The costs of inorganic fertilizers have been increasing in recent years, and it is necessary to look for new sources of cheaper fertilizers, an alternative would be fish hydrolysate. The objective was to evaluate the technical feasibility of the effect of a fish hydrolyzate on the yield components and anthocyanin content (color value) from purple corn. The experimental design was a randomized block with a factorial arrangement of two varieties (v1 = PMV-581 and v2 = Pacarán) x two application moments m1 = Alopes forte 3 (V6, V10, R1 applied on leaves, stem and drench) and m2 = Alopes forte 4 (V6, V10, R1 and R3 applied on leaves, stem, drench and ear) x three doses (d1 = 1.5 l·ha-1, d2 = 3.0 l·ha-1, d3 = 4.5 l·ha-1) and two additional treatments of conventional N-P-K fertilization, with each variety, forming 14 treatments. For grain, ear and corncob, the combination that obtained th...

Nutritional mismanagement and the use of low-quality seed tubers significantly limit the yield and quality of potato crops. The purpose of the present study was to evaluate the effect of different calcium (Ca) doses on the agronomic performance of the potato crop, Canchan cultivar, using farmer or conventional seed tubers (declared category) and certified category seed tubers. The study was conducted at the San Juan de Yanamuclo farm, in San Lorenzo District, Jauja Province, Junín, using a randomized completely block design in divided plots with four replications. Seed types (conventional and certified category) the subplot level the Ca doses (0, 30, 60, 90, 120, 150, and 180 Kg·ha-1) were distributed. The results show that the application of 180 Kg·ha-1 of Ca, regardless of the seed type used, increased the tuber weight per plant and per area in the Canchan cultivar, as well as the n...