Laserfiche WebLink
2) The total acreage of the dryland pastureland being considered for production yield will be <br />measured and one sample will be taken forevery four acres of field. For example, if the study <br />area has 60 acres total, 15 samples will be taken. If the acreage is less than 60 acres, then <br />a minimum of 15 samples will be taken. <br />3) Once the number of sample points is determined, a random number generator such as the <br />one provided in the QUattroPro Spreadsheet Program, will be run. The random number <br />generator will use the total number of 50 foot by 50 foot block numbers generated in step 1 <br />of this procedure and the number of sample points required from step 2 of this procedure. <br />4) All randomly selected sample blocks from step 3, will be located in the field by standard <br />surveying methods. After the 50 x 50 foot sample block is field staked, a 3 foot x 3 foot <br />sample grid square will be tossed over the back of the samplers head to determine the final <br />sample grid to be cut and collected. The vegetation within the 3 x 3 foot sample grid will be <br />clipped as close to the ground as practical and gathered and airdried for 96 hours to simulate <br />field hay drying, before it is weighed and the yield per acre is calculated. The results from <br />all 3 x 3 foot sample points will be mathematically averaged. <br />5) The data will be evaluated for sampling adequacy using the following fonnula: <br />Nmin = ((~ + t9)2 ~` (SZ)Jf(dQ)z <br />where: <br />Nm;° = minimum number of sampling grids to achieve sampling adequacy. <br />s =sample standard deviation <br />O = 90% of technical standard <br />t° =the (a=.10) t table value for a single tailed t-test with (n-1) degrees <br />of freedom <br />tO =the (a = .25) t table value for a single tailed t-test <br />d =desired level of reduction about the sample mean (0.10 for 90% <br />confidence) <br />Revegetation success for coverwill be determined using the dryland pasture reference area as the <br />basis. Total vegetative cover (live vegetation) of the reclaimed dryland pasture type in the New <br />(Revised i-is-o3~ 2.05.4(2)(e)-23 <br />