TY - JOUR AU - Lara Mártez, Julio AU - Acosta, Nelia PY - 1992/01/01 Y2 - 2024/03/28 TI - Shrimp shell amendment, soil fertility and tomato growth JF - The Journal of Agriculture of the University of Puerto Rico JA - JAUPR VL - 76 IS - 1 SE - Articles DO - 10.46429/jaupr.v76i1.4117 UR - https://revistas.upr.edu/index.php/jaupr/article/view/4117 SP - 21-27 AB - The effect of shrimp shell amendment on the fertility of a sandy soil mixture, and on the growth of tomato variety Manalucie highly susceptible to nematodes, was evaluated in a greenhouse experiment. Taller and heavier tomato plants were obtained when planted 25 days after application of shrimp shell to the soil at 2 to 4% levels. This material has potential as an organic-nematicidal amendment for the control of <em>Meloidogyne</em> spp. Shrimp shell used as soil amendment at any of the dosages 0 to 10% v/v, or applied 5 to 35 days before transplanting, raised soil pH and increased the amount of phosphorus, calcium and magnesium in the soil. However, rates higher than 6% or applications less than 25 days before transplanting had detrimental effects on tomato plants. ER -