Pengendalian gulma tanaman kedelai dengan berbagai cara budidaya.
1990
Harsono A. | Kuntyastuti H.
The objective of the research was to get efficiency of weed control to produce high grain yield of soybean. The research was conducted at experimental farm of Sub Balittan Mojosari during 1989 dry season. Factorial randomized complete block design with three replications was used in this experiment. The first, second and third factors were fertilization (i.e.: P1 = 50 kg urea + 100 kg TSP + 50 kg KCl/ha; P2 = P1 + Rhizogen 0.5/5 kg seed; P3 = P2 + Dharmasri 3cc/20 l water nearly flowering), mulching of rice straw (i.e: M0 = no mulch; M1 = 5t/ha; M2 = 10 t/ha) and weed control (i.e.: G0 = no weeding; G1 = weeding at V-4 and V-7; G2 = pre emergence herbicide Lasso 6 cc/l water and weeding at V-7) respectively. The variety used in this experiment was Wilis with plant spacing 10 cm x 40 cm, two plants per hole on plot size 3 m x 4 m. Pest and disease control were conducted five times, and irrigation conducted three times. The result showed that Rhizogen and Dharmasri do not increase plant height and weed growth. Mulching at the rate of 5 t/ha and 10 t/ha rice straw reduced weed growth 35 percent and 51 percent respectively compared with no weeding. Pre emergence herbicide Lasso + weeding at V-7 reduced weed growth better than weeding at V-4 and V-7. However application of Rhizogen and Dharmasri, mulching and weed control do not change the rank of SDR value of weed. The role of weeding to increasing number of fill pod and soybean yield better than Rhizobium, Dharmasri and mulch. The highest grain yield (1.37 t/ha) was obtained by combination of 100 kg urea + 100 kg TSP + 50 kg KCl/ha + Rhizogen 0.5 g/5 kg seed + Dharmasri 3 cc/20 l water + mulch of rice straw 10 t/ha.
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