Technology is certainly beneficial to the efficiency of agricultural production. There are plenty of questions about the long term benefits vs. costs to the use of genetic engineering, certain highly developed pesticides, etc. These questions are pointed out above, as are some of the trade-offs of using "advanced methods" in agriculture.
As in most things, the tools available to us can be used wisely and well and they can be used poorly. It's up to us to choose.
Although the benefits to applying technology to large scale agriculture have been manifest in the last several decades, one of the dangers is its prevalence for particular strains of crops, which may or may not be viable in the future.
Thanks to technology, agriculture has become much more productive than it used to be. This has particularly been true of the so-called "Green Revolution," in which experimentation led to far greater yields of certain crops (such as rice) and turned net importers of food (such as India) into self-sustaining agricultural economies.
Post 2 is definitely correct, though we do have to consider the greater overall context. The use of technology and chemicals and such can lead to problems such as pollution of water supplies and soil erosion. So while the yields are certainly better, technology and chemicals do have problems associated with them.