COLLECTION OF LEAFY MASS AND ARTICHOKE TUBERS, DEPENDING ON THE TERM OF HARVEST AND FERTILIZERS
The aim of the research was to study the impact of harvesting on the yield of artichoke at different levels of mineral nutrition. Experiments were carried out in 2009, 2010 and 2012 in the educational research and production center of Chuvash state agricultural academy on light-grey forest soil of semi-loamy granulometric composition. The soil of the experimental area is weak acid, рН <sub>kst</sub>is 5,9. The experiment was held 4 times, the location of the plots was randomized. Tubers were planted to a depth of 6-8 sm according to scheme 70 x 40 sm. Artichoke of rareripe variety was used for landing. Experience was laid according to the following scheme: 1) cleaning of aboveground mass at the end of August, the digging of tubers in the middle of September, without fertilizers (control); 2) cleaning of aboveground mass at the end of August, the digging of tubers in the middle of September, fertilization in a norm N <sub>60</sub>P <sub>60</sub>K <sub>9o</sub> cleaning of aboveground mass in the second decade of September, the digging of tubers in the beginning of October, without fertilizer application; 4) the cleaning of aboveground mass in the second decade of September, the digging of tubers in the beginning of October, fertilization in a norm N <sub>60</sub>P <sub>60</sub>K <sub>9o</sub> The largest collection of leafy mass on both backgrounds of mineral nutrition is obtained by harvesting in late August, the collection of tubers increased when digging them in the later period in the beginning of October. Introduction of nitrogen-phosphorus-potassium fertilizers in a norm N <sub>60</sub>P <sub>60</sub>K <sub>9o</sub> leads to a further increase of the collection of artichoke tubers of rareripe variety rather than leafy mass.