PENTAHYDRATED COPPER SULFATE X 25KG. - CONTRACTING FOR THE PURCHASE OF FERTILIZERS, ORGANIC FERTILIZERS AND FOLIAR FERTILIZER FOR THE PROJECT TO IMPROVE THE SERVICE OF THE COMPETITIVENESS OF THE COCOA PRODUCTIVE CHAIN ​​IN THE LOCALITIES OF THE DISTRICT OF TOCACHE - PROVINCE OF TOCACHE - DEPARTMENT OF SAN MARTIN. (EXPIRED)