Here is the latest theme for your blog that is more dedicated to agricultural theme and according to the author of this theme This is a free wordpress theme. It is microformats enabled. It features custom menu, custom background, custom header, multiple colour schemes, mutliple layouts, your feedburner url can be given and custom stylesheet for easy customization.
It has custom stylesheet for easy personalization. This theme is xhtml 1.0 transitional and css 3.0 validated and included few descent features like blue, custom-background, custom-header, custom-menu, dark, fixed width, green, light, microformats, red, right sidebar, sticky-post, theme-options, threaded-comments, three columns, two columns, yellow.