SU0004208 SSNL - Laserfiche WebLink

Home Browse Search

` September 3,2003 Job Number:LG03-226 Page 7 and are held by the negative sites on the clay in the soil; therefore, NH,' forms of N leach very little. In sands where there is very little clay, ammonium forms of N can leach. Coarse-textured sands and some muck soils are the only soils where ammonium leaching may be significant. One 3 way to minimize N leaching and denitrification is to minimize the time the N is in the soil before plant uptake. This cuts down on the time when conditions are favorable for losses.' According to Mr. Pete Katzakian, approximately 120 units per acre of N are broadcast on the property when producing processing tomatoes, and 100 units per acre are applied to the property when producing wheat and kidney beans. The property is irrigated by a well that is located more than a quarter of a mile to the east of the subject property. ` According to Mr. Mick Caneveri of the University of California Agriculture Extension Office in Stockton, California,processing tomatoes require 200+units per acre, wheat requires 100-150 units per acre and kidney beans require 80-120 units per acre. Mr. Caneveri was quick to point out that there are residual amounts of nitrogen in the soil and the amounts applied do not necessarily match the amounts needed for maximum yield of the crops. ►- With the possibility of the development of residential home sites, the amount of agriculture production on the property may be reduced or negated depending on the wishes of the new property owners. A quantitative analysis would be difficult to estimate for the residential parcels. Due to these uncertainties, no analysis was made to estimate the contribution of leaching nitrates in irrigation water from future agriculture. The following nitrate loading calculation will only predict the added load of nitrates in waste water from the use of septic systems in the future. 7.3 Quantity and Quality of Domestic Wastewater The average total nitrogen concentration of the domestic waste water is normally considered to ` be 20-85 mg/L-N with a typical concentration of 45 mg/L-N. 5 A fully developed parcel of 12 4 Vitosh,M.L.,J.W.Johnson and D.B.Mengel,July 1995.Tri-state Fertilizer Recommendations for Com,Soybeans,Wheat and Alfalfa,Extension Bulletin E-2567. 5 Crites,R.W.,and Tchobanoglous,G., 1998,Small and decentralized wastewater management systems: WCB McGraw-Hill,Boston,First Edition,see Table 4-14,page 181. eERaoy 1 M Z Y r