Ratna W. Arief

Increasing Rice (Oryza sativa L.) Productivity and Farmer’s Income through the Implementation of Modified Double Rows Planting System

Robet Asnawi, Ratna W. Arief, . Slameto, Reny D. Tambunan, . Martias, Made J. Mejaya & . Fitriani · Annual Research & Review in Biology · 2021

Rice (Oryza sativa L.) productivity in Indonesia is leveling off. The study aims to determine the effect of the Jejer Manten double rows modified planting system on the growth, productivity, and economic feasibility of the rice farming system. The study was conducted in Lampung P...

Open access Research Article 10.9734/arrb/2021/v36i830409

Yellow Sap Contamination on Mangosteen (Garcinia mangostana L.) Fruit in Relation to Soil Calcium Contents and Plant Tissue

. Martias, Titin Purnama, . Riska, . Affandi, Sri Yuliati, Nini Marta, Tri Budiyanti, Deni Emilda, Dewi Fatria, . Hendri, I. G. K. D. Arsana, Ratna W. Arief, Robet Asnawi & Made J. Mejaya · Annual Research & Review in Biology · 2021

Yellow sap contamination (YSC) is one of the mangosteen quality constrain in Indonesia. Calcium is the prominent nutrient that influence the incidence of yellow sap contamination. A research with objective to observe the relationship between incidence YSC and Ca availability in s...

Open access Research Article 10.9734/arrb/2021/v36i930418