This study aimed to observe the growth and yield of Chiherang rice (Oryza sativa L) and weeds in response of different planting methods and weeding frequencies. We conducted the study in Semampir, Argorejo, Sedayu Sub-district, Bantul District on April until August, 2018. We arranged field study using randomized complete block design in 3x2 factorials with 3 times repetition. First factor was Jajar legowo (J) stratified as 3 levels; 2:1 (J1), 4:1 (J2), dan 6:1 (J3). Second factor was weeding frequency in 2 levels which were 2 times in 14 and 70 hst (P1) and 3 times in 14, 49 and 70 hst (P2). Observed variables include Ciherang rice growth (plant height, total tillers, percentage of productive tillers, fresh and dried weight of each plant), components of rice yield (grain dry weight of each harvest, percentage of filled grains, yield of each hectares), and weeds (type of weeds, fresh and dry weight of weeds). We analyzed results using variance analysis with significant level of 5%, followed with 5% DMRT test. We found that application of jajar legowo planting method and weeding frequency do not correlates with all growth and weeding frequency variables of Ciherang rice and weeds. 2:1, 4:1 and 6:1 jajar legowo planting methods do not show significant impact both on Ciherang rice growth and yield, and also weeds. Both 2 times (14 and 70 hst) and 3 times (14, 49 and 70 hst) also do not have significant impact on all variables observed.Keywords: Jajar Legowo, Weeding Frequency, Ciherang Rice

Self-supporting food, especially rice which has become a problem for a long time in Indonesia should be overcome gradually. Specifically, this research aimed to support self-supporting food by growing plants, especially rice in dry land by using water effectively and efficiently. The use of water effectively and efficiently here means providing water that is not excessively, only in the root zone of the plant. It is in line with the objective of this re-search that is to design a prototype of device that can be used to create artificial rain to irrigate the surface of land and it will be stopped if the water has reached the root zone of the rice plants. The longer the rain given, the deeper the water absorption will be. The research results showed that the longer the rain is given, the deeper the water absorption will be. The result of research with the length of rain for 120 minutes, it needed the average volume of water of 331.83 liters and resulted in the thickness of absorption as follows: Treatment T0 (uncultivated land) the average of absorption was 7.3 cm, T1 (the land was cultivated by hoeing) the average of absorption was 18.09 cm and T2 (the land was cultivated by hoeing and loosening) the average of absorption was 21.3 cm. In details, the research data can be seen in table 1 and 2. The regression analysis of the volume of water and the thickness of water absorption is shown below:  Treatment T0  Y = 2.14 + 0.018 X; Treatment T1  Y = 4.64 + 0.042 X; Treatment T2  Y = 6.09 – 0.047 X Furthermore, the result of hypothesis testing showed that there is a real difference in the three treatments. It means that with the same need of water volume, there is a significant difference in the thickness of water absorption as shown in the three treatments.

The purpose of this study was to determine the effect of land preparation methods on the soil infiltration which can be used as a basis for designing irrigation for dryland rice cultivation. The study was arranged in a completely randomized design (CRD) with three land preparation treatments, namely T0 (no tillage), T1 (hoeing), and T2 (hoeing plus loosening). Each treatment was carried out with three replication plots. Artificial rain was given with an average intensity of 4.61 mm/h for 120 min. Observations were made on the infiltration thickness and rainwater volume. Results showed that land preparation methods resulted in very significant differences in the cumulative infiltration depth and infiltration rate, where the T2 treatment caused the highest infiltration. During 120 minutes of rain, 331.83 liters of water volume was poured out and resulted in an average infiltration thickness of 7.3 cm for T0 (no tillage), 18.09 cm for T1 (hoeing), and 21,3 cm for T2 (hoeing plus loosening). The results also showed that cumulative infiltration (y) increased with rain water volume (x) that followd a logarithmic curve with an R2 value of more 94-98% for the three land preparation methods with order T2 > T1 > T0.Keywords: Rain, Tillage, Infiltration, Dry land, Rice

Asupan gizi yang baik sangatlah diperlukan bagi masyarakat Indonesia untuk meningkatkan kontribusi mereka dalam pembangunan nasional (Suparmoko, 1995). Kacang hijau sebagai salah satu sumber protein nabati, dalam pengembangannya baik melalui ekstensifikasi maupun intensifikasi lebih banyak dilakukan dengan sistem tumpangsari dengan tanaman lain seperti jagung. Hal ini akan menimbulkan masalah yaitu diperoleh hasil lebih rendah akibat tidak terpenuhinya secara tepat baik dalam jumlah maupun lamanya kebutuhan kacang hijau terhadap sinar matahari serta kapan saat yang tepat dalam fase pertumbuhan yang mutlak membutuhkan sinar matahari (Anonim, 1990).Upaya untuk mendapatkan hasil kacang hijau yang tinggi guna memenuhi kebutuhan sumber protein nabati masyarakat Indonesia yang terus meningkat, perlu dilakukan penelitian untuk

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