PLANTING DISTANCE AND DOSE OF ORGANIC MANURE ON THE SOIL CHEMICAL PROPERTIES AND YIELD OF LOWLAND RICE
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The objectivies of the study were to evaluate the effects of planting distance and dose of manure applications on soil chemical properties and yield of lowland rice. Experimental design was used a factorial randomized complete block design with three replications. The treatments consisted of plant spacing (30 x 15, 30 x 30 and 30 x 45 cm) and manure doses (0, 10 and 20 tons manure ha-1). The results showed that a mixture of manure and urea signicicantly affect the C-organic, N-total and Pavailable in the soil. The average of increasing C organic was classified as low catagories, N-total was medium and P-available was low. There was significant interaction effect between plant spacing and mixture of dose manure and urea on the grain yield. Increasing the level of planting distance and dose organic manure will be stimulated on plant heigh and some yield components of rice crops and the optimized level for organic manure application was 20 tons.ha-1 due to limitated Corganic content in the rice field of Empetring village, Darul Kamal Aceh Besar Subdistrict area. The average of grain yield was reached 6,26 tons ha-1 which gained in doses of 10 tons ha-1 manure and urea mixture.