Lagazo, Maria Jhelicca M.  <br/><br/>
Response of sweet potato varieties to varying rates of carrageenan plant growth regulator /  
Mari Jehllica M. Lagazo  
 -  2019 
 - xvi, 62 leaves   28 cm. 
<br/><br/> Thesis (BS Arg (Hort) - Mariano Marcos State University  
<br/><br/> 		ABSTRACT<br/><br/>LAGAZO, MARIA JHELLICA M. 2019. Response of Sweet Potato<br/>Varieties to varying Rates of Carrageenan Plant Growth Regulator.<br/>Undergraduate Thesis. College of Agriculture, Food and Sustainable Development<br/>Mariano Marcos State University, City of Batac, 2906 Ilocos Norte. 61 pp.<br/>Adviser: Dr. Artemio B. Alcoy<br/>Co-adviser: Mr. Pio G. Belen, Jr.<br/>	<br/>	A study on the response of sweet potato varieties to varying rates of<br/>carrageenan plant growth regulator (CPGR) was conducted from November 8, 2018<br/>to February 16, 2019 at the Mariano Marcos State University Experimental Farm.<br/>City of Batac, Ilocos Norte. The study aimed to: a) compare the agronomic<br/>performance of two sweet potato varieties; b) evaluate the growth and yield response<br/>of sweet potato to different rates of CPGR; c) identify the most appropriate rate of<br/>CPGR that could give the highest yield; d) determine the interaction between sweet<br/>potato varieties and different rates of CPGR; and e) assess the production economics<br/>of sweet potato production applied with different CPGR rates. The field experiment<br/>was laid out in Strip-plot in Randomized Complete Block Design (RCBD).<br/>	The sweet potato varieties (NSIC Sp25 and PSB Spl) served as the vertical<br/>factor and the rates of CPGR (7.5, 10 and 12.5 1 ha') as the horizontal factor. The<br/>experimental unit plot size used was 5 mx 4 m (20 m').<br/>Results revealed significant difference between NSIC Sp25 and PSB Spl on<br/>vine length, vine weight and percentage of small-sized roots. Between the two varieties, NSIC Sp25 produced longer vines, heavier vine weight per plant and higher<br/>percentage of small-sized roots. Moreover, significant differences were revealed<br/>among CPGR rates in terms of vine weight, root yield, percentage of medium-sized<br/>and large-sized roots and percent marketable roots.<br/>Analysis of variance also revealed significant interaction between sweet<br/>potato variety and CPGR rates in terms of vine weight, root yield and small- and<br/>medium-sized roots.<br/>	The sweet potato variety NSIC Sp2S is recommended for higher profitability.<br/>On the other hand, the application of 7.5 1 ha'' CPGR which gave the highest<br/>production of marketable root yield should be adapted in sweet potato production.<br/>However, it is further recommended that a similar research along this line be<br/>conducted using other varieties of sweet potato to verify and come up with a more<br/>conclusive result.<br/><br/><br/><br/><br/>