Issue link: http://read.uberflip.com/i/765975
WWW.POTATOGROWER.COM 101 Ventilation Refrigeration Humidification Controls 1.888.GELLERT www.gellert.com 160497AgrSto13s.indd 1 12/5/16 11:35 AM AMERICAN-NEWLONG, Inc. 5310 South Harding St., Indianapolis, IN 46217 Phone: 317-787-9421, Fax: 317-786-5225 www.american-newlong.com Ask for your FREE PRODUCT GUIDE! American-Newlong — Your Bag Packaging Specialist! A1-PB Series Filled Bag Closing Machine with DS-9C Bag Closing Head American-Newlong offers the latest in filled bag closing technology with the A1-PB height adjustable bag closing machine and DS-9C high speed, oil enclosed bag sewing head. The A1-PB and DS-9C bag closing system is equipped with vector drive technology which allows for easy speed matching to existing conveyors, promotes maximum speed flexibility, and facilitates fast start/stop sewing action that reduces material cost. 150169AmeNew13.indd 1 6/23/15 3:51 PM in turn digest the fungus, and higher organisms feed on them both, in turn excreting unneeded nutrients. Each time, carbon dioxide is released, total organic matter declines, and the amounts of each nutrient in the mineral form increase. Membranes and cell walls of microbial organisms are disrupted, and the contents of the cells—including the soluble phosphate stored in the vacuole— are often released into the soil. Each time a nutrient cycles, it goes through release as well as re-absorption. Some of it is prone to loss before another organism can take it up. It can't be assumed that more nutrient cycling, on its own, means less nutrient loss. Synchrony of release with re-absorption is likely the most important attribute for minimizing nutrient loss. Soil health is a concept worthy of attention. The practices it encourages— cover crops, conservation tillage, crop rotation and more—go a long way toward preventing soil degradation. These practices are essential to averting the worst cases of phosphorus loss. Some of the latest loading reduction targets, however—particularly those aimed at reducing losses of dissolved phosphate— may not be met through soil health alone, and definitely require attention to nutrient application placement and timing as well. Many studies, dating back decades, document that in conservation tillage systems—as the top inch or two of soil enriches in soil organic matter, biological activity and nutrients—concentrations and often loads of dissolved phosphorus in runoff increase. Soil conservation should be practiced with care. It can't be used as an excuse to leave phosphorus fertilizer or manure on the surface of the soil. The optimum combination of tillage and fertilizer placement practices is likely to be specific to soil and landscape, and in many areas, requires continuing research. This article originally appeared in the International Plant Nutrition Institute's Plant Nutrition Today Newsletter in October 2016.