Butac, Mark Anthony S. <br/><br/>
Growth and yield performance of cowpea (Vigna unguiculata L.) using bat during (Guano) as organic fertilizerz under Vintar, Ilocos Norte condition / 
Mark Anthony S. Butac 
 - City of Batac :  MMSU,  2022. 
 - xiii, 68 leaves :  28 cm. 
<br/><br/> Thesis ( BS in Agriculture -Major in Soil Science) -- Mariano Marcos State University-College of Agriculture, Food and Sustainable Development, Batac City  
<br/><br/>Bibliography: leaves 42-47