Corn is a type of plant that contains high carbohydrate. It can grow in dry season. Current climate change causes disadvantages in climatic condition such as short rainy season and long dry season. The purpose of this research is to study the effect of rhizobacteria to the yield of several corn varieties. The research was conducted in Kalasan, Sleman, Yogyakarta, Indonesia. The research used a Split Plot Design. The first factor as main factor showed a high variety of corn yield, namely Hybrid 1, Hybrid 2, Hybrid 3, and Hybrid 4. The second factor as sub-factor was rhizobacteria level (0% and 15%). The data was analyzed using Analysis of Variance. Based on the research results, there was a long dry season and short rainy season which were caused by climate change. Corn variety did not affect growth rate, yield and yield index for it’s resistant to climate change. Rhizobacteria increases the growth rate and tolerance index and making yield index to be higher than non-rhizobacteria which can help corn to survive in climate change.

Red onion has high nutrient and economic value. Onion can grow in both dry and wet season. Currently, we face climate drawbacks such as long rainy seasons and a short dry season due to climate change. This research aims to study the affects of rhizobacteria on the three red onion yield varieties. The research was conducted in Balecatur, Gamping, Sleman, Yogyakarta, Indonesia. The research used a Split Plot Design. The main factor was red onion variety, namely Bima, Biru and Thailand. The sub-factor was Rhizobacteria with a concentration of 0%, 0.75% and 1.5%. The data were analyzed using variance analysis with 5% significance level. The results showed that rhizobacteria increases the growth rate and tolerance index in red onion. Rhizobacteria does not increase yield and red onion yield index. Biru variety was as good as Thailand variety in terms of the number of bulb per plant, weight bulb per plant and yield. Thailand and Biru varieties are suitable in rainy season. Bima variety has the lowest number of bulb per plant, weight bulb per plant, growth rate, yield and yield index.

Maize is the source to have high carbohydrate and grow well in the dry season. Furthermore, climate change causes as long rainy seasons in some areas which are hampering maize growth. The research study the effects of rhizobacteria on local and composite variety growth. The research was did in Prambanan, Sleman, Yogyakarta, Indonesia. It was done by a split-plot design. The first factor was variety maize. The variety maize is local, composite, and hybrid 3 as control. The second factor was rhizobacteria. The rhizobacteria include the concentration of 0% and 20%. The results show that rhizobacteria give a total growth rate more than non-rhizobacteria treatment on maize. The rhizobacteria treatment gives the highest tolerance index. Hybrid 3 and composite variety (Bisma) are suitable variety rainy season.

This study aimed to determine the amount of land processing costs in traditional ways compared to mechanical means, and analyze the differences which can then inform farmers to be able to make production cost efficiency. The study was conducted for six months (June - October 2017) in Sleman, Bantul and Kulon Progo regencies, namely farmer groups that process using hand tractors and those who still use animal power. The research method is to create a questionnaire for farmers / farmer groups that contain questions related to the costs for land processing. The variables studied were the duration of tillage / ha, the time of land processing activities (morning, afternoon, evening or night), the method of tillage, the per-hectare cost of tillage and the depth of tillage. The data obtained was analyzed using variance analysis Complete Random Design with a 5% error rate. The results of the research in the three districts found that the traditional cultivation of land per 1000 m2 of land area requires greater operational costs than the processing of mechanical means. And land processing per 1000 m2 of land area traditional methods require much more time than mechanical means.Key words: land processing, operational costs, traditional ways, mechanical ways.