn and Zn for potato crop. It also partially supplies th...