Anion exchange membrane soil nitrate predicts turfgrass color and yield.

Desirable nitrogen (N) management practices for turfgrass supply sufficient N for high quality turf while limiting excess soil N. Previous studies suggested the potential of anion exchange membranes (AEMs) for predicting turfgrass color, quality, or yield. However, these studies suggested a wide range of critical soil nitrate-nitrogen (NO3-N) values across sample dates. A field experiment, in randomized complete block design with treatments consisting of nine N application rates, was conducted on a mixed species cool-season turfgrass lawn across two growing seasons. Every 2 wk from May to October, turfgrass color was assessed with three different reflectance meters, and soil NO3-N was measured with in situ AEMs. Cate-Nelson models were developed comparing relative reflectance value and yield to AEM desorbed soil NO3-N pooled across all sample dates. These models predicted critical AEM soil NO3-N values from 0. 45 to 1.4 micro g cm-2 d-1. Turf had a low probability of further positive response to AEM soil NO3-N greater than these critical values. These results suggest that soil NO3-N critical values from AEMs may be applicable across sample dates and years and may serve to guide N fertilization to limit excess soil NO3-N

Influence on Soil Fertility on Wheat Yield in North Dakota

The topic was the retention and improvement of North Dakota soils to grow Wheat, it's most grown crop. Nitrogen is one of the most required nutrients for high wheat yield. When crops are exported from the state, those nutrients trapped in those crops leave the state. High residue retention tillage methods aid in the maintenance of present levels of wheat production

The Effect of Foliar Application of Urea Ammonium Nitrate On Yield and Protein Content of Wheat

Includes the following correction: In the July-August issue (Vol. 46, No.1), photos and cutlines were switched in the article "The Brood Cow Efficiency Study--A Progress Report." The photos with their correct cutlines appear below.The articles discusses nitrogen deficiency in North Dakota farm land and farmers’ attempts to elevate it to increase crop yields. Field trials were established in 1985 and 1986 to test the effect of foliar application of urea ammonium nitrate on yield and in the protein content of wheat. This did result in yield increases if the levels of nitrate nitrogen in the soil were insufficient for maximum plant yield. Foliar application should not exceed 40 pounds per acre to avoid lasting damage and decreased yield

Relationships of Potato Yields and Quality to Soil Test Values and Fertilizer Applications

The use of soil tests to accurately predict nutrient needs is dependent on (1) having a soil test procedure that accurately predicts when a nutrient is lacking, and (2) on the calibration of that soil test. Potatoes were grown at 17 sites in the Red River Valley over a 5-year period to determine the influence of N-P-K fertilizer on yield at various soil test levels

Time and Method of Fertilizer Application For Potatoes

The article focuses on field studies on when is the best time and method of application of fertilizer for potatoes. The conclusion was: avoid major tillage in the springtime, broadcast phosphorous fertilizer in the fall season and apply nitrogen in the spring time